CA2353246C - A valve assembly, apparatus and method for filling a pressurized gas container - Google Patents
A valve assembly, apparatus and method for filling a pressurized gas container Download PDFInfo
- Publication number
- CA2353246C CA2353246C CA002353246A CA2353246A CA2353246C CA 2353246 C CA2353246 C CA 2353246C CA 002353246 A CA002353246 A CA 002353246A CA 2353246 A CA2353246 A CA 2353246A CA 2353246 C CA2353246 C CA 2353246C
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- CA
- Canada
- Prior art keywords
- gas flow
- control unit
- flow control
- gas
- valve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/30—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers
- F16K1/301—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers only shut-off valves, i.e. valves without additional means
- F16K1/302—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers only shut-off valves, i.e. valves without additional means with valve member and actuator on the same side of the seat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/30—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers
- F16K1/301—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers only shut-off valves, i.e. valves without additional means
- F16K1/303—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers only shut-off valves, i.e. valves without additional means with a valve member, e.g. stem or shaft, passing through the seat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/87917—Flow path with serial valves and/or closures
- Y10T137/87925—Separable flow path section, valve or closure in each
- Y10T137/87941—Each valve and/or closure operated by coupling motion
- Y10T137/87949—Linear motion of flow path sections operates both
- Y10T137/87957—Valves actuate each other
Abstract
Pressurized gas containers (36) are refilled from a source of high pressure gas using a valve assembly (1, 3) that comprises a first (1) and second (3) gas flow control unit, the control units having a first valve (6) and second valve (42) respectively, in which the assembly further comprises actuating means (22, 56) for cooperatively opening the valves when the control units are provided in compressed engagement.
Description
A Valve Assembly. Apparatus and Method of Filling A Pressurized Gas Container FIELD OF INVENTION
The present invention relates generally to the field of storing and dispensing pressurized gas. In particular, the present invention relates to a valve assembly for use with a pressurized gas container filling system and a method of filling a pressurized gas container such as a low-pressure gas cylinder.
BACKGROUND OF THE INVENTION
The term "gas" is used herein to describe not only the gaseous state of a substance but also an aerosol and a vapour associated with a liquified gas.
Gases are conveniently stored and transported in a pressurized state, often in a pressurized gas cylinder. For many domestic (i.e. non-industrial) applications, it is convenient that the pressurized gas cylinder be portable. For example, a scuba diver needs to have a portable supply of breathable gas in order to remain unde,~nrater for any length of time and a paramedic needs a portable supply of oxygen for administration to an injured person at the scene of an accident. In addition, DIY welding gases are also stored in portable cylinders as too is carbon dioxide in fire extinguishers.
A further example of a domestic application of pressurized gas is the use of pressurized "lighter-than-air" gas to fill balloons. Suitable "lighter-than-air" gases include helium or "balloon gas" (predominately helium). Usually, the balloons are referred to as helium-filled balloons.
In recent years, there has been a marked increase in the demand for helium-filled balloons. Such balloons are used for example as party _2_ decorations, children's' toys or promotional and advertising materials. As a result of this demand, helium-filled balloons are widely available from many different retail outlets. These outlets may specialize in other goods but sell helium-filled balloons as a side-line or may specialize in selling helium-filled balloons, e.g. stand-alone stalls located in shopping malls or high streets.
In addition, some outlets rent cylinders of pressurized balloon gas to the public. A rented cylinder would then be taken to the place where large numbers of helium-filled balloons are required so that the balloons may be filled in situ.
In such cases, the cylinders would be transported using a vehicle such as the family car.
Industry also uses cylinders of pressurized gases. For example, where an inert atmosphere is required, the atmosphere could be provided by an unreactive (or "inert") gas, stored in and dispensed from a pressurized gas cylinder.
Whilst industrial cylinders tend to hold more gas than domestic cylinders, portable cylinders in general tend to have a small storage capacity and, thus, quickly become empty and need replacing frequently.
One solution to this problem is to provide disposable containers. Gas Cont,~iner Services Limited of Roadway No. 7, Colwick Industrial Estate, Nottingham, NG4 2JW, United Kingdom provides a helium-filled balloon kit comprising a disposable helium tank under the trade mark BALLOON TIME.
More commonly, portable pressurized gas cylinders are designed to be refillable from a high-pressure gas source. Two options exist in this regard.
First, the empty cylinders may be collected and taken to a central filling depot for re-filling. The second option is to refill the cylinders at their place of use or sale. In this connection, the process of transferring gas from a high-pressure cylinder to a low-pressure cylinder is known as "transfilling".
The first option is currently the preferred option for the re-filling of cylinders for industrial use in which the cylinders are transported to the filling depot using a purpose built lorry. Unfortunately, for domestic applications (where the quantity of gas in a single cylinder is less than that for industrial applications resulting in shorter periods between cylinder refills), this approach is less attractive as it requires the transportation of large quantities of cylinders on a frequent basis, which can be expensive and time-consuming.
When a pressurized cylinder is re-filled at the filling depot, the outlet of the cylinder is connected to a filling manifold that is, in turn, connected via a flexible hose to a source of high-pressure gas. In this case, the source of high-pressure gas is a compressor or pump and vaporizer in gas flow communication with a gas source. A valve on the cylinder outlet is opened and the cylinder is charged with gas from the high-pressure gas source to a pre-set pressure by opening a feed valve. On completion, the feed valve is closed first and then the cylinder valve is closed. The filling manifold is then vented using a vent valve and the flexible hose is disconnected. This specific sequence of steps is repeated each time a cylinder is refilled. This is not only time-consuming but also requires specialist training.
A gas flow control device must then be fitted to the outlet of the cylinder before the cylinder is able to dispense gas for its intended application. For exam ple, with cylinders of balloon gas, a regulator and balloon filling attachment must be fastened to the cylinder outlet before the cylinder may be used to fill balloons.
West Winds of 33672 Pin Oak Parkway, Avon Lake, Ohio 44012, USA
provides a transfill system that allows high pressure helium gas cylinders to be refilled at retail premises using a flexible hose connected to a supply of higher pressure helium gas. The higher-pressure helium gas supply can take the form of more than one cylinder linked in series. The system uses the same sequence of connections, valve operations and disconnections as used in connection with the depot transfill system described above. Further, a gas flow control unit needs to be connected to a re-filled cylinder before gas can be safely dispensed from the cylinder to fill balloons.
Both of these systems require a specific sequence of steps in order to safely transfill a pressurized gas cylinder from a higher-pressure gas source and specialist training is required. If the valves are not operated in the correct sequence, the receiving cylinder could be under or over-filled or high-pressure gas could be released. Further, the West Winds system is designed to transfill high-pressure cylinders from a source of higher-pressure gas. If a low-pressure cylinder is mistakenly transfilled using the West Winds system, then there is a risk that the cylinder may explode causing injury to the user. In addition, both systems require the removal of a gas flow control unit from the cylinder prior to transfill and the reconnection of a gas flow control unit after the cylinder has been refilled.
These extra steps significantly increase the time taken to refill a cylinder ready for use and may require specialist training.
Widget World of Blackpole Trading Estate East, Blackpole Road, Worcester, WR3 8SG, United Kingdom provides a high pressure helium gas cylinder system for filling balloons under the trade mark MIDGET WIDGET. The system comprises a high-pressure helium gas cylinder with a valve that acts to secure the contents of the cylinder and regulates the pressure of the gas within the cylinder. The system has <~n operating handle, which operates the valve and which acts as a balloon-fillinc~ adapter. The handle is transported separately from the cylinder and is fitted by the end-user. The cylinder of this system must be returned to the depot for re-filling as it is charged to high pressure. It is not possible to refill the cylinder at the retail outlet.
There is a need, therefore, for a transfill system that can be used to refill a pressurized gas cylinder in situ, i.e. at the place at which the cylinder is used or sold, rather than having to transport the empty cylinder to a refilling depot.
There is also a need to simplify the sequence of steps taken to refill a cylinder so that no specialist training is required and so that the overall length of time taken to fill a cylinder is reduced.
SUMMARY OF THE INVENTION
It has been found that these needs have, at least in part, been fulfilled using the present invention. The 5 invention provides a transfill system that allows pressurized gas cylinders to be refilled in situ in a safe, efficient and cost effective manner. The present invention is simple to use, requires no mechanical skills and minimal training. In addition, the valve on the cylinder can be used not only to transfill the cylinder but also to dispense gas from the cylinder. The transfill process is simplified, as the valve on the cylinder does not need to be replaced before transfilling.
The valve on the cylinder is simply brought into compressed engagement with the valve of the source of high-pressure gas.
This reduces the time taken to refill a cylinder and the necessity for tools and specialist training. In this connection, it may be necessary to use a tool to remove a nozzle from the valve of the cylinder before the cylinder may be transfilled. However, tools to remove the valve from the cylinder are not required.
As the transfill process is simplified using the present invention, the risk of an accident resulting from the incorrect application of the transfill sequence of steps is reduced. The present invention also makes it difficult for users to tamper with and/or bypass the protective systems.
In accordance with one embodiment of the present invention there is provided a valve assembly comprising a first gas flow control unit for controlling flow of pressurized gas to and from a pressurized gas container and a second gas flow control unit for controlling flow of gas from a high pressure gas source to the container, wherein the first gas flow control unit comprises: a first valve housing for mounting the first gas flow control unit in gas flow communication with an interior of the container, the first valve housing having a first gas flow path; and a first valve located in the first gas flow path to open and close the first gas flow path which, in use, is biased in a closed position;
and wherein the second gas flow control unit comprises: a second valve housing for mounting the second gas flow control unit in gas flow communication with the gas source, the second valve housing having a second gas flow path; and a second valve located in the second gas flow path to open and close the second gas flow path which, in use, is biased in a closed position; the assembly further comprising actuating means for co-operatively opening the first and second valves when the first and second gas flow control units are brought into compressed engagement, wherein the actuating means comprises a gas flow path located therethrough to provide gas flow communication between the first and second gas flow paths.
Yet another embodiment of the present invention provides an apparatus for filling a pressurized gas container having a first gas flow control unit comprising: a first valve housing for mounting the first gas flow control unit in gas flow communication with an interior of the container, the first valve housing having a first gas flow path; a first valve located in the first gas flow path to open and close the first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open the first valve and having a first surface, the apparatus comprising: a second gas flow control unit comprising: a second valve housing for mounting the second gas flow control unit in gas flow communication with a high pressure gas source, the second 6a valve housing having a second gas flow path; a second valve located in the second gas flow path to open and close the second gas flow path which, in use, is biased in a closed position; a second insert being movable to open the second valve and having a second surface for engagement with the first surface of the first insert; conduit means for supplying pressurized gas from the high pressure gas source to the second gas flow control unit; and means for providing compressed engagement between the second gas flow control unit and the co-operating first gas flow control unit of the container; wherein gas enters the container via the conduit means, the second gas flow control unit and the first gas flow control unit when the first and second gas flow control units are brought into compressed engagement and the first and second surfaces of the first and second inserts engage to move their respective valves to open positions.
A still further embodiment of the present invention provides an apparatus for filling a pressurized gas container having a first gas flow control unit comprising: a first valve housing for mounting the first gas flow control unit in gas flow communication with an interior of the container, the first valve housing having a first gas flow path; a first valve located in the first gas flow path to open and close the path which, in use, is biased in a closed position, and a first insert being movable to open the first valve and having a first surface, the apparatus comprising: a second gas flow control unit comprising: a second valve housing for mounting the second gas flow control unit in gas flow communication with a high pressure gas source, the second valve housing having a second gas flow path; a second valve located in the second gas flow path to open and close the second gas flow path which, in use, is biased in a closed position; and a 6b second insert being movable to open the second valve and having a second surface for engagement with the first surface of the first insert; the second gas flow control unit being movable from a first position in which the second gas flow control unit is disengaged from the first gas flow control unit to a second position in which the second gas flow control unit is in compressed engagement with the first gas flow control unit; conduit means for supplying pressurized gas to the second gas flow control unit; means for reducing pressure of the gas located upstream of the second gas flow control unit; and means for moving the second gas flow control unit between the first position and the second position; wherein gas enters the container via the conduit means, the second gas flow control unit and the first gas flow control unit when the first and second gas flow control units are brought into compressed engagement and the first and second surfaces of the first and second inserts are engaged to move their respective valves to open positions.
In accordance with yet another embodiment of the present invention there is provided a pressurized gas cylinder having an outlet in which is mounted a first gas control unit comprising: a first valve housing for mounting the first gas flow control unit in gas flow communication with an interior of the cylinder, the first valve housing having a first gas flow path; a first valve located in the first gas flow path to open and close the first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open the first valve and having a first surface, for engagement with a nozzle or a second surface of a second insert of a second gas flow control valve mounted in gas flow communication with a high pressure gas source.
6c Yet another embodiment provides a system for filling pressurized gas cylinders comprising: apparatus comprising: a second gas flow control unit comprising: a second valve housing for mounting the second gas flow control unit in gas flow communication with a high pressure gas source, the second valve housing having a second gas flow path; a second valve located in the second gas flow path to open and close the second gas flow path which, in use, is biased in a closed position; and a second insert being movable to open the second valve and having a second surface; conduit means for supplying pressurized gas from the high pressure gas source to the second gas flow control unit; and means for providing compressed engagement between the second gas flow control unit and a co-operating first gas flow control unit of a cylinder;
and a plurality of pressurized gas cylinders, each cylinder having an outlet in which is mounted a first gas control unit comprising: a first valve housing for mounting the first gas flow control unit in gas flow communication with an interior of the cylinder, the first valve housing having a first gas flow path; a first valve located in the first gas flow path to open and close the first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open the first valve and having a first surface for engagement with the second surface of the second insert of the second gas flow control valve, wherein gas enters the cylinder via the conduit means, the second gas flow control unit and the first gas flow control unit when the first and second gas flow control units are brought into compressed engagement and the first and second surfaces of the first and second inserts engage to move their respective valves to open positions.
A further embodiment of the present invention provides a method of filling a pressurized gas container from a source of 6d high pressure gas comprising: providing a first gas flow control unit in gas flow communication with a pressurized gas container, the first gas flow control unit comprising: a first valve housing for mounting the first gas flow control unit in gas flow communication with an interior of the container, the first valve housing having a first gas flow path; a first valve located in the first gas flow path to open and close the first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open the first valve and having a first surface; providing a second gas flow control unit in gas flow communication with a source of high pressure gas, the second gas flow control unit comprising: a second valve housing for mounting the second gas flow control unit in gas flow communication with the gas source, the second valve housing having a second gas flow path; a second valve located in the second gas flow path to open and close the second gas flow path which, in use, is biased in a closed position; and a second insert being movable to open the second valve and having a second surface for engagement with the first surface of the first insert of the first gas flow control unit; and providing compressed engagement between the first gas flow control unit and the second gas flow control unit such that the first and second surfaces of the first and second inserts engage to move their respective valves to open positions.
The valve assembly of the present invention allows low pressure gas containers, such as cylinders,. to be re-filled without having to remove the gas flow control units and without having to use tools to form mechanical joints. In other words, the same gas flow control unit is used to dispense gas from the container as is used to refill the container.
6e During transfill using this assembly, the valve on a pressurized container may be cooperatively opened with the valve of the high-pressure gas source using a lever action.
The actuating means for cooperatively opening the first and second valves may have any suitable form provided it has a path along which gas may flow. In one arrangement, the means is a single insert having a body capable of opening both the first and second valves. However, in a preferred embodiment, the actuating means comprises a first insert having a body with a first surface and a second insert having a body with a second surface wherein the first and second surfaces engage to move their respective valves to the open positions. In this arrangement, the body of each insert has a gas flow path that comes into gas flow communication when the means is operated.
The first surface may be provided by a tapered portion of the first insert and the second surface may be provided by, for example, a correspondingly flared portion of the second insert or at least one ridge that engages the tapered surface. In a preferred embodiment, the first surface is provided by a flange mounted on the first insert and the second surface is provided by an end wall of the second insert.
The first valve may be any type of valve that can remain biased in the closed position by, for example, the pressure of the gas within the cylinder. It is a preferred embodiment of the present invention that the first valve is a poppet-valve having a pin extended through an aperture defined by an annular flange provided perpendicularly on the inside wall of the first valve housing and wherein the actuating means acts directly on the pin of the poppet-valve.
It is also a preferred embodiment of the present invention that the second valve is a poppet-valve having a pin extended through an aperture defined by an annular flange provided perpendicularly on the inside wall of the second valve housing and wherein the actuating means acts directly on the pin of the poppet-valve.
Poppet valves can be additionally biased in the closed position using a resilient member acting thereon. Preferably, the resilient member is a compression spring.
Preferably, the valve assembly further comprises means to prevent the removal of the actuating means from the valve housings. In one preferred embodiment, a pin extends perpendicularly from the interior wall of the valve housing into a cavity in the body of the first or second insert of the actuating means.
As a safety precaution, the second valve housing may comprise an emergency pressure release device such as a bursting disc andlor relief valve.
A container comprising the first gas flow control unit of the invention may further comprise a nozzle for controlling the direction of flow of gas dispensed from the container. In a preferred arrangement of this embodiment, the _g_ container may further comprise a nozzle guard for protecting the nozzle from accidental activation, said guard being mountable on the first gas flow control unit.
In a second aspect of the present invention, there is provided apparatus for filling a pressurized gas container comprising at least one pressurized gas source;
conduit means in gas flow communication with the pressurized gas source;
a second control unit (3) as defined in Claim 1 being connected to said conduit means; and means for providing compressed engagement between said second control unit (3) and cooperating first control unit of the valve assembly as defined by the first aspect of the present invention;
wherein gas enters the container (36) from the pressurized gas source via the conduit means and the valve assembly (1, 3) when the first and second control units are brought into compressed engagement.
In a third aspect of the present invention, there is provided a pressurized gas cylinder having an outlet in which is mounted a first control unit as defined in the first aspect of the present invention.
In a fourth aspect of the present invention, there is provided a system for filling pressurized gas cylinders comprising:
apparatus according to the first aspect of the present invention; and a plurality of pressurized gas cylinders as defined in the third aspect of the present invention.
In a fifth aspect of the present invention, there is provided a method of filling a low pressure gas container comprising;
_g_ providing a valve assembly (1, 3) as claimed in any one of Claims 1 to 7 in gas flow communication with a low pressure gas container (36) and a high pressure gas source; and providing compressed engagement between the first control unit (1 ) and the second control unit (3) of the valve assembly.
It is preferred that this method is used to fill pressurized gas cylinders with helium gas. Further, in a preferred arrangement, the first and second gas control units are brought into compressed engagement by using a lever action.
In use, a cylinder having a first gas control unit according to the invention is placed in a filling station having a transfill actuation system. A second gas flow control unit is in gas flow communication with a high-pressure gas source. In a preferred arrangement, the second control unit is lowered using the transfill actuation system until it mates with the first control unit mounted on the cylinder.
The second control unit may be lowered using any suitable means, for example, by moving a handle through a shaft, spur gear and rack. However, other means, such as a screwjack or pneumatic or hydraulic pistons, may also be used.
Once the gas control units are engaged, they are compressed together. The first amd second valves are cooperatively forced open against the bias of the gas pressure (and optionally the resilient member) in the container by the actuating means and the high pressure gas source respectively thereby forming a continuous gas flow path from the high pressure gas source, through the second valve, along the gas flow path of the body of the actuating means, through the first valve and into the interior of the container.
Gas flows from the high pressure gas source through a pressure-reducing valve or "regulator", through the second gas flow control unit and through the first gas flow control unit to the container. The regulator reduces the gas pressure from the pressure in the high pressure gas source to the P7879GB - 07!00 required pressure for the container. Flow stops once the pressure in the container reaches the required pressure. Once the second control unit is brought out of compressed engagement with the first control unit, the container is immediately ready for use.
BRIEF DESCRIPTION OF THE DRAWINGS:
The following is a description by way of example only and with reference to the accompanying drawings of presently preferred embodiments of the invention.
In the drawings Figure 1 is an exploded view of a gas flow control unit for use with a pressurized gas container;
Figure 2 is an exploded view of a gas flow control unit for use with a high-pressure gas source;
Figure 3 is a cross-sectional view of the gas flow control unit of the container in compressed engagement with the gas flow control unit of the high pressure gas source;
Figure 4a is an overhead, cross-sectional view of the spur-gear-and-rack arrangement of the transfill actuation system; and Figure 4b is a cross-sectional view of the transfill actuation system through the plane indicated by line AA shown in Figure 4a.
DETAILED DESCRIPTION OF THE DRAWINGS
Referring to Figures 1 and 3, the gas flow control unit (1 ) comprises valve-housing (2) having a gas flow path (4) located therethrough. The valve housing (2) also has a support groove (5) into which can be inserted a support flange (109) mounted on a transfill actuation system (see Figure 4b). A poppet valve (6) having a pin (8) is located in the valve housing (2) with the pin (8) extending through the hole in an O-ring (10) and an aperture (12) formed by an annular flange (14) on the interior wall of the housing (2). In use, the poppet valve (6) remains in the closed position because the pressure of the gas in the container forces the body (16) of the valve against the O-ring thereby isolating the gas within the container.
The poppet valve (6) may be additionally biased in the closed position using a resilient member such as a compression spring (18). The spring (18) is retained in position by a locking screw (20), which is drilled to provide a gas flow path (21 ).
An insert (22) has a tapered portion (24) and an annular flange (26).
Importantly, the insert (22) also has a bore (28). The insert (22) is located within the valve housing (2) and is in contact with the pin (8) of the poppet valve (6).
The insert (22) also has a groove (30) into which the end of the pin (32) may be inserted so as to prevent the removal of the insert (22) from the valve housing (2).
An O-ring (33) is used to provide a seal between the insert (22) and the valve housing (2).
A nozzle (34) may be attached to the tapered portion (24) of the insert (22).
In use, when the nozzle (34) is depressed, it forms a gas-tight seal with the tapered portion (24) of the insert (22). This can be achieved by providing a flared portion inside the nozzle that corresponds with the tapered portion of the insert (22). The insert (22) is forced against the pin (8) of the poppet valve (6), which is pushed open against the pressure of the gas in the container and against the compression spring (18). Gas flows from the interior of the container (36), through the path (21 ) and the valve (6), through the insert (22) and along the bore (28) and is dispensed from the nozzle (34). When the nozzle (34) is released, the valve (6) is closed by a combination of the pressure of the remaining gas in the container (36) and the release of the compression spring (18). The remaining gas in the container is thereby isolated.
The gas flow control unit may also comprise a nozzle guard (37), which is attached to the valve housing (2) and protects the nozzle (34) from accidental activation. A pin (32) may extend through nozzle guard (37) and the valve housing (2) in order to prevent the removal of the insert (22).
Referring to Figures 2 and 3, the gas flow control unit (3) in gas flow communication with the high pressure gas source (not shown) comprises a valve-housing (38) having a gas flow path (40). The housing also comprises two guide paths (74, 76), in each of which is located a guide shaft (not shown) when the housing is incorporated in a transfill actuation system. A poppet valve (42), located within the path (40), has a pin (46) extending from body (44) through an O-ring (48) and an aperture (50) formed by an annular flange (52) provided on the interior wall of the valve housing (38). The pressure of the gas from the high-pressure gas source forces the body (44) of the valve (42) against O-ring (48) thereby isolating the source of the gas. A compression spring (51 ) is used to additionally bias the valve (42) in the closed position and is retained in position using a screw (53) and a nipple (54):
An insert (56) is located within the housing (38) and the O-ring (58) forms a gas tight seal between the insert (56) and the interior wall of the housing (38). The insert (56) has a bore (60) and is in contact with the pin (46) of the poppet valve (42). The movement of the insert (56) relative to the housing (38) is restricted using a pin (62), which extends through the housing (38) into a groove (64) provided on the insert (56). The housing (38) further comprises an emergency pressure relief valve comprising a bursting disc (68) located in a bore (66).
The relief valve is fitted in pipework between the nipple (54) and a pressure regulator (not shown) from the high-pressure gas source.
Figure 3 depicts the first gas flow control unit (1 ) in compressed engagement with the second gas flow control unit (3). Surface (72) of insert (56) acts on flange (26) of insert (22). In the compressed position shown, a continuous gas flow path (40, 50; 60, 28, 12, 4) is created allowing gas to flow from the source of high pressure compressed gas into the container (36).
In use, the gas flow control unit (3) of the high-pressure gas source is brought into compressed engagement with the gas flow control unit (1 ) on the container (36). The insert (56) fits over the insert (22) and a gas-tight seal is formed using an O-ring (70). The surface (72) of the end portion of the insert (56) engages the flange (26) of the insert (22). The two control units are brought into compressed engagement using a transfill actuation system that operates by a lever action provided by a handle, a screwjack or a piston (pneumatic or hydraulic). The compressed engagement causes the inserts to move relative to the valve housings thereby substantially simultaneously opening the first and second valves of the valve assembly. Once the valves are open, gas flows from the high-pressure gas source, through the valve assembly to the interior of the container.
Referring to Figures 4a and 4b, support frame (78) is fixedly mounted to a suitable support surface (not shown) such as a pressurized gas cylinder or a wall.
The shaft (80) is rotatably mounted (along its longitudinal axis) on the support frame (78). A spur gear (82) is fixedly mounted on the shaft (80) via a pin (84) that extends through a hub (86) of the spur gear into the shaft (80). Lever handle {88) is mounted on the shaft {80) via connector (90) and the mounting pins (106) and (107) such that the lever handle, connector and shaft form a crank. The spur gear (82) turns when the lever handle (88) is moved up or down.
A spur rack (92) is fixedly mounted on the housing (38) of the second gas flow control unit (3) and engages the spur gear (82). One end of each guide shaft (94) and (96) is fixedly mounted in a locating hole in the support frame (78) and the other end is fixedly mounted in a locating hole in support flanges (98) and (100) respE;ctively. The guide paths (74) and (76) of the housing (38) of second gas flow control unit (3) are mounted on the guide shafts (94) and (96) respectively of support frame (78). The second gas flow control unit (3) moves relative to the support frame (78) along the guide shafts (94) and (96) as a result of the lever action of the handle (88).
When the first and second control units are in compressed engagement, the pressure of the gas flowing from the high pressure gas source to the pressurized gas cylinder acts to force the control units apart. Rather than have the operator hold the handle (88) down for the duration of the transfilling operation, the support frame (78) is provided with a locking flange (102) that acts as a downlock for the handle (88). To lock the handle (88) down, the handle (88) is moved laterally around mounting pin (106) to compress spring (104). The handle (88) is then rotated around shaft (80) until it is below the level of locking flange (102). When handle (88) is released, the spring (104) forces the handle (88) under the locking flange (102). To unlock the system, the series of steps is simply reversed.
The locking flange (102) has a screw (108) that is adjustable and, thus, the maximum level to which the second control unit (3) may be lowered is adjustable.
Referring now to Figure 4b, when the lever handle (not shown) is rotated, shaft (80) rotates around its longitudinal axis thereby rotating the spur gear (82).
The spur gear (82) engages the spur rack (92) and, thus, rotation of the spur gear (82) causes the spur rack (92) to move up or down depending on the direction of rotation of the spur gear (82). The housing (38) of the second control unit (3) is fixedly mounted on the spur rack (92) and therefore moves relative to the support frame (78) with the spur rack (92). In this way, the insert (56) of the second control unit (3) can be brought into compressed engagement with the insert (22) of the first control unit (1 ) mounted on pressurized gas cylinder (36).
A cylinder (36) having a first gas flow control unit (1 ) is positioned in the transfill actuation system so that a support flange (109), provided on the support frame; (78), is located within the groove (5) of the first control unit (1 ).
The support flange (109) thereby holds the cylinder in position while the second control unit (3) is brought into compressed engagement with the first control unit (1 ).
It will be appreciated that the invention is not restricted to the details described above with reference to the preferred embodiments but that numerous modifications and variations can be made without departing from the scope of the invention as defined in the following claims.
The present invention relates generally to the field of storing and dispensing pressurized gas. In particular, the present invention relates to a valve assembly for use with a pressurized gas container filling system and a method of filling a pressurized gas container such as a low-pressure gas cylinder.
BACKGROUND OF THE INVENTION
The term "gas" is used herein to describe not only the gaseous state of a substance but also an aerosol and a vapour associated with a liquified gas.
Gases are conveniently stored and transported in a pressurized state, often in a pressurized gas cylinder. For many domestic (i.e. non-industrial) applications, it is convenient that the pressurized gas cylinder be portable. For example, a scuba diver needs to have a portable supply of breathable gas in order to remain unde,~nrater for any length of time and a paramedic needs a portable supply of oxygen for administration to an injured person at the scene of an accident. In addition, DIY welding gases are also stored in portable cylinders as too is carbon dioxide in fire extinguishers.
A further example of a domestic application of pressurized gas is the use of pressurized "lighter-than-air" gas to fill balloons. Suitable "lighter-than-air" gases include helium or "balloon gas" (predominately helium). Usually, the balloons are referred to as helium-filled balloons.
In recent years, there has been a marked increase in the demand for helium-filled balloons. Such balloons are used for example as party _2_ decorations, children's' toys or promotional and advertising materials. As a result of this demand, helium-filled balloons are widely available from many different retail outlets. These outlets may specialize in other goods but sell helium-filled balloons as a side-line or may specialize in selling helium-filled balloons, e.g. stand-alone stalls located in shopping malls or high streets.
In addition, some outlets rent cylinders of pressurized balloon gas to the public. A rented cylinder would then be taken to the place where large numbers of helium-filled balloons are required so that the balloons may be filled in situ.
In such cases, the cylinders would be transported using a vehicle such as the family car.
Industry also uses cylinders of pressurized gases. For example, where an inert atmosphere is required, the atmosphere could be provided by an unreactive (or "inert") gas, stored in and dispensed from a pressurized gas cylinder.
Whilst industrial cylinders tend to hold more gas than domestic cylinders, portable cylinders in general tend to have a small storage capacity and, thus, quickly become empty and need replacing frequently.
One solution to this problem is to provide disposable containers. Gas Cont,~iner Services Limited of Roadway No. 7, Colwick Industrial Estate, Nottingham, NG4 2JW, United Kingdom provides a helium-filled balloon kit comprising a disposable helium tank under the trade mark BALLOON TIME.
More commonly, portable pressurized gas cylinders are designed to be refillable from a high-pressure gas source. Two options exist in this regard.
First, the empty cylinders may be collected and taken to a central filling depot for re-filling. The second option is to refill the cylinders at their place of use or sale. In this connection, the process of transferring gas from a high-pressure cylinder to a low-pressure cylinder is known as "transfilling".
The first option is currently the preferred option for the re-filling of cylinders for industrial use in which the cylinders are transported to the filling depot using a purpose built lorry. Unfortunately, for domestic applications (where the quantity of gas in a single cylinder is less than that for industrial applications resulting in shorter periods between cylinder refills), this approach is less attractive as it requires the transportation of large quantities of cylinders on a frequent basis, which can be expensive and time-consuming.
When a pressurized cylinder is re-filled at the filling depot, the outlet of the cylinder is connected to a filling manifold that is, in turn, connected via a flexible hose to a source of high-pressure gas. In this case, the source of high-pressure gas is a compressor or pump and vaporizer in gas flow communication with a gas source. A valve on the cylinder outlet is opened and the cylinder is charged with gas from the high-pressure gas source to a pre-set pressure by opening a feed valve. On completion, the feed valve is closed first and then the cylinder valve is closed. The filling manifold is then vented using a vent valve and the flexible hose is disconnected. This specific sequence of steps is repeated each time a cylinder is refilled. This is not only time-consuming but also requires specialist training.
A gas flow control device must then be fitted to the outlet of the cylinder before the cylinder is able to dispense gas for its intended application. For exam ple, with cylinders of balloon gas, a regulator and balloon filling attachment must be fastened to the cylinder outlet before the cylinder may be used to fill balloons.
West Winds of 33672 Pin Oak Parkway, Avon Lake, Ohio 44012, USA
provides a transfill system that allows high pressure helium gas cylinders to be refilled at retail premises using a flexible hose connected to a supply of higher pressure helium gas. The higher-pressure helium gas supply can take the form of more than one cylinder linked in series. The system uses the same sequence of connections, valve operations and disconnections as used in connection with the depot transfill system described above. Further, a gas flow control unit needs to be connected to a re-filled cylinder before gas can be safely dispensed from the cylinder to fill balloons.
Both of these systems require a specific sequence of steps in order to safely transfill a pressurized gas cylinder from a higher-pressure gas source and specialist training is required. If the valves are not operated in the correct sequence, the receiving cylinder could be under or over-filled or high-pressure gas could be released. Further, the West Winds system is designed to transfill high-pressure cylinders from a source of higher-pressure gas. If a low-pressure cylinder is mistakenly transfilled using the West Winds system, then there is a risk that the cylinder may explode causing injury to the user. In addition, both systems require the removal of a gas flow control unit from the cylinder prior to transfill and the reconnection of a gas flow control unit after the cylinder has been refilled.
These extra steps significantly increase the time taken to refill a cylinder ready for use and may require specialist training.
Widget World of Blackpole Trading Estate East, Blackpole Road, Worcester, WR3 8SG, United Kingdom provides a high pressure helium gas cylinder system for filling balloons under the trade mark MIDGET WIDGET. The system comprises a high-pressure helium gas cylinder with a valve that acts to secure the contents of the cylinder and regulates the pressure of the gas within the cylinder. The system has <~n operating handle, which operates the valve and which acts as a balloon-fillinc~ adapter. The handle is transported separately from the cylinder and is fitted by the end-user. The cylinder of this system must be returned to the depot for re-filling as it is charged to high pressure. It is not possible to refill the cylinder at the retail outlet.
There is a need, therefore, for a transfill system that can be used to refill a pressurized gas cylinder in situ, i.e. at the place at which the cylinder is used or sold, rather than having to transport the empty cylinder to a refilling depot.
There is also a need to simplify the sequence of steps taken to refill a cylinder so that no specialist training is required and so that the overall length of time taken to fill a cylinder is reduced.
SUMMARY OF THE INVENTION
It has been found that these needs have, at least in part, been fulfilled using the present invention. The 5 invention provides a transfill system that allows pressurized gas cylinders to be refilled in situ in a safe, efficient and cost effective manner. The present invention is simple to use, requires no mechanical skills and minimal training. In addition, the valve on the cylinder can be used not only to transfill the cylinder but also to dispense gas from the cylinder. The transfill process is simplified, as the valve on the cylinder does not need to be replaced before transfilling.
The valve on the cylinder is simply brought into compressed engagement with the valve of the source of high-pressure gas.
This reduces the time taken to refill a cylinder and the necessity for tools and specialist training. In this connection, it may be necessary to use a tool to remove a nozzle from the valve of the cylinder before the cylinder may be transfilled. However, tools to remove the valve from the cylinder are not required.
As the transfill process is simplified using the present invention, the risk of an accident resulting from the incorrect application of the transfill sequence of steps is reduced. The present invention also makes it difficult for users to tamper with and/or bypass the protective systems.
In accordance with one embodiment of the present invention there is provided a valve assembly comprising a first gas flow control unit for controlling flow of pressurized gas to and from a pressurized gas container and a second gas flow control unit for controlling flow of gas from a high pressure gas source to the container, wherein the first gas flow control unit comprises: a first valve housing for mounting the first gas flow control unit in gas flow communication with an interior of the container, the first valve housing having a first gas flow path; and a first valve located in the first gas flow path to open and close the first gas flow path which, in use, is biased in a closed position;
and wherein the second gas flow control unit comprises: a second valve housing for mounting the second gas flow control unit in gas flow communication with the gas source, the second valve housing having a second gas flow path; and a second valve located in the second gas flow path to open and close the second gas flow path which, in use, is biased in a closed position; the assembly further comprising actuating means for co-operatively opening the first and second valves when the first and second gas flow control units are brought into compressed engagement, wherein the actuating means comprises a gas flow path located therethrough to provide gas flow communication between the first and second gas flow paths.
Yet another embodiment of the present invention provides an apparatus for filling a pressurized gas container having a first gas flow control unit comprising: a first valve housing for mounting the first gas flow control unit in gas flow communication with an interior of the container, the first valve housing having a first gas flow path; a first valve located in the first gas flow path to open and close the first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open the first valve and having a first surface, the apparatus comprising: a second gas flow control unit comprising: a second valve housing for mounting the second gas flow control unit in gas flow communication with a high pressure gas source, the second 6a valve housing having a second gas flow path; a second valve located in the second gas flow path to open and close the second gas flow path which, in use, is biased in a closed position; a second insert being movable to open the second valve and having a second surface for engagement with the first surface of the first insert; conduit means for supplying pressurized gas from the high pressure gas source to the second gas flow control unit; and means for providing compressed engagement between the second gas flow control unit and the co-operating first gas flow control unit of the container; wherein gas enters the container via the conduit means, the second gas flow control unit and the first gas flow control unit when the first and second gas flow control units are brought into compressed engagement and the first and second surfaces of the first and second inserts engage to move their respective valves to open positions.
A still further embodiment of the present invention provides an apparatus for filling a pressurized gas container having a first gas flow control unit comprising: a first valve housing for mounting the first gas flow control unit in gas flow communication with an interior of the container, the first valve housing having a first gas flow path; a first valve located in the first gas flow path to open and close the path which, in use, is biased in a closed position, and a first insert being movable to open the first valve and having a first surface, the apparatus comprising: a second gas flow control unit comprising: a second valve housing for mounting the second gas flow control unit in gas flow communication with a high pressure gas source, the second valve housing having a second gas flow path; a second valve located in the second gas flow path to open and close the second gas flow path which, in use, is biased in a closed position; and a 6b second insert being movable to open the second valve and having a second surface for engagement with the first surface of the first insert; the second gas flow control unit being movable from a first position in which the second gas flow control unit is disengaged from the first gas flow control unit to a second position in which the second gas flow control unit is in compressed engagement with the first gas flow control unit; conduit means for supplying pressurized gas to the second gas flow control unit; means for reducing pressure of the gas located upstream of the second gas flow control unit; and means for moving the second gas flow control unit between the first position and the second position; wherein gas enters the container via the conduit means, the second gas flow control unit and the first gas flow control unit when the first and second gas flow control units are brought into compressed engagement and the first and second surfaces of the first and second inserts are engaged to move their respective valves to open positions.
In accordance with yet another embodiment of the present invention there is provided a pressurized gas cylinder having an outlet in which is mounted a first gas control unit comprising: a first valve housing for mounting the first gas flow control unit in gas flow communication with an interior of the cylinder, the first valve housing having a first gas flow path; a first valve located in the first gas flow path to open and close the first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open the first valve and having a first surface, for engagement with a nozzle or a second surface of a second insert of a second gas flow control valve mounted in gas flow communication with a high pressure gas source.
6c Yet another embodiment provides a system for filling pressurized gas cylinders comprising: apparatus comprising: a second gas flow control unit comprising: a second valve housing for mounting the second gas flow control unit in gas flow communication with a high pressure gas source, the second valve housing having a second gas flow path; a second valve located in the second gas flow path to open and close the second gas flow path which, in use, is biased in a closed position; and a second insert being movable to open the second valve and having a second surface; conduit means for supplying pressurized gas from the high pressure gas source to the second gas flow control unit; and means for providing compressed engagement between the second gas flow control unit and a co-operating first gas flow control unit of a cylinder;
and a plurality of pressurized gas cylinders, each cylinder having an outlet in which is mounted a first gas control unit comprising: a first valve housing for mounting the first gas flow control unit in gas flow communication with an interior of the cylinder, the first valve housing having a first gas flow path; a first valve located in the first gas flow path to open and close the first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open the first valve and having a first surface for engagement with the second surface of the second insert of the second gas flow control valve, wherein gas enters the cylinder via the conduit means, the second gas flow control unit and the first gas flow control unit when the first and second gas flow control units are brought into compressed engagement and the first and second surfaces of the first and second inserts engage to move their respective valves to open positions.
A further embodiment of the present invention provides a method of filling a pressurized gas container from a source of 6d high pressure gas comprising: providing a first gas flow control unit in gas flow communication with a pressurized gas container, the first gas flow control unit comprising: a first valve housing for mounting the first gas flow control unit in gas flow communication with an interior of the container, the first valve housing having a first gas flow path; a first valve located in the first gas flow path to open and close the first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open the first valve and having a first surface; providing a second gas flow control unit in gas flow communication with a source of high pressure gas, the second gas flow control unit comprising: a second valve housing for mounting the second gas flow control unit in gas flow communication with the gas source, the second valve housing having a second gas flow path; a second valve located in the second gas flow path to open and close the second gas flow path which, in use, is biased in a closed position; and a second insert being movable to open the second valve and having a second surface for engagement with the first surface of the first insert of the first gas flow control unit; and providing compressed engagement between the first gas flow control unit and the second gas flow control unit such that the first and second surfaces of the first and second inserts engage to move their respective valves to open positions.
The valve assembly of the present invention allows low pressure gas containers, such as cylinders,. to be re-filled without having to remove the gas flow control units and without having to use tools to form mechanical joints. In other words, the same gas flow control unit is used to dispense gas from the container as is used to refill the container.
6e During transfill using this assembly, the valve on a pressurized container may be cooperatively opened with the valve of the high-pressure gas source using a lever action.
The actuating means for cooperatively opening the first and second valves may have any suitable form provided it has a path along which gas may flow. In one arrangement, the means is a single insert having a body capable of opening both the first and second valves. However, in a preferred embodiment, the actuating means comprises a first insert having a body with a first surface and a second insert having a body with a second surface wherein the first and second surfaces engage to move their respective valves to the open positions. In this arrangement, the body of each insert has a gas flow path that comes into gas flow communication when the means is operated.
The first surface may be provided by a tapered portion of the first insert and the second surface may be provided by, for example, a correspondingly flared portion of the second insert or at least one ridge that engages the tapered surface. In a preferred embodiment, the first surface is provided by a flange mounted on the first insert and the second surface is provided by an end wall of the second insert.
The first valve may be any type of valve that can remain biased in the closed position by, for example, the pressure of the gas within the cylinder. It is a preferred embodiment of the present invention that the first valve is a poppet-valve having a pin extended through an aperture defined by an annular flange provided perpendicularly on the inside wall of the first valve housing and wherein the actuating means acts directly on the pin of the poppet-valve.
It is also a preferred embodiment of the present invention that the second valve is a poppet-valve having a pin extended through an aperture defined by an annular flange provided perpendicularly on the inside wall of the second valve housing and wherein the actuating means acts directly on the pin of the poppet-valve.
Poppet valves can be additionally biased in the closed position using a resilient member acting thereon. Preferably, the resilient member is a compression spring.
Preferably, the valve assembly further comprises means to prevent the removal of the actuating means from the valve housings. In one preferred embodiment, a pin extends perpendicularly from the interior wall of the valve housing into a cavity in the body of the first or second insert of the actuating means.
As a safety precaution, the second valve housing may comprise an emergency pressure release device such as a bursting disc andlor relief valve.
A container comprising the first gas flow control unit of the invention may further comprise a nozzle for controlling the direction of flow of gas dispensed from the container. In a preferred arrangement of this embodiment, the _g_ container may further comprise a nozzle guard for protecting the nozzle from accidental activation, said guard being mountable on the first gas flow control unit.
In a second aspect of the present invention, there is provided apparatus for filling a pressurized gas container comprising at least one pressurized gas source;
conduit means in gas flow communication with the pressurized gas source;
a second control unit (3) as defined in Claim 1 being connected to said conduit means; and means for providing compressed engagement between said second control unit (3) and cooperating first control unit of the valve assembly as defined by the first aspect of the present invention;
wherein gas enters the container (36) from the pressurized gas source via the conduit means and the valve assembly (1, 3) when the first and second control units are brought into compressed engagement.
In a third aspect of the present invention, there is provided a pressurized gas cylinder having an outlet in which is mounted a first control unit as defined in the first aspect of the present invention.
In a fourth aspect of the present invention, there is provided a system for filling pressurized gas cylinders comprising:
apparatus according to the first aspect of the present invention; and a plurality of pressurized gas cylinders as defined in the third aspect of the present invention.
In a fifth aspect of the present invention, there is provided a method of filling a low pressure gas container comprising;
_g_ providing a valve assembly (1, 3) as claimed in any one of Claims 1 to 7 in gas flow communication with a low pressure gas container (36) and a high pressure gas source; and providing compressed engagement between the first control unit (1 ) and the second control unit (3) of the valve assembly.
It is preferred that this method is used to fill pressurized gas cylinders with helium gas. Further, in a preferred arrangement, the first and second gas control units are brought into compressed engagement by using a lever action.
In use, a cylinder having a first gas control unit according to the invention is placed in a filling station having a transfill actuation system. A second gas flow control unit is in gas flow communication with a high-pressure gas source. In a preferred arrangement, the second control unit is lowered using the transfill actuation system until it mates with the first control unit mounted on the cylinder.
The second control unit may be lowered using any suitable means, for example, by moving a handle through a shaft, spur gear and rack. However, other means, such as a screwjack or pneumatic or hydraulic pistons, may also be used.
Once the gas control units are engaged, they are compressed together. The first amd second valves are cooperatively forced open against the bias of the gas pressure (and optionally the resilient member) in the container by the actuating means and the high pressure gas source respectively thereby forming a continuous gas flow path from the high pressure gas source, through the second valve, along the gas flow path of the body of the actuating means, through the first valve and into the interior of the container.
Gas flows from the high pressure gas source through a pressure-reducing valve or "regulator", through the second gas flow control unit and through the first gas flow control unit to the container. The regulator reduces the gas pressure from the pressure in the high pressure gas source to the P7879GB - 07!00 required pressure for the container. Flow stops once the pressure in the container reaches the required pressure. Once the second control unit is brought out of compressed engagement with the first control unit, the container is immediately ready for use.
BRIEF DESCRIPTION OF THE DRAWINGS:
The following is a description by way of example only and with reference to the accompanying drawings of presently preferred embodiments of the invention.
In the drawings Figure 1 is an exploded view of a gas flow control unit for use with a pressurized gas container;
Figure 2 is an exploded view of a gas flow control unit for use with a high-pressure gas source;
Figure 3 is a cross-sectional view of the gas flow control unit of the container in compressed engagement with the gas flow control unit of the high pressure gas source;
Figure 4a is an overhead, cross-sectional view of the spur-gear-and-rack arrangement of the transfill actuation system; and Figure 4b is a cross-sectional view of the transfill actuation system through the plane indicated by line AA shown in Figure 4a.
DETAILED DESCRIPTION OF THE DRAWINGS
Referring to Figures 1 and 3, the gas flow control unit (1 ) comprises valve-housing (2) having a gas flow path (4) located therethrough. The valve housing (2) also has a support groove (5) into which can be inserted a support flange (109) mounted on a transfill actuation system (see Figure 4b). A poppet valve (6) having a pin (8) is located in the valve housing (2) with the pin (8) extending through the hole in an O-ring (10) and an aperture (12) formed by an annular flange (14) on the interior wall of the housing (2). In use, the poppet valve (6) remains in the closed position because the pressure of the gas in the container forces the body (16) of the valve against the O-ring thereby isolating the gas within the container.
The poppet valve (6) may be additionally biased in the closed position using a resilient member such as a compression spring (18). The spring (18) is retained in position by a locking screw (20), which is drilled to provide a gas flow path (21 ).
An insert (22) has a tapered portion (24) and an annular flange (26).
Importantly, the insert (22) also has a bore (28). The insert (22) is located within the valve housing (2) and is in contact with the pin (8) of the poppet valve (6).
The insert (22) also has a groove (30) into which the end of the pin (32) may be inserted so as to prevent the removal of the insert (22) from the valve housing (2).
An O-ring (33) is used to provide a seal between the insert (22) and the valve housing (2).
A nozzle (34) may be attached to the tapered portion (24) of the insert (22).
In use, when the nozzle (34) is depressed, it forms a gas-tight seal with the tapered portion (24) of the insert (22). This can be achieved by providing a flared portion inside the nozzle that corresponds with the tapered portion of the insert (22). The insert (22) is forced against the pin (8) of the poppet valve (6), which is pushed open against the pressure of the gas in the container and against the compression spring (18). Gas flows from the interior of the container (36), through the path (21 ) and the valve (6), through the insert (22) and along the bore (28) and is dispensed from the nozzle (34). When the nozzle (34) is released, the valve (6) is closed by a combination of the pressure of the remaining gas in the container (36) and the release of the compression spring (18). The remaining gas in the container is thereby isolated.
The gas flow control unit may also comprise a nozzle guard (37), which is attached to the valve housing (2) and protects the nozzle (34) from accidental activation. A pin (32) may extend through nozzle guard (37) and the valve housing (2) in order to prevent the removal of the insert (22).
Referring to Figures 2 and 3, the gas flow control unit (3) in gas flow communication with the high pressure gas source (not shown) comprises a valve-housing (38) having a gas flow path (40). The housing also comprises two guide paths (74, 76), in each of which is located a guide shaft (not shown) when the housing is incorporated in a transfill actuation system. A poppet valve (42), located within the path (40), has a pin (46) extending from body (44) through an O-ring (48) and an aperture (50) formed by an annular flange (52) provided on the interior wall of the valve housing (38). The pressure of the gas from the high-pressure gas source forces the body (44) of the valve (42) against O-ring (48) thereby isolating the source of the gas. A compression spring (51 ) is used to additionally bias the valve (42) in the closed position and is retained in position using a screw (53) and a nipple (54):
An insert (56) is located within the housing (38) and the O-ring (58) forms a gas tight seal between the insert (56) and the interior wall of the housing (38). The insert (56) has a bore (60) and is in contact with the pin (46) of the poppet valve (42). The movement of the insert (56) relative to the housing (38) is restricted using a pin (62), which extends through the housing (38) into a groove (64) provided on the insert (56). The housing (38) further comprises an emergency pressure relief valve comprising a bursting disc (68) located in a bore (66).
The relief valve is fitted in pipework between the nipple (54) and a pressure regulator (not shown) from the high-pressure gas source.
Figure 3 depicts the first gas flow control unit (1 ) in compressed engagement with the second gas flow control unit (3). Surface (72) of insert (56) acts on flange (26) of insert (22). In the compressed position shown, a continuous gas flow path (40, 50; 60, 28, 12, 4) is created allowing gas to flow from the source of high pressure compressed gas into the container (36).
In use, the gas flow control unit (3) of the high-pressure gas source is brought into compressed engagement with the gas flow control unit (1 ) on the container (36). The insert (56) fits over the insert (22) and a gas-tight seal is formed using an O-ring (70). The surface (72) of the end portion of the insert (56) engages the flange (26) of the insert (22). The two control units are brought into compressed engagement using a transfill actuation system that operates by a lever action provided by a handle, a screwjack or a piston (pneumatic or hydraulic). The compressed engagement causes the inserts to move relative to the valve housings thereby substantially simultaneously opening the first and second valves of the valve assembly. Once the valves are open, gas flows from the high-pressure gas source, through the valve assembly to the interior of the container.
Referring to Figures 4a and 4b, support frame (78) is fixedly mounted to a suitable support surface (not shown) such as a pressurized gas cylinder or a wall.
The shaft (80) is rotatably mounted (along its longitudinal axis) on the support frame (78). A spur gear (82) is fixedly mounted on the shaft (80) via a pin (84) that extends through a hub (86) of the spur gear into the shaft (80). Lever handle {88) is mounted on the shaft {80) via connector (90) and the mounting pins (106) and (107) such that the lever handle, connector and shaft form a crank. The spur gear (82) turns when the lever handle (88) is moved up or down.
A spur rack (92) is fixedly mounted on the housing (38) of the second gas flow control unit (3) and engages the spur gear (82). One end of each guide shaft (94) and (96) is fixedly mounted in a locating hole in the support frame (78) and the other end is fixedly mounted in a locating hole in support flanges (98) and (100) respE;ctively. The guide paths (74) and (76) of the housing (38) of second gas flow control unit (3) are mounted on the guide shafts (94) and (96) respectively of support frame (78). The second gas flow control unit (3) moves relative to the support frame (78) along the guide shafts (94) and (96) as a result of the lever action of the handle (88).
When the first and second control units are in compressed engagement, the pressure of the gas flowing from the high pressure gas source to the pressurized gas cylinder acts to force the control units apart. Rather than have the operator hold the handle (88) down for the duration of the transfilling operation, the support frame (78) is provided with a locking flange (102) that acts as a downlock for the handle (88). To lock the handle (88) down, the handle (88) is moved laterally around mounting pin (106) to compress spring (104). The handle (88) is then rotated around shaft (80) until it is below the level of locking flange (102). When handle (88) is released, the spring (104) forces the handle (88) under the locking flange (102). To unlock the system, the series of steps is simply reversed.
The locking flange (102) has a screw (108) that is adjustable and, thus, the maximum level to which the second control unit (3) may be lowered is adjustable.
Referring now to Figure 4b, when the lever handle (not shown) is rotated, shaft (80) rotates around its longitudinal axis thereby rotating the spur gear (82).
The spur gear (82) engages the spur rack (92) and, thus, rotation of the spur gear (82) causes the spur rack (92) to move up or down depending on the direction of rotation of the spur gear (82). The housing (38) of the second control unit (3) is fixedly mounted on the spur rack (92) and therefore moves relative to the support frame (78) with the spur rack (92). In this way, the insert (56) of the second control unit (3) can be brought into compressed engagement with the insert (22) of the first control unit (1 ) mounted on pressurized gas cylinder (36).
A cylinder (36) having a first gas flow control unit (1 ) is positioned in the transfill actuation system so that a support flange (109), provided on the support frame; (78), is located within the groove (5) of the first control unit (1 ).
The support flange (109) thereby holds the cylinder in position while the second control unit (3) is brought into compressed engagement with the first control unit (1 ).
It will be appreciated that the invention is not restricted to the details described above with reference to the preferred embodiments but that numerous modifications and variations can be made without departing from the scope of the invention as defined in the following claims.
Claims (10)
1. A valve assembly comprising a first gas flow control unit for controlling flow of pressurized gas to and from a pressurized gas container and a second gas flow control unit for controlling flow of gas from a high pressure gas source to the container, wherein the first gas flow control unit comprises:
a first valve housing for mounting said first gas flow control unit in gas flow communication with an interior of the container, said first valve housing having a first gas flow path; and a first valve located in the first gas flow path to open and close said first gas flow path which, in use, is biased in a closed position; and wherein the second gas flow control unit comprises:
a second valve housing for mounting said second gas flow control unit in gas flow communication with the gas source, said second valve housing having a second gas flow path; and a second valve located in the second gas flow path to open and close said second gas flow path which, in use, is biased in a closed position;
said assembly further comprising actuating means for co-operatively opening the first and second valves when the first and second gas flow control units are brought into compressed engagement, wherein said actuating means comprises a gas flow path located therethrough to provide gas flow communication between said first and second gas flow paths.
a first valve housing for mounting said first gas flow control unit in gas flow communication with an interior of the container, said first valve housing having a first gas flow path; and a first valve located in the first gas flow path to open and close said first gas flow path which, in use, is biased in a closed position; and wherein the second gas flow control unit comprises:
a second valve housing for mounting said second gas flow control unit in gas flow communication with the gas source, said second valve housing having a second gas flow path; and a second valve located in the second gas flow path to open and close said second gas flow path which, in use, is biased in a closed position;
said assembly further comprising actuating means for co-operatively opening the first and second valves when the first and second gas flow control units are brought into compressed engagement, wherein said actuating means comprises a gas flow path located therethrough to provide gas flow communication between said first and second gas flow paths.
2. The valve assembly according to Claim 1 wherein the actuating means for co-operatively opening the first and second valves comprises a first insert and a second insert, the first insert being moveable to open said first valve and having a first surface and the second insert being moveable to open said second valve and having a second surface wherein the first and second surfaces engage to move their respective valves to open positions.
3. The valve assembly according to Claim 1, wherein the first gas flow control unit is adapted to engage a nozzle for directing the flow of gas released from the container when the nozzle is depressed.
4. Apparatus for filling a pressurized gas container having a first gas flow control unit comprising:
a first valve housing for mounting said first gas flow control unit in gas flow communication with an interior of the container, said first valve housing having a first gas flow path;
a first valve located in the first gas flow path to open and close said first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open said first valve and having a first surface, said apparatus comprising:
a second gas flow control unit comprising:
a second valve housing for mounting said second gas flow control unit in gas flow communication with a high pressure gas source, said second valve housing having a second gas flow path;
a second valve located in the second gas flow path to open and close said second gas flow path which, in use, is biased in a closed position; and a second insert being movable to open the second valve and having a second surface for engagement with the first surface of the first insert;
conduit means for supplying pressurized gas from said high pressure gas source to said second gas flow control unit; and means for providing compressed engagement between said second gas flow control unit and said co-operating first gas flow control unit of the container;
wherein gas enters the container via the conduit means, the second gas flow control unit and the first gas flow control unit when the first and second gas flow control units are brought into compressed engagement and the first and second surfaces of the first and second inserts engage to move their respective valves to open positions.
a first valve housing for mounting said first gas flow control unit in gas flow communication with an interior of the container, said first valve housing having a first gas flow path;
a first valve located in the first gas flow path to open and close said first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open said first valve and having a first surface, said apparatus comprising:
a second gas flow control unit comprising:
a second valve housing for mounting said second gas flow control unit in gas flow communication with a high pressure gas source, said second valve housing having a second gas flow path;
a second valve located in the second gas flow path to open and close said second gas flow path which, in use, is biased in a closed position; and a second insert being movable to open the second valve and having a second surface for engagement with the first surface of the first insert;
conduit means for supplying pressurized gas from said high pressure gas source to said second gas flow control unit; and means for providing compressed engagement between said second gas flow control unit and said co-operating first gas flow control unit of the container;
wherein gas enters the container via the conduit means, the second gas flow control unit and the first gas flow control unit when the first and second gas flow control units are brought into compressed engagement and the first and second surfaces of the first and second inserts engage to move their respective valves to open positions.
5. The apparatus according to Claim 4, comprising means for reducing pressure of the gas located upstream of the second gas flow control unit.
6. The apparatus according to Claim 4, wherein the means for providing compressed engagement between the first and second gas flow control units operates using a lever action.
7. Apparatus for filling a pressurized gas container having a first gas flow control unit comprising:
a first valve housing for mounting said first gas flow control unit in gas flow communication with an interior of the container, said first valve housing having a first gas flow path;
a first valve located in the first gas flow path to open and close said path which, in use, is biased in a closed position, and a first insert being movable to open said first valve and having a first surface, said apparatus comprising:
a second gas flow control unit comprising:
a second valve housing for mounting said second gas flow control unit in gas flow communication with a high pressure gas source, said second valve housing having a second gas flow path;
a second valve located in the second gas flow path to open and close said second gas flow path which, in use, is biased in a closed position; and a second insert being movable to open the second valve and having a second surface for engagement with the first surface of the first insert;
said second gas flow control unit being movable from a first position in which said second gas flow control unit is disengaged from the first gas flow control unit to a second position in which said second gas flow control unit is in compressed engagement with the first gas flow control unit;
conduit means for supplying pressurized gas to said second gas flow control unit;
means for reducing pressure of the gas located upstream of the second gas flow control unit; and means for moving the second gas flow control unit between the first position and the second position;
wherein gas enters the container via the conduit means, the second gas flow control unit and the first gas flow control unit when the first and second gas flow control units are brought into compressed engagement and the first and second surfaces of the first and second inserts are engaged to move their respective valves to open positions.
a first valve housing for mounting said first gas flow control unit in gas flow communication with an interior of the container, said first valve housing having a first gas flow path;
a first valve located in the first gas flow path to open and close said path which, in use, is biased in a closed position, and a first insert being movable to open said first valve and having a first surface, said apparatus comprising:
a second gas flow control unit comprising:
a second valve housing for mounting said second gas flow control unit in gas flow communication with a high pressure gas source, said second valve housing having a second gas flow path;
a second valve located in the second gas flow path to open and close said second gas flow path which, in use, is biased in a closed position; and a second insert being movable to open the second valve and having a second surface for engagement with the first surface of the first insert;
said second gas flow control unit being movable from a first position in which said second gas flow control unit is disengaged from the first gas flow control unit to a second position in which said second gas flow control unit is in compressed engagement with the first gas flow control unit;
conduit means for supplying pressurized gas to said second gas flow control unit;
means for reducing pressure of the gas located upstream of the second gas flow control unit; and means for moving the second gas flow control unit between the first position and the second position;
wherein gas enters the container via the conduit means, the second gas flow control unit and the first gas flow control unit when the first and second gas flow control units are brought into compressed engagement and the first and second surfaces of the first and second inserts are engaged to move their respective valves to open positions.
8. A pressurized gas cylinder having an outlet in which is mounted a first gas control unit comprising:
a first valve housing for mounting said first gas flow control unit in gas flow communication with an interior of the cylinder, said first valve housing having a first gas flow path; a first valve located in the first gas flow path to open and close said first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open said first valve and having a first surface, for engagement with a nozzle or a second surface of a second insert of a second gas flow control valve mounted in gas flow communication with a high pressure gas source.
a first valve housing for mounting said first gas flow control unit in gas flow communication with an interior of the cylinder, said first valve housing having a first gas flow path; a first valve located in the first gas flow path to open and close said first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open said first valve and having a first surface, for engagement with a nozzle or a second surface of a second insert of a second gas flow control valve mounted in gas flow communication with a high pressure gas source.
9. A system for filling pressurized gas cylinders comprising:
apparatus comprising:
a second gas flow control unit comprising:
a second valve housing for mounting said second gas flow control unit in gas flow communication with a high pressure gas source, said second valve housing having a second gas flow path;
a second valve located in the second gas flow path to open and close said second gas flow path which, in use, is biased in a closed position; and a second insert being movable to open the second valve and having a second surface;
conduit means for supplying pressurized gas from said high pressure gas source to said second gas flow control unit; and means for providing compressed engagement between said second gas flow control unit and a co-operating first gas flow control unit of a cylinder; and a plurality of pressurized gas cylinders, each cylinder having an outlet in which is mounted a first gas control unit comprising:
a first valve housing for mounting said first gas flow control unit in gas flow communication with an interior of the cylinder, said first valve housing having a first gas flow path;
a first valve located in the first gas flow path to open and close said first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open said first valve and having a first surface for engagement with said second surface of said second insert of said second gas flow control valve, wherein gas enters the cylinder via the conduit means, the second gas flow control unit and the first gas flow control unit when the first and second gas flow control units are brought into compressed engagement and the first and second surfaces of the first and second inserts engage to move their respective valves to open positions.
apparatus comprising:
a second gas flow control unit comprising:
a second valve housing for mounting said second gas flow control unit in gas flow communication with a high pressure gas source, said second valve housing having a second gas flow path;
a second valve located in the second gas flow path to open and close said second gas flow path which, in use, is biased in a closed position; and a second insert being movable to open the second valve and having a second surface;
conduit means for supplying pressurized gas from said high pressure gas source to said second gas flow control unit; and means for providing compressed engagement between said second gas flow control unit and a co-operating first gas flow control unit of a cylinder; and a plurality of pressurized gas cylinders, each cylinder having an outlet in which is mounted a first gas control unit comprising:
a first valve housing for mounting said first gas flow control unit in gas flow communication with an interior of the cylinder, said first valve housing having a first gas flow path;
a first valve located in the first gas flow path to open and close said first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open said first valve and having a first surface for engagement with said second surface of said second insert of said second gas flow control valve, wherein gas enters the cylinder via the conduit means, the second gas flow control unit and the first gas flow control unit when the first and second gas flow control units are brought into compressed engagement and the first and second surfaces of the first and second inserts engage to move their respective valves to open positions.
10. A method of filling a pressurized gas container from a source of high pressure gas comprising:
providing a first gas flow control unit in gas flow communication with a pressurized gas container, said first gas flow control unit comprising:
a first valve housing for mounting said first gas flow control unit in gas flow communication with an interior of the container, said first valve housing having a first gas flow path;
a first valve located in the first gas flow path to open and close said first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open said first valve and having a first surface;
providing a second gas flow control unit in gas flow communication with a source of high pressure gas, said second gas flow control unit comprising:
a second valve housing for mounting said second gas flow control unit in gas flow communication with the gas source, said second valve housing having a second gas flow path;
a second valve located in the second gas flow path to open and close said second gas flow path which, in use, is biased in a closed position; and a second insert being movable to open the second valve and having a second surface for engagement with the first surface of the first insert of the first gas flow control unit; and providing compressed engagement between the first gas flow control unit and the second gas flow control unit such that the first and second surfaces of the first and second inserts engage to move their respective valves to open positions.
providing a first gas flow control unit in gas flow communication with a pressurized gas container, said first gas flow control unit comprising:
a first valve housing for mounting said first gas flow control unit in gas flow communication with an interior of the container, said first valve housing having a first gas flow path;
a first valve located in the first gas flow path to open and close said first gas flow path which, in use, is biased in a closed position, and a first insert being movable to open said first valve and having a first surface;
providing a second gas flow control unit in gas flow communication with a source of high pressure gas, said second gas flow control unit comprising:
a second valve housing for mounting said second gas flow control unit in gas flow communication with the gas source, said second valve housing having a second gas flow path;
a second valve located in the second gas flow path to open and close said second gas flow path which, in use, is biased in a closed position; and a second insert being movable to open the second valve and having a second surface for engagement with the first surface of the first insert of the first gas flow control unit; and providing compressed engagement between the first gas flow control unit and the second gas flow control unit such that the first and second surfaces of the first and second inserts engage to move their respective valves to open positions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0018011.7 | 2000-07-21 | ||
| GBGB0018011.7A GB0018011D0 (en) | 2000-07-21 | 2000-07-21 | A valve assembly apparatus and method of filling a pressurised gas container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2353246A1 CA2353246A1 (en) | 2002-01-21 |
| CA2353246C true CA2353246C (en) | 2007-02-13 |
Family
ID=9896148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002353246A Expired - Fee Related CA2353246C (en) | 2000-07-21 | 2001-07-18 | A valve assembly, apparatus and method for filling a pressurized gas container |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US6571835B2 (en) |
| EP (2) | EP1174649B3 (en) |
| JP (1) | JP4455784B2 (en) |
| AT (1) | ATE349641T1 (en) |
| BR (1) | BR0103699B1 (en) |
| CA (1) | CA2353246C (en) |
| DE (1) | DE60125469T3 (en) |
| DK (1) | DK1174649T3 (en) |
| ES (1) | ES2277899T7 (en) |
| GB (1) | GB0018011D0 (en) |
| MX (1) | MXPA01007374A (en) |
| PT (1) | PT1174649E (en) |
| ZA (1) | ZA200105959B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2632533A1 (en) * | 2006-01-26 | 2007-08-02 | Frederick Gibb | Dispenser low quantity indicator |
| EP2153858A1 (en) * | 2008-08-07 | 2010-02-17 | Air Products and Chemicals, Inc. | Improved helium balloon lifting-gas |
| JP5635405B2 (en) * | 2008-09-16 | 2014-12-03 | 阿部 公平 | Compressed gas filling device |
| CN107388282B (en) * | 2017-09-13 | 2022-09-06 | 徐绍博 | Lighter gas-filling device |
| NL2027812B1 (en) * | 2021-03-23 | 2022-10-07 | Folat B V | Balloon gas tank filling piece |
| WO2022200431A1 (en) * | 2021-03-23 | 2022-09-29 | Folat B.V. | Balloon gas tank filling piece |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1214923B (en) * | 1963-11-19 | 1966-04-21 | Heinrich Maltner G M B H | Filling device for gas lighters |
| FR2138858B1 (en) * | 1971-05-27 | 1973-07-13 | Visscher Patrick De | |
| US4406314A (en) | 1981-03-02 | 1983-09-27 | Rodney Gomersall | Valve actuators |
| GB2123929B (en) | 1982-06-15 | 1986-01-08 | Rodney Gomersall | Valves for pressure vessels |
| JP2569536B2 (en) * | 1987-03-10 | 1997-01-08 | トヨタ自動車株式会社 | Gas filling method for gas fueled vehicles |
| FR2623875B1 (en) | 1987-11-30 | 1990-04-27 | Valois | DEVICE FOR THE FILLING IN GAS OF AN AEROSOL CONTAINER THROUGH A PUMP STITCHED ON THIS CONTAINER |
| DE4334182A1 (en) * | 1993-10-07 | 1995-04-13 | Flow Instr & Engineering Gmbh | Shut-off device, especially a valve |
| US5560405A (en) * | 1994-03-31 | 1996-10-01 | Eastman Kodak Company | Flow control system and method |
| JP3244381B2 (en) * | 1994-05-11 | 2002-01-07 | 昭和炭酸株式会社 | Valve device |
| US5634505A (en) * | 1995-04-25 | 1997-06-03 | J.C. Carter Company, Inc. | Refueling system for race cars |
| US5669426A (en) * | 1996-06-21 | 1997-09-23 | Colibri Corporation | Dispensing device |
| JP4324283B2 (en) * | 1999-05-21 | 2009-09-02 | 株式会社ネリキ | Gas cylinder valve device |
-
2000
- 2000-07-21 GB GBGB0018011.7A patent/GB0018011D0/en not_active Ceased
-
2001
- 2001-07-16 BR BRPI0103699-8A patent/BR0103699B1/en not_active IP Right Cessation
- 2001-07-17 DK DK01306126T patent/DK1174649T3/en active
- 2001-07-17 EP EP01306126A patent/EP1174649B3/en not_active Expired - Lifetime
- 2001-07-17 DE DE60125469T patent/DE60125469T3/en not_active Expired - Lifetime
- 2001-07-17 EP EP06019951A patent/EP1746315A3/en not_active Withdrawn
- 2001-07-17 ES ES01306126T patent/ES2277899T7/en active Active
- 2001-07-17 PT PT01306126T patent/PT1174649E/en unknown
- 2001-07-17 AT AT01306126T patent/ATE349641T1/en not_active IP Right Cessation
- 2001-07-18 CA CA002353246A patent/CA2353246C/en not_active Expired - Fee Related
- 2001-07-19 ZA ZA200105959A patent/ZA200105959B/en unknown
- 2001-07-19 JP JP2001219185A patent/JP4455784B2/en not_active Expired - Fee Related
- 2001-07-19 US US09/909,004 patent/US6571835B2/en not_active Expired - Lifetime
- 2001-07-20 MX MXPA01007374A patent/MXPA01007374A/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| DE60125469D1 (en) | 2010-09-16 |
| EP1174649A2 (en) | 2002-01-23 |
| MXPA01007374A (en) | 2003-05-19 |
| CA2353246A1 (en) | 2002-01-21 |
| EP1746315A2 (en) | 2007-01-24 |
| EP1746315A3 (en) | 2007-12-26 |
| JP4455784B2 (en) | 2010-04-21 |
| GB0018011D0 (en) | 2000-09-13 |
| PT1174649E (en) | 2007-03-30 |
| JP2002089796A (en) | 2002-03-27 |
| ES2277899T7 (en) | 2012-03-16 |
| DE60125469T3 (en) | 2011-05-05 |
| US20020007865A1 (en) | 2002-01-24 |
| EP1174649B3 (en) | 2010-11-24 |
| US6571835B2 (en) | 2003-06-03 |
| BR0103699A (en) | 2002-03-05 |
| EP1174649B1 (en) | 2006-12-27 |
| ZA200105959B (en) | 2003-01-20 |
| DE60125469T2 (en) | 2007-10-04 |
| EP1174649A3 (en) | 2003-01-02 |
| DK1174649T3 (en) | 2007-02-19 |
| ATE349641T1 (en) | 2007-01-15 |
| BR0103699B1 (en) | 2010-06-15 |
| ES2277899T3 (en) | 2007-08-01 |
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Legal Events
| Date | Code | Title | Description |
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| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20160718 |
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| MKLA | Lapsed |
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