EP1151801A1 - Locking system for a pump dispenser - Google Patents
Locking system for a pump dispenser Download PDFInfo
- Publication number
- EP1151801A1 EP1151801A1 EP01201599A EP01201599A EP1151801A1 EP 1151801 A1 EP1151801 A1 EP 1151801A1 EP 01201599 A EP01201599 A EP 01201599A EP 01201599 A EP01201599 A EP 01201599A EP 1151801 A1 EP1151801 A1 EP 1151801A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plunger rod
- collar
- rib
- groove
- pump dispenser
- Prior art date
- 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.)
- Granted
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1042—Components or details
- B05B11/1059—Means for locking a pump or its actuation means in a fixed position
- B05B11/106—Means for locking a pump or its actuation means in a fixed position in a retracted position, e.g. in an end-of-dispensing-stroke position
Landscapes
- Closures For Containers (AREA)
- Reciprocating Pumps (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Nozzles (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Description
- The present invention relates to a locking system for a pump dispenser, comprising a collar and a plunger rod movably received therein.
- Pump dispensers are widely known in the art. Such devices are used, for example, for dispensing a predetermined amount of liquid soap, skin cream, or other liquid substances. By means of a spring, the plunger rod is held in a highest position in relation to the collar, and such as to allow the plunger rod to be moved downward against the spring action. A general disadvantage of such pump dispensers is that each time a dispenser head that is attached to the plunger rod is pressed, an amount of the liquid is dispensed. Whereas this is desirable when in use, it is generally not desirable during transport. A solution for this problem is placing an intermediate member between the dispenser head and the collar in order to make it impossible for the dispenser head to be moved downward and thus for any of the liquid to be dispensed. The disadvantage with this is, however, that such an intermediate member is simply discarded after the initial use, making a subsequent convenient transport of the complete pump dispenser impossible. Such a system has the additional disadvantage that in the locked position, the dispenser takes up much space. There are also pump dispensers on the market of which the dispenser head at its bottom side near the plunger rod is provided with an external thread for screwing it onto the collar, which is provided with intermating internal thread. However, a disadvantage of this system is that several rotational movements are necessary in order to retain the dispenser head and the plunger rod in a downward position.
- The pump dispensers according to the prior art therefore have the general disadvantage that due to a safeguard being provided, the dispenser takes up much space, or that various operations are necessary in order to put the dispenser into the locked condition.
- The object of the present invention is to provide an improved locking system for a pump dispenser. To this end the plunger rod of the locking system for a pump dispenser is provided with at least one rib longitudinally extending over a distance from a first to a second end, and the collar is provided with at least one groove for guiding the rib therein, and for preventing a rotational movement of the plunger rod in relation to the collar, the first end of the rib, when having been brought into a down position, being removable from the groove in order to allow a rotational movement of the plunger rod in relation to the collar.
- When the rib during the downward movement of the plunger rod is guided into the groove in the collar, such that the highest part of the rib is guided under the bottom end of the groove, the plunger rod becomes rotatable. The spring action subsequently causes the plunger rod to be pushed upward, until the first end of the rib abuts to the underside of the collar. This prevents the plunger rod from moving upward again, unless the rib is being guided into the groove through the collar.
- In order to prevent the rib being guided into the groove due to rotation of the plunger rod, which might occur through a movement against the dispenser head, and then being pushed upward again by the spring action, it is preferred for the collar to be provided with at least one cavity, which is only accessible from below and which is moved axially in relation to the at least one groove. Rotating the plunger rod such that the rib is positioned underneath said cavity will cause the rib to be pushed by the spring action into the cavity with the result that a rotational movement is no longer possible. To remove the rib from this locked position, the plunger rod must first be pushed slightly downward and subsequently rotated until the rib can be guided into the groove.
- According to a further preferred embodiment, it is advantageous for the wall part at both sides of the access at the bottom side of the groove, and optionally at both sides of the access at the underside of the cavity, to be rounded. This makes it easy for the rib to be guided into the groove or the cavity, respectively.
- According to yet another preferred embodiment, it is advantageous for the second end of the rib, which is at a lower position on the plunger rod than the first end, to be positioned near the bottom end of the plunger rod, such that the same is in the groove when the plunger rod, due to the spring action, is in the highest position. Firstly, this prevents the plunger rod when it is being pushed downward from rotating in relation to the collar. Secondly, it will enable the plunger rod on the downward, to make its maximal stroke, while this would not be the case if in the rest position the second end were at a higher position than the collar and if with the downward movement of the plunger rod, said end were not guided into the groove. Thirdly, this always provides a good starting position when the plunger rod is pushed downward in order to subsequently allow the same to be locked.
- According to a further embodiment, the second end of the rib may be positioned closer to the first end. In that case it is possible to, when in use, turn the dispenser knob to any desired position. The second end needs then to be positioned high enough to allow the plunger rod to be pushed down sufficiently to be able to dispense a required amount of liquid when the second end, instead of being guided in the groove touches the top side of the collar.
- Other possibilities and advantages as well as variations will become clear from the description of the invention following below, with reference to the figures.
- The figures show a preferred embodiment of the invention.
- Figure 1 shows a side view of a portion of a pump dispenser, part of which is represented in cross section.
- Figure 2 shows a top view of the plunger rod in the collar on the line of the arrows II-II in Figure 1.
- Figure 3 shows a side view of a pump dispenser, partially cut-away.
- Figure 4, shows a bottom view of the pump dispenser according to the invention on the line of the arrows IV-IV of Figure 3.
- Figure 5, shows a bottom view of a pump dispenser on the line V-V of Figure 1.
- Figure 6, shows a top view on the line of the arrows VI-VI in Figures 3.
- Figure 7, shows a cross section of the collar on the line of the arrows VII-VII in Figure 2.
- Figure 8, shows a cross section of the collar on the line of the arrows VIII-VIII in Figure 6.
-
- In Figure 1, a portion of a pump dispenser is shown in which the
dispenser head 1, theplunger rod 2, acollar 3, as well as acylinder 4 and aspring 5 are clearly visible. On theplunger rod 2, twolongitudinal ribs 6 are provided at 180° in relation to each other. In the position represented, a widened portion attached to the bottom side of theplunger rod 2 abuts to the underside of thecollar 3. Thespring 5 ensures that there is a firm contact between said widened portion and thecollar 3. - In Figure 2, a top view of the
collar 3 is shown on the line of the arrows II-II of Figure 1. Thecollar 3, theplunger rod 2, and the tworibs 6 are clearly visible in this figure. Theribs 6 are guided throughgrooves 7 in thecollar 3. The figures clearly show that during a downward movement and in rest, theribs 6 make a rotational movement of the plunger rod in relation to the collar impossible. - When the plunger rod is pushed downward, a first end 11 of the
rib 6 will be guided through, and as far as under thegroove 7 in thecollar 3. When the first end 11 has been guided under the collar, it is possible to make a rotational movement with the collar. When subsequently releasing the plunger rod, the upward force exerted by thespring 5 on the plunger rod will cause the first end 11 of theribs 6 to be pushed against the underside of thecollar 3. This makes a further upward movement of theplunger rod 2 impossible. The plunger rod is thus fixed in the lowest position. - Figure 3 shows the pump dispenser according to Figure 1, with the plunger rod in the lowest position, and the top end of the
rib 6 being lodged in acavity 8 provided at the underside of thecollar 3. Theplunger rod 2 is rotated 90° in relation to the position as represented in Figure 1. In this Figure 3, thedispenser head 1 is shown from the rear, whereas thecollar 3 is shown from the same side as in Figure 1. Thus thecavity 8 is turned 90° in relation to thegroove 7. This Figure 3 clearly shows that the portion at the underside of the collar and at both sides of the access of thecavity 8 is slightly rounded. This facilitates positioning the first end 11 of therib 6 into thecavity 8. The provision of thecavity 8 ensures that it is not possible to simply rotate thedispenser head 1, which would cause the end 11 of therib 6 to be guided into thegroove 7, which would result in the aggregate being pushed upward again by thespring 5. - Figure 4 shows a cross section on the line of the arrows IV-IV in Figure 3, clearly showing the
grooves 7 and thecavities 8. It is also clearly visible that theribs 6 are positioned in thecavities 8. - Figure 5 shows a cross section on the line of the arrows V-V in Figure 1, and corresponds broadly speaking with the view represented in Figure 4, but the
plunger rod 2 is rotated 90°. In this case theribs 6 are received in thegrooves 7 and thecavities 8 are vacant. - Figure 6 shows a view on the line of the arrows VI-VI of Figure 3 in which the
grooves 7 are vacant, and in which the ribs 6 (not shown) are located under thecover plate 3 of the collar. - Figure 7 shows a cross section of the
collar 3 on the line of the arrows VII-VII of Figure 2. In this figure theplunger rod 2 and theribs 6 have been omitted. Thecavity 8 is clearly visible in this figure, as well as therounded rim portions 10 at the underside of the collar and at both sides thereof. - Figure 8 shows a cross section on the line of the arrows VIII-VIII of Figure 6, with the
groove 7 being clearly visible. Thegroove 7 is similarly provided with rounded, in fact tapering, wall portions at both sides of the access at the bottom of thegroove 7. This facilitates a simple positioning of the first end 11 of therib 6 from below. - Optionally, the
ribs 6 may be embodied shorter than represented in the figures. A particular possibility is, for example, to position thesecond end 12 closer to the first end 11. In that situation, the plunger rod and thedispenser head 1 attached thereto are freely rotatable. If thesecond end 12 is positioned high enough, there is adequate room for theplunger rod 2 and thedispenser head 1 attached thereto to be pushed down a distance such as to pump up a desirable amount of liquid. - It is also possible to embody the
rib 6 as an integral part of theplunger rod 2, for example, by making theplunger rod 2 oval, with the largest diameter at either side of theplunger rod 2 forming the tworibs 6. Above the first end 11, the plunger rod may be cylindrical. In that case thecollar 3 comprises an opening having a corresponding oval cross section, so that when the oval portion has been moved into the downward position, it is located under the collar, thereby allowing the same to be rotated. In this case also, the first end 11 will abut to the bottom side of thecollar 3. - The embodiments represented in these figures are not to be understood to limit the scope of the invention. A person skilled in the art is well capable of making adaptations and improvements to the embodiments represented in the drawings and described above. The protective scope of the invention is determined solely by the appended claims.
Claims (5)
- A locking system for a pump dispenser, comprising:a collar (3) anda plunger rod (2) movably received therein,the plunger rod (2) being provided with at least one rib (6) longitudinally extending over a distance from a first end (11) to a second end (12), andthe collar being provided with at least one groove (7) for guiding the rib (6) therein,the first end (11) of the rib (6), when having been brought into a down position, being removable from the respective groove (7) in order to make a rotational movement of the plunger rod (2) in relation to the collar (3) possible.
- A locking system for a pump dispenser according to claim 1, the collar (3) which is moved axially in relation to the at least one groove (7), being provided with at least one cavity (8), which is only accessible from below.
- A locking system for a pump dispenser according to claim 1 or 2, with the wall portion at both sides of the access at the bottom side of the groove (7) being rounded.
- A locking system for a pump dispenser according to claim 2 or 3, with the wall portion at both sides of the access of the cavity (8) being rounded.
- A locking system for a pump dispenser according to one of the preceding claims, with the second end (12) of the rib (6) being in a position such that the same is in the groove (7) when the plunger rod (2) is in a highest position.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1015098 | 2000-05-03 | ||
NL1015098A NL1015098C2 (en) | 2000-05-03 | 2000-05-03 | Locking system for a pump dispenser. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1151801A1 true EP1151801A1 (en) | 2001-11-07 |
EP1151801B1 EP1151801B1 (en) | 2006-12-27 |
Family
ID=19771311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01201599A Expired - Lifetime EP1151801B1 (en) | 2000-05-03 | 2001-05-03 | Locking system for a pump dispenser |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1151801B1 (en) |
AT (1) | ATE349280T1 (en) |
DE (1) | DE60125454T2 (en) |
ES (1) | ES2279784T3 (en) |
NL (1) | NL1015098C2 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2124711A (en) * | 1982-07-26 | 1984-02-22 | Aerosol Inventions Dev | Manually operated pump for small dispensers |
US5899363A (en) * | 1997-12-22 | 1999-05-04 | Owens-Illinois Closure Inc. | Pump dispenser having a locking system with detents |
US6006949A (en) * | 1998-01-12 | 1999-12-28 | Continental Sprayers International, Inc. | Manually operated reciprocating liquid pump with sealing vent opening |
-
2000
- 2000-05-03 NL NL1015098A patent/NL1015098C2/en not_active IP Right Cessation
-
2001
- 2001-05-03 EP EP01201599A patent/EP1151801B1/en not_active Expired - Lifetime
- 2001-05-03 AT AT01201599T patent/ATE349280T1/en active
- 2001-05-03 ES ES01201599T patent/ES2279784T3/en not_active Expired - Lifetime
- 2001-05-03 DE DE60125454T patent/DE60125454T2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2124711A (en) * | 1982-07-26 | 1984-02-22 | Aerosol Inventions Dev | Manually operated pump for small dispensers |
US5899363A (en) * | 1997-12-22 | 1999-05-04 | Owens-Illinois Closure Inc. | Pump dispenser having a locking system with detents |
US6006949A (en) * | 1998-01-12 | 1999-12-28 | Continental Sprayers International, Inc. | Manually operated reciprocating liquid pump with sealing vent opening |
Also Published As
Publication number | Publication date |
---|---|
DE60125454T2 (en) | 2007-10-11 |
EP1151801B1 (en) | 2006-12-27 |
NL1015098C2 (en) | 2001-11-06 |
ES2279784T3 (en) | 2007-09-01 |
DE60125454D1 (en) | 2007-02-08 |
ATE349280T1 (en) | 2007-01-15 |
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