US1988017A - Spraying apparatus - Google Patents

Description

Jan. 15, 1935. A T, NORWICK 1,988,017

SPRAYING APPARATUS Filed Jan. 24, 1955 2 Sheets-Sheet l ANTHONY T NoR 10K Jan. 15,1935. A. T, NORWICK 1,988,017

SPRAYING APPARATUS Filed Jan. 24., 1935 2 Sheets-Sheet 2 INVENTOR. ANTHONYT NOR ICK A TTORNEY Patented Jan. 15, 1935 UNITED STAT-ES PATENT OFFICE SPRAYING APPARATUS Anthony Norwick, Oakland, Calif.

Application January 24, 1933, Serial No. 653,225

Claims. (01. 299-48) The invention relates to a hand-manipulated pressure-actuated spraying device.

An object of the invention is to provide a device of the character described which is equally ef- 5 fective for spraying wet substances such as paint,

oils, cementitious materials, and the like, or dry substances such as sand, aggregates and so forth.

Another object of the invention is to provide a device of the character described which is so de- --signed that it requires but one hand of the oper ator for control, permitting the operator to use the other hand for supporting the weight of the device particularly such as when the material to be sprayed is carried in a hopper mounted on the device.

A further object of the invention is to provide a spraying device in which control of the material discharged from the device is afiorded by variable positioning of an air nozzle, but in which the change in positioning of the nozzle is permitted independent of the air conduit connected with the nozzle, thereby allowing a more accurate and easy control of the discharge and permitting of a design in which the nozzle is a permanent part of the spray device rather than of the air conduit arranged to be connected to the device.

A still further object of the invention is to provide a device of the character described in which the passage of any material or foreign matter to the bearing parts of the device, with the resultant undue wear of such parts, will be effectively curtailed in the operative and inoperative positions of the device as well as when portions of the device are removed for cleaning or for replacement of material.

Yet a further object of the invention is to provide a device of the class described which has the parts easy to assemble and take apart for cleaning, permits the ready substitution of materials for handling by the device, and enables the detachment of the air connection without spilling or escape of the material.

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of the preferred form of the invention which is illustrated in the drawings accompanying and forming part of the specification. It is to be understood, however, that variations in the showing made by the said drawings and description may be adopted within the scope of the invention as set forth in the claims.

Referring to said drawings:

Figure 1 is a longitudinal sectional view of the device with parts removed.

Figure 2 is a view similar to Figure 1, but on a smaller scale and with the device shown in position for discharging material.

Figure 3 is a plan view of the device with the material supply hopper removed.

Figure 4 is a perspective view of the movable air nozzle provided in the device.

Figure 5 is a perspective view of the air conduit between the nozzle and the air line attachment.

Figure 6 is a perspective view of the wiper unit with a portion broken away.

Figure 7 is a side view of the device provided with a flexible material-supply line.

Figure 8 is a sectional view of a modified form of material discharge nozzle.

As illustrated in the drawings, the spraying device, as I prefer to construct it, includes a main body member made up of separable portions 2, 2 having engaging portable faces 3 in a vertical plane intersecting the longitudinal axis of the device. The body portions are secured together at the middle by means of screws 4., and at one end by a cap 5 and at the other end by a ring 7 of a body extension 8, the body portions 2, 2 being externally threaded at the ends for engagement with correspondingly interiorly threaded portions on the cap and ring.

The body extension 8 as here shown includes a hollow member 9 which corresponds to a T-shaped pipe fitting and within which at one end is threadedly connected a bearing unit 12 which is held against the 'end face 13 of the portions 2, 2 by means of interlocking flanges 14 and 15 formed on the cap 5 and ring 7 respectively. In the present embodiment of the inventiomsupply of material to the device is through means of a hopper 17 arranged to be mounted on the fitting 9 with its discharge end leading to a chamber 18 in the fitting. Preferably the hopper is designed for removable attachment to the fitting so that replacement of hoppers with different materials may be readily eifected, and as here shown a simple form of attachment is afforded by the use of a ring 19 arranged for threaded connection with the fitting and designed to clamp the flange 21 of the hopper in place against the fitting.

At the end of the fitting opposite that connected to the main body is a nozzle member 21 through which the material from the device is arranged to be discharged, and preferably the nozzle is removably attached to the fitting so as to permit ready substitution of one nozzle such as illustrated in Figure 1 for a nozzle of any other .type such as the one 21 shown in Figure 8 and designed for directing the material upwardly at an angle to the longitudinal axis of the device. 1 Slidably fitted in the body 2, 2 for longitudinal movement therein is a sleeve 23 which is telescopically fitted over a tubular member 24 and provides a combination nozzle and valve for directing and controlling the air under pressure for effecting the discharge of material through the outlet nozzle 21. The tube 24. as will be clearly evident from Figures 1 and 5, has an angularly depending portion comprising sections 25 and 26 which extend through a handle portion 27 of the body 2, 2 serving as a convenient means of gripping the device. The section 26 is preferably of larger diameter than the section 25 and is designed to receive a connector fitting 28 of an air hose line 29 or the like in communica tion with a suitable source of air under pressure. It will be noted that while the entire tube 24 as well as the sleeve 23 is readily removable from the body by reason of the sectional form of the latter, the tube is held in a fixed position in the body when operatively retained therein. In this manner a continuous air passage will be afforded through the device, and at the same time a portion will be held fixed for connection with the air hose, and another portion will be movable for controlling the discharge of the material.

As aforesaid, the sleeve 23 is designed to serve as a valve for controlling the discharge of material from the device, as well as a nozzle for the air, and as will be clear from Figure 1 the outlet end of the nozzle is positioned within the chamber 18 and may be moved to either engage the outer nozzle member 21 so as to prevent discharge of material through the opening therefor or disengage said member so as to permit the material under the ejector action produced by the air to flow through such opening, the amount of material which may discharge from the device, with a given air pressure, being governable to a large extent by varying the distance between the engaging face 31 of the air nozzle and the seating face 32 of the nozzle member. Preferably the cooperating faces 31 and 32 are bevelled to insure a more ready and positive engagement thereof and at the same time permit a more direct fiow of the material from the chamber 18. To retain the valve member 23 normally in closed position, a spring 33 is mounted within the body and interposed between an adjustable stop 34 and an extension 36 of the member, said extension cut away along the bottom so as to clear the angular section 25 of the air tube during movement of the member.

Movement of the member 23 against the resistance of the spring 33 may be effected in any suitable manner. As here shown a lever 37 is mounted on the body and arranged for engagement with a collar 38 on the member, and by pulling on a trigger 39 also fulcrumed on the body, the valve member may be retracted and held in any position desired. It will be evident that the device may be readily handled and operated by the operator and that it may be controlled by him without requiring any cessation in the work. For example, with one hand he can grip the handle and operate the trigger while with the other hand he can support the end of the device carrying the hopper and material therein. This ease of handling and operation is also true in the case where, as in Figure 7, the material is arranged to be fed to the device through means of a flexible materialfeed line 41 in the place of the hopper. It will also be evident, since the valve member 23 is normally held closed and is operable independent of the air hose connection, detachment of the latter from the device will not as such entail any spilling of the material.

One of the most important features in the design of the device is that of effectively keeping the material from reaching the bearing surfaces of the working parts. As aforementioned, a hearing unit 12 is contained within the end of the fitting 9 abutting the main body portions 2, 2, and as will be clear from Figure 1, such bearing augments a bearing portion 42 at the adjacent end of the body in slidably supporting the sleeve member 23. The unit 12 includes an outer housing 43 which has provided therein the threaded and flange portions aforesaid for retaining the unit in position. In addition there are provided on said housing notches 44 which are engaged by projections 46 on the body for preventing relative rotation of the unit with the latter. At the end of the unit nearest the discharge chamber 18, the housing is closed and provides a bearing 4'7 for the member 23. The end of the housing adjacent the body is open whereby there may be readily inserted within the housing a shell 48 filled with a loose, fibrous or other like soft substance capable of absorbing and retaining a liquid such as lubricating oil. The shell 48 is closed at the open end of the housing so that the fibrous substance and oil are more effectively retained within the unit. Preferably the fibrous substance is in the form of a plurality of felt washers 49 perforated at the center and designed to engage the member 23 completely therearound. Oil may be supplied to the interior of the shell through a passage 49 in the body, sufficient clearance being provided between the closed end of the shell and sleeve member 23 to permit the oil to seep into the interior of the shell to the washers. It will be clear that owing to the close metal to metal contact provided by the bearing 47, none but only the finest particles of the material can possibly escape thereby toward the interior of the device. As soon however as any fine particles pass the bearing 47, they will be immediately trapped within the oil saturated felt so that escape of any material into the body-bearing 42 will be entirely prevented. Should the felt and oil become overladen with the fine particles, it is merely necessary to momentarily detach the body extension 9 and replace the washers, preferably as a unit with the enclosing shell.

It is important to note that the extent to which the valve or nozzle member 23 may be retracted in operation of the device, that is by the trigger, will not be sufficient to bring about any disengagement of said member with any of the bearings. In this way, neither the engaging surface of the bearings or of the sleeve member can become coated with the material to thereby cause premature wear of such surfaces and con sequent inefficient operation of the device. It is also important to note that since the bearing 42 is at the end of the main body portions 2, 2, and remains in engagement with the sleeve member at all times, no material orother foreign matter may enter the body even when the body extension 9 is entirely detached therefrom, as when the latter is being cleaned.

I claim:

1. A spraying device comprising a body, telescoping tubular members in said body providing a continuous air passage therein, a chamber having a material outlet, one of said members being fixed against movement in the body and the other being movable therein and arranged to close said outlet, a portion of said fixed section being angularly disposed relative to the remaining portion and arranged for connection with a source of air under pressure, said movable member having a portion thereof recessed and positioned to span the angular portion of said flxed member to permit relative movement thereto.

2. A spraying device comprising a body, a material discharge chamber therein having an outlet, a tubular member fixed in said body providing an air passage therein and having an angularly disposed portion arranged for connection to a source of air under pressure, a tubular member telescopically mounted on the first member and arranged for closing said outlet and formed with a recessed portion positioned to span said angularly disposed portion to permit movement of said second member relative to the first member, means resiliently urging said second member to close said outlet, and means for moving said second member against the action of said last means to open said outlet.

3. A spraying device comprising a body having a longitudinally extending portion and a portion extending angularly therefrom intermediate the ends thereof and providing a handle, a tubular member fixed in said body and having a portion thereof in said angular portion of the body and a portion in said longitudinally extending portion, a material discharge chamber in said body adjacent one end of said longitudinal portion and having an outlet, a tubular member telescopically mounted on the portion of the first member in the longitudinal portion 01 the body and arranged to extend into said chamber and close said outlet, a spring for moving said movable member to close said outlet in said body adjacent the end opposite the chamber, an extension of said movable member interposed between said member and spring and positioned to span and clear the angular portion of the fixed member, and meansto move the movable member against the action of said spring.

4. A spraying device in accordance with claim 3 characterized by the body being formed of sections separable inwardly oi the end portion containing the chamber, and a bearing for the movable member in each of the body sections adjacent the adjoining ends.

5. A spraying devicerin accordance with claim 3 characterized by the body being formedof sec tions separable inwardly of the end portion containing the chamber, a sealing bearing for the movable member in each body section adjacent the adjoining ends, the bearing in the body endportion containing the chamber comprising a housing, and an absorbent wiping material in said housing engaging the said member.

ANTHONY T. NORWICK.

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