US2535726A - Plasterer's hawk - Google Patents

Description

Dec. 26, 1950 B. w. DALTON PLASTERERS HAWK Filed April 30, 1948 Patented Dec. 26, 1950 UNITED STATES PATENT OFFICE PLASTERERS HAWK Byron W. Dalton, Chicago, Ill.

Application April 30, 1948, Serial No. 24,186

7 Claims. (Cl. 4'7 2-135) My invention relates to a hawk on which to carry a small supply of fluid plaster preliminary to its being taken up upon a trowel for application to a wall or ceiling where it is to be spread.

The principal object of this invention is the con` C struction of a hawk having a hollow handle adapted for connection with a flexible conduit through which plaster may be flowed under pressure for deposit upon the top face of the hawk; and in such a construction to provide for a controlled supply of the plaster to the hawk by means of a valve which normally shuts off the flow of fluid plaster, but which, in response to manual pressure, will release the plaster for flowing onto the top face of the hawk. Other minor objectives are also attained by my invention as will appear hereinafter from the ensuing detailed description taken in conjunction with the accompanying drawing in which is described a preferred construction in the manner following:

Figure 1 is a view in perspective of the present hawk in the hands of a workman who is shown in the act of applying plaster to a wall, the hawk being held in the normal operative position which permits some of the uid plaster to be taken up by the trowel from time to time;

Fig. 2 is a side elevation of the hawk showing the position of the workmans hand in relation to the valve by which the flow of fluid plaster to the top face of the hawk is controlled;

Fig. 3 is an enlarged vertical section through the hawk and its supporting handle showing a slight modification;

Fig. 4 is a horizontal section, lookingupwardly, taken on line 4-4 of Fig. 3; and

Fig. 5 is a view in perspective looking toward the top face of the block forming part of the slide valve. The present hawk H comprises a plaster-supporting plae ID of aluminum or the like, and dei sirably of rectangular contour in accordance with usual practice. On the under side of the hawk, centrally thereof, is affixed a reenforcing disc I2 to the underside of which is secured a block I6, formed on its upper face with a diametric channel IB which provides a guideway for a slide valve I8 in the general form of a strap. This valve which is reciprocable close to the hawk is conned between the disc I2 and block I4 so as to have capacity for movement only back and forth within the guideway I6. The slide valve I 8 is apertured at 20, and at its outer end is provided with a downturned iinger 22 adapted to receive pressure from the thumb t of the workmans hand (see Fig. 2). The hawk plate I0'. reinforcing disc I2 and block I i are desirably interconnected in unitary relation as by rivets 2t whose heads at the top are iinished off smooth and flush with the top face of the hawk.

Formed centrally of the hawk plate I0, the disc I2, and the block I4 are registering openings 24 which may be threaded for coaction with the externally threaded upper end portion of a sleeve 26 which extends from the under face of the hawk 'plate downwardly within a tubular grip 23, the sleeve and grip together constituting a handle convenient for holding by the fingers f of a workmans hand. As shown in Fig. 2, when the hawk is supported in the hand, the thumb t is in position to engage the finger of the slide valve I8 and push the same toward the axis of the hawk handle.

The lower end portion of the sleeve 2li is internally threaded for coaction with a coupling C which is extended therebelow for threaded connection with a flexible conduit 3D of rubber or the like. This conduit at its opposite end is in connection with a drum 32 in which the iiuid plaster is contained. The supply drum may be carried upon a wheeled platform 34 constituting a dolly which may be readily moved about from place to place either on the floor where the plastering operation is being carried on, or perhaps on a level either above or below. In the former case, the plaster will flow by gravity to the hawk to be released upon its top face in accordance with the workmans manipulations of the slide valve I8; but if the plaster supply be maintained on the same floor or at a lower level as that whereon the workman is performing his job (this arrangement beingsuggested in Fig. l), then it will be desirable for the dolly to mount a compressor or pump P to be driven by a motor M, the compressorbeing installed inl operative relation to the plaster which is to be delivered from the' container l32. AA short length of conduit is all that need be used, it being feasible always to shift the dolly from place to place to follow closely behind the plasterer wherever he may be.` From time to time, as required, fresh duid plaster is dumped into-the drum so as to assure an ample supply in-reserve. If desired, morethan one conduit 4may be connected to the supply source '(or to thepump'P), each conduit leading to a separate hawk to be used by a workman in the same vicinity who mav be engaged in the same plasering operation.

The block I @which provides the guide for the slide valve I8 may also be formed on its lunder face with a pair of slots 40, one on each side of the channel I6, each slot facing out upon one side of the block which is remote from the finger end of the slide valve. Within each slot is iitted a tension spring 42 (see Fig. 4) anchored at 44 near the inner end of the slot and extended outwardly through its open end for connection with the proximate end of a depending flange 4t which may protrude laterally beyond the slide valve at that point. This flange is adapted to engage the block I4 to serve as a stop when the slide valve is operated to one extreme position (see Fig. 4) in response to tension of the springs 42. In this position the aperture 2l) through the slide valve is out of register with the opening 24 in the block I 4 and the central passageway through the sleeve 26. If, however, the slide valve be pushed inwardly against the tension of the springs 42, a stop plate 48 will limit its advance to a point where the valve aperture 20 is in full register with the block hole I4 whereby to open up a passageway for the flow of plaster through the sleeve 26 to the top race of the hawk plate. The rate of ow may be controlled as by opening the valve for less than the full distance, and the amount of plaster thus released for deposit upon the top face of the hawk may also be determined by the length of time that the valve is held open. A iiexible guard 49 of rubber or the like is supported in place just below the block I4 so as to protect the hand of the workman.

A slight modication is suggested in Fig. 3 wherein a spring arm 5t having an endwise bowed or ogee contour is connected as by screws 5I and 52 at opposite ends to the finger piece 22 and grip 28, this arm being engaged by the fingers so that inward pressure thereon will advance the slide valve to open position. Release of manual pressure will be followed by return of the valve to its open position by the tension of the springs 42, or of the arm 5i! whose use may render the employment of other springs unnecessary.

In operation, the workman starts with an empty hawk but with all connections made to the supply source from which the plaster is to be received whenever the slide valve I8 is manually operated to an open position. When ready, the workman opens the valve to release a desired quantity of the fluid plaster upon the top face of the hawk. The valve is then allowed to close, and the plaster thus deposited on the hawk may then be taken up by the trowel and applied to the surface of the wall or ceiling where the work is to be done. This operation may be repeated from time to time, as necessary, so that the workman is always assured of a supply of plaster whenever he operates the valve. It is unnecessary that the hawk carry any reserve supply of plaster, as is often done at the present time, but only enough to satisfy the immediate needs of the workman. It will be found that the weight of the hawk, plus that of the attached conduit, will approximate that of the conventional hawk due, in part, to the fact that the amount of plaster ordinarily carried by the present hawk is less than that which is now customary.

Plaster, even in the iiuid state, is of relatively gritty material whose ow is difiicult to control with a valve. I find, however, that a slide valve such as the one herein shown is entirely satisfactory for the purposes of this invention. It is relatively leak-proof, and will not abrade or wear unduly, and it is easy and dependable in its operation. One feature of advantage is that it is' so compact that it may be operated by the thumb of the same hand whose remaining fingers grip the handle of the hawk. It is, therefore, possible for one and the same hand to hold the hawk and manipulate the valve.

To maintain a balance in the frictional forces which are encountered with operation of the valve, it may be desirable to use two springs which are symmetrical with reference to the plane which proceeds centrally of the slide valve and axially of the opening which it uncovers. Also the few parts which are used in putting together this valve conduces to a carefree operation and also lightweight-both important factors in a plaster hawk of this kind.

I claim:

l. A plasterers hawk equipped with a supporting handle having therethrough a passageway opening out upon the top face oi the hawk, a valve extended crosswise of the handle for opening and closing the passageway therethrough, a flexible conduit connecting the lower end of the handle with a source of plaster supply for conducting plaster through the handle to the top face of the hawk subject to control of the valve, and valve-operating means arranged close to the handle in position for manipulation by the same hand which grips the hawk handle.

2. A plasterers hawk according to claim l in which a guide block with an opening therethrough is affixed between the handle and the under face of the hawk, and in which said valve is apertured and slidable and operatively fitted within the guide block to open and close the opening therethrough whereby to control the flow of plaster through to the top face of the hawk.

3. A plasterers hawk according to claim 1 in which a guide block with an opening therethrough is .afxed between the handle and the under face of the hawk, in which said valve is apertured and slidable and operatively tted within the guide block to open and close the opening therethrough whereby to control the flow of plaster through to the top face of the hawk, and in which spring means interconnects the slide valve and guide block to urge the valve to clo`sed position, the slide valve being provided with stop means engageable alternately with spaced points on the guide block to limit sliding movements of the Valve to substantially the minimum distance required for full opening or closing of the valve.

4. A plasterers hawk according to claim 1 in which spring means interconnects the valve and handle to induce movement of the valve crosswise of the handle, the spring means being arranged at opposite sides of the valve so as to exert in all positions of the valve a balanced force on opposite sides of a plane radially of the handle and lengthwise of the valve.

5. A plasterers hawk comprising, in combination, a reenforcing disc adjacent the under face of the hawk, a, block adjacent the under face of the reenforcing disc, there being in the upper face of the block a transverse channel closed over its top by the reenforcing disc, means interconnecting the block, disc, and hawk in unitary relation, there being registering openings through the hawk, disc, and block channel at a point substantially centrally of the hawk, a handle having its upper end portion entered through the said openings and in threaded engagement with the block, plate, and hawk and terminating substantially flush with the top face of the latter, means flexibly connecting the opposite end of the handle with .a source of plaster supply, a reciprocable valve fitted within the block channel to be guided thereby in its sliding movements, the valve being formed therethrough at one point with an aperture adapted to be brought into and out of register with the opening in the block channel whereby to open or close therethrough a passageway for the flowing plaster, and spring means in connection with the valve urging the same normally to a, closed position.

6. A plasterers hawk equipped with a supporting handle having therethrough a passageway opening out upon the top face of the hawk, a valve extended crosswise of the handle for opening and closing the passageway therethrough, a flexible conduit connecting the lower end of the handle with a source of plaster supply for conducting plaster through the handle to the top face of the hawk subject to control of the valve, and resilient valve operating means extended along the handle and movable toward and from the axis thereof arranged for manipulation inwardly by the same hand which grips the hawk handle, the valve operating means acting to return the valve outwardly when pressure thereon is relaxed.

7. A plasterers hawk equipped with a supporting handle extending downwardly from the lower face of the hawk and having a passageway opening out upon the top face of the hawk, a valve extending crosswise of the handle for opening and closing the passageway therethrough, a flexible conduit connecting the lower end of the handle with a, source of plaster supply for conducting plaster through the handle to the top face of the hawk subject to control of the valve, and valve operating means located closely adjacent the upper end of the handle in position for manipulation by the same hand which grips the hawk handle to control the flow of plaster to the top face of the hawk.

BYRON WM. DALTON.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,053,645 Reimer Feb. 18, 1913 1,158,460 Doll Nov. 2, 1915 1,716,317 Lowy June 4, 1929 FOREIGN PATENTS Number Country Date 375,741 Germany May 18, 1923

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