US2195811A - Flow controlled gun - Google Patents

Description

April 2, 1940.

S; BRAMSEN El' Al.

mow cgufmonngp @un -'ilcd Jun 3 11938 ,2 Sheets-Sheet 2 Patented Apr. v2, 1946 UNITED .sTATas FLOW coN'raoLLEn con Svend Bramsen and Fred W. Wahlin, Chicago,

Ill., asslgnors to Binks Manufacturing Company, Chicago, Ill., a. corporation of Delaware Application June 3, 1938, Serial No. 211,584 j 3 Claims. (Cl. 299-150) Our invention relates to a ow control device by which the user can conveniently control the discharge of material, particularly viscous material, which is forced through a hose and through 5 the control device merely bythe pressure under which the material is supplied, and whereby the user also can comfortably hold the device in a given position while causing the material to be projected in considerably varying directions.

10`- No atomizing'air is used, but the material simply ows by the pressure imposed on the material at its supply source and along a substantially straight path.'

More particularly, our invention relates to a conveniently controllable flow control device of the general type mentioned which will be advantageous for controlling and directing the discharge of such materials as asphalt (cut-back and emulsied asphalt and similar heavy materials),

ge rubber compositions (as rubber cement) as used forl sealing joints, or sound deadening materials which are to be projected into hollow Walls of buildings or automobile bodies and parts thereof,

as automobile doors, refrigerators, etc., as also Moreover, for such sluggishly owing materialsl the discharge controlv device should be constructed so as to reduce the likelihood of having g@ the material clog and dry within the device, so

as to avoid the otherwise needed frequent cleaning and the corresponding interruptions in the use of the device. Accordingly, in the device of the present invention any necessary element, such dit as the valve, is so constructed as to omit any corners or similar projection whereby the movement of the material is made as smooth and clirect as possible. 'I'he present invention, therefore, comprehends the provision in such a device do of a passage for the material the portions of which are so arranged as to be at wide obtuse angles whereby the iiow of the material will be along a more or less direct path without the turning about sharp corners or bends, and withsa out any protruding part to act as an obstruction flow of the material through the device.

or to offer resistance to the free movement of the material.

Intermediately of the length of the passage, preferably at the junction of the passage portions, there is provided a valve chamber in which 5 al valve head is adapted to operatathe valve head moving in the same direction of movement of the material when closing and in an opposite direction when opening. The valve chamber is designed to have at .its rear portion an extension 1a" so that the valve head may be retracted far enough to give ample clearance for the passage of the material from oneto another portion of the passage past the front of the valve head.

'I'he valve is so connected and arranged that l5 as it is retracted it will have a space left behind the valve head and in the rear of the chamber extension so that-the valve head will not stick and make it diilicult for the valve head to move to closed position when it is desired to stop the a@ The valve means comprises a stem which preferably is slidable along an axis alined with the axis of the outiiow passage portion for the material, and

a spring normally urging the valve toward closed 25 position. 'By having the valve move in thev direction of movement of the material when closing the valve, the material will help in so closing, the valve. Y

As another feature of thefinvention is the provision of a novel connection between the manually controlled trigger and the valve stem. The trigger carries a pair of spaced rocker elements having curved contact surfaces contacting with an abutment element connected to the free end of the valve stem, the` latter extending through the space provided between the rocker elements. These curved surfaces are so designed thatl the lines of force at the contact points will always be parallel to the axis of the valve stem, regardo less of the position of the trigger, and the' relative rocking relation of the rocking elements and the contacting abutment element on the valve stem. The abutment element is adjustable so as to control or regulate the position of the valve head ga with relation to the valve chamber extension. The trigger is so connected and arranged as to have a limit stop at which point the rearward or opening movement of the valve is determined, this feature being varied by the adjustment of dll the abutment element on the valve stem.

Other objects, capabilities, advantages, features and the like are comprehended by the invention as will later appear and as are inherently possessed by the invention. e gg Referring to the drawings:

Fig. 1 is a side elevation of a flow-discharge control gun embodying our invention, showing this with the control parts in their valve-closing disposition and with the discharge nozzle positioned for directing the flow of material forwardly downward;

Fig. 2 is an enlarged central, longitudinal and vertical section through the same gun, showing the discharge nozzle positioned for directing the ow forwardly upward;

Fig. 3 is a fragmentary horizontal section taken along the line 3-3 of Fig. 2;

Fig. 4 is a front elevation of the forward portion of the control lever, drawn on a larger scale v than Figs. 1 and 5;

Fig. 5 is an enlargement of the major portion of the section of Fig. 2, taken when the control lever has fully opened the now-control valve of the gun;

Fig. 6 is a still more enlarged side elevation oi' a part of the discharge nozzle of the gun:

Fig. 7 is an enlarged part sectional and part plan view of portions of the control valve, showing the swiveling connection of the head of the valve to the valve stem;

Figs. 8 and 9 are sections taken respectively lngS the correspondingly numbered lines of Fig. 10 is an enlargement of a part of the structure shown in Flg. 5, showing the section of the part of the gun body which houses the forward guide for the stem of the valve; and

Fig. 11 is an enlarged perspective view of the forward guide.

Referring more in detail to the drawings, the embodiment selected t0 illustrate the invention is shown as having the body I of the gun in unitary form, as a casting, and comprising a long tubular portion 2 normally disposed at an incline to the horizontal when in use, the rear end of the tubular portion 2 being threaded for the coupling thereto of the material supply hose or the like (not shown). At the forward end of the tubular portion 2 the body of the gun comprises a chambered portion 3 having a large chamber 4 with which the passage of the tubular portion 2 directly communicates, the chamber 4 being of larger size than the cross-sectional size of the passage in the tubular portion 2. The chambered portion 3 has a forward extension 5 suitably formed and threaded for the coupling of a swivel type of discharge nozzle, later described.

The body I also comprises a tubular portion 6 forming a rearward extension from the chambered portion 3 and serving as a support for a guide means for the valve stem, also later described, and a second tubular portion 1 rearwardly spaced from the extension 5 and in axial alinement therewith, the portion 1 serving as a guide means for the valve stem and for housing a spring operatively associated therewith, as later described. All portions 5, 8 and 1 are in axial aline-- 'ment as shown. The portion 2 is at a wide obtuse angle to the forward extension 5. The extension 5 may be provided with an integral suspending eye 8 by which the gun may be suspended to relieve the user of supporting the weight of the gun and attached hose, and the material therein.

The extension 6 is suitably bored to provide for the reception of packing 9 and is threaded to receive a tubular threaded guide member I0 for guiding the valve stem II of the valve, the member III also serving as a gland for the packing.

The member III may have suitable tool slots I2 for the application of a suitable adjusting tool, such as a screw driver or the like. The forward portion of the extension 6 is bored to a larger diameter than the valve stem II so as to provide therearound an annular chamber I3 and is also counterbored to form a cone shaped chamber I 4 between the chambers 4 and i3, the chamber I3 forming a rear extension to the chamber I4.

On the forward end of the valve stem is carried a valve head I5 (see Fig. '1) of double conical form, the forward conical portion I6 of which serves as the seating part of the valve, and the rear conical portion I1 of which extends into the conical chamber I4 when the valve is opened as later more fully described.

The valve stern II extends rearwardly through an opening I8 provided between the alined body portions 5 and 1 and into the tubular portion 1, and has a shouldered part against which abuts a guiding collar I9 slidable in the chamber of the tubular portion 1. Between the collar I9 and a cap 2U threadedly engaged in the rear end of the tubular portion 1 is a spring 2l which normally acts to close the valve. The valve stem II extends rearwardly with a reduced diameter portion 22 which passes through the cap 20 and has its rear end threaded to adjustably receive a thrust nut 23 and a lock nut 24.

Between the tubular portions 2 and 1 the body I of the gun is provided with a preferably integral reinforcing or strengthening,web 25. The rearportion of this web is suitably flanged for strength and has a bearing pin carrying hub 26 in which is located a pin 21 set in the hub by a set screw 28. Upon the free ends of this pin is pivotally mounted a generally L-shaped trigger or hand lever 29 having a handle or hand engaging part 30 and an upwardly extending operating arm 3l. The handle part 3D extends along over the tubular portion 2 so that as the part 30 is operated by the hand of the operator the lower end 32 thereof will contact with the tubular portion 2, the latter thus acting as a limit stop for the lever 29 when operated to open the valve of the gun. The lever arm 3I carries a pair of spaced thrust lugs 33, preferably integral with the arm 3|, between which rearwardly extends the stem part 22, and the rear surfaces of the lugs 33 are curved, convexly, to rockably contact the thrust nut 23. The curved contacting surfaces of the lugs 33 are so curved that as the lever 29 is rocked to effect movement of the valve stem the lines of force at the points of contact between the lugsA 33 and the thrust nut 23 will always be parallel to the axis of the valve stem, thus avoiding any tendency to a cramping of the valve stem. The valve head I5 has a chamber 34 (see Fig. 7) into which extends the forward end of the valve stem portion II, such forward end of the stem comprising a head 35 made by reducing the diameter of the stem Il to form a neck portion 3E, thus providing an annular shoulder 31 against which may abut an inwardly directed annular flange 3B provided at the rear open end of the head I5. The chamber or socket 34 is larger than the head 35 so that the valve head may have a certain amount of play or angular movement whereby the seating part IS will readily accommodate itself to the seat provided at the rear end of the discharge nozzle later described.

The discharge nomic comprises a bent swivel portion 39 and a tip portion 40, the latter having a tapered orifice portion 4I. The portion 40 is suitably coupled to the swivel portion by a coupling nut 42, and the swivel portion 39 is coupled to the body portion 5 by a coupling nut 43. The portion 39v has tubular parts 44 and 45 at a wide obtuse angle to each other, with the part 44 coaxial with the body portion 5 and the part 45 coaxial with the tip portion 4t. The forward end of the part 5 is flared to receive a tapered portion 46 of the part 44 to act as a swivel joint vwhereby the nozzle may be rotated about the common axis of the parts 44 and 5 for directing the nozzle part d0 in different directions, such as shown in Figs. 1 and 2. The rear end of the part 44 is beveled or chamfered to provide a sealing seat il for the cone shaped forward portion it of the valve head l5.

The device is so designed as to have the passages ofthe tubular portion and of the nozzle parts 39 and Ml, as well as the chamber il, all as nearly in alinement as is possible in in a mechanism of this kind, wherein the moving or flowing material, which is very viscous and slu'ggish, will have as direct a path as possible without any sharp turns or bends and projecting parts, as corners and the like, to offer resistance to the free and unimpeded movement of the material through the gun. The axes of the tubular portion 2 and of the nozzle portions 39 and itl are at a wide obtuse angle to each other and the chamber il is relatively large and in line with the passages of the portions referred to.

The valve is so Idisposed that the valve head l moves toward closing position with the forward movement of the material, the spring 2l normally actingl to close the valve or to maintain it closed when the trigger 2t is not depressed. The pressure of the material in the device will also contribute to the closing action of the valve.

When the trigger 29 is depressed by the user, the valve is withdrawn from its seat, from its position as shown in Fig. 1 to the position shown in Fig. 5. The cone shaped chamber it at the rear of thevalve head conforms substantially in shape to the rear cone portion il of the valve head so that as the valve head is moved rearwardly' it will practically completely clear the upper or forward end of the passage of the tubular portion 2 to afford a free and unobstructed movement of the material through the chamber t to the nozzle part 39. Also, as the valve head l5 moves rearwardly', because of the shape of the head portion ll and the chamber la, the material cannot pack behind the valve head and block its movement, but will be readily displaced and caused to pass around the valve head l5. Furthermore, the length of the valve stem l l-22 and the shape and size of the trigger 2d, par ticularly the arm 30, are so designed that when the end 32 of the arm 3U comes to a stop against the tubular portion 2 of the gun (see Fig. 5) the part il of the valve head l'will be spaced forwardly of the cone shaped wall of thecharnber i4 to provide room for some of the material behind the valve head and to prevent the sticking of the valve in its rearward position whether by reason of adhesion, suction or otherwise. The amount of spacing between the valve head i5 and the rear wall ofthe chamber lil may be varied at will by adjusting the thrust nut 23 on the threaded end of the valve stem portion 22. The providing of the annular chamber i3 around the necked portion 3S of the valve stem also affords a freedom of movement of the valve and valve stem and prevents the clogging and sticking of the valve stem.

While we have herein described and upon the drawings shown an illustrative embodiment of the invention, it is to be understood that the invention is not limited thereto but comprehends other constructions, details, arrangements of parts, features, and the like without departing from the spirit of the invention.

Having thus disclosed the invention, we claim:

1. A flow control device for viscous material under pressure, comprising a body havingv an upper forward tubular portion provided with a valve chamber, an upper rear tubular portion spaced from and in line with said forward tubular portion, and an inclined lower tubular portion communicating at its forward and upper end with said valve chamber, a tubular nozzle having a swivel connection with the forward end of said forward tubular portion and having its rear end extending into said forward tubular portion at the forward end of said valve chamber, said rear end of said nozzle having a valve seat, a valve for seating on said seat, a v'alve stem connected to said valve and extending rearwardly through said valve chamber and the rear end of said for= ward tubular portion and also through saidk rear tubular portion with the Arear end of the stem extending beyond the rear end of said rear tubular portion for engagement with a trigger, a trlg= ger pivotally mounted on said body rearwardly of said rear tubular portion and having an arm provided with means for engaging the rear extending end of said stem, and spring means in said rear tubular portion for normally pressing the stern forwardly for-closing said valve.

2. A flow control device for viscous material under pressure, comprising a body having an upper forward tubular portion provided with a valve chamber, an upper rear tubular portion spaced from and in line vwith said forward tubular portion, and an inclined lower tubular portion communicating at its forward and upper end with said valve chamber, a tubular nozzle having a swivel connection with the forward end of said forward tubular portion and having its rear end extending into said forward tubular portion .at the forward end of said valve chamber, said rear end of said nozzle having a valve seat, a valve for seating on said seat, a valve stem. connected to said valve and extending rearwardly through said valve vchamber and the rear end of said forward tubular portion and also through said rear tubular portion with the rear end of the stem extending beyond the rear end of said rear tubular portion for engagement with a trigger, a trigger pivotally mounted on said body rearwardly of said rear tubular portion and having an arm provided with means for engaging the rear extending end of said stem, and spring means in said rear tubular portion for normally pressing the stem forwardly for closing said valve, said valve chamber having a rearwardly tapering chamber portion, and said valve having a rearwardly tapering valve portionfor entry into said chamber portion when opening the valve to dis place the viscous material lodged in said chamber portion and prevent blocking of the opening of the valve.

3. A now control device for viscous material under pressure, comprising a body having an, upper forward tubular portion provided with a valve chamber, an upper rear tubular portion spaced from and in line with said forward tubular portion, and an inclined lower tubular portion communicating at its forward and upper end with said valvechamber, a tubular nozzle having a swivel connection with the forward end of said dit.

forward tubular portion and having its rear end extending into said forward tubular portion at the forward end of said valve chamber, said rear end of said nozzle having a valve seat, a valve for seating on said seat, a valve stem connected to said valve and extending rearwardly through said valve chamber and the rear end of said forward tubular portion and also through said rear tubular portion with the rear end of the stem extending beyond the rear end of said rear tubular portion for engagement with a trigger, atrigger pivotally mounted on said body rearwardly of said rear tubular portion and having

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