US2373886A - Pressure operated tool connector - Google Patents

Description

April 17, 1.945. D. F. GEIGl-:R`

PRESSURE OPRATED TOOL CONNECTOR Filed Oct.:8, 1943 Jmezjen v f/omey other fluid supply duct, It may be provided with a threaded union for connection with the valve body of male or female type.

The valve body C is swiveled freely by its forward end on the female coupling union E by a forwardly projecting nozzle F, said union being internally threaded at 2Q to engage the tread on the nipple of the service adapter A and hold said valve body C, service adapter A and nozzle F tightly and rigidly connected. In` this condition the forward tapering end of the nozzle' is firmly seated in the cup I I. The annular shoulder 2l provided on the nozzle serves to swivel the valve body C and union E during the act of iconnecting. The nozzle has a bore 22 extending from one end to the other, in which a valve sleeve G is adapted to reciprocate freely. e

The valve sleeve G is closed at its rearward end and open at its forward end, the latter open end making connection with the duct4 I2 leading to the fluid actuated tool B. The rearward end of the valve sleeve is provided with a neck 23 on the rearward extremity of which is a head 24, forming a deep annular channel 25. In this channel is seated a resilient valve disk H. lThe 'disk I-I and sleeve G produce a reciprocable check valve, the sleeve sliding freely in the bore of the nozzle. In the closed position of the valve unit as shown in Fig. 2, the valve disk seats against the rearward laterally extending flat end surface of the nozzle. In the open position of the valve as shown in Fig. 1, transverse port passages 21- through the side wall of the sleeve register with the chamber I5 in the service body and thus form a communication with the source of fluid supply through the valve body C and the hose adapter D. In the closed position of the valve sleeve when the service adapter `A is disconnected from the coupling union E and the fluid actuated tool is removed, -f

the valve sleeve G projects beyondv the forward end of the nozzle as shown in Fig. 2. `When the tool is connected the wall of the socket lIl in the service adapter A depresses the valve sleeve rearf wardly and causes the valve disk H to disengage from its seat at the inner end of the stroke of said sleeve, thus opening the port passages 21 through the sleeve. The disk valve is thin and freely elastic being composed of Neoprene, rubber or other suitable resilient material. The fluid pressure from the current of fluid supply stretches and cups the disks thus retaining its outer circumferential edge closed upon the rearward end of the nozzle as illustrated in Fig. 4, until the service adapter A is completely engaged by the coupling union E., whereupon at the latter part of the act of completing the connection of the tool with the source of fluid supply the valve disk snaps open into normal position, substantially without loss or escape of fluid. This feature has been found to be important as among other advantages it reduces hazard from fire and explosion to a minimum. Normally the fluid pressure delays the opening of the valve by cupping and stretching the disk and retaining its rim sealed f the service adapter A and coupling union E, when these parts are tightened together.

The section on line 3-3 of Fig. 2, shown in Fig. 3 is typical of the exterior hatv sides such as I4 provided on the valve body C, hose coupling D,

coupling union E, adapter A and stock portion of the fluid actuated tool B, for engagement by a wrench or other holding device to facilitate screwing the various parts of the structure tightly together or disjointing them. l

The valve unit which is free to reciprocate in response to positive or negative pressure in the valve chamberA Within the valve body is double acting and in reverse reciprocable position the elastic valve disk H seats against the forward at surface 30 of the hose adapter D and closes the longitudinal duct 3l therethrough by back pressure created when a torch or other tool back fires. In this manner both gas and oxygen passages may be caused to close automatically until pressure in'a torch returns to normal. The instant the back nre occurs the propagation of llame inside of a torch is snuffed out. It will be noted that in the open position of the valve unit when a fluid actuated tool is connected the forward current of actuating fluid normally keeps the valve unit from closingrearwardly over the supply duct in the hose adapter, that is except when a back re occurs.

The invention is equally applicable when various forms of unions, nipples, adapters 0r other connecting elements are employed and it is within the spirit of the invention to modify the structure to meet such use. construction of the reciprocable fioat valve unit is disclosed in which the sleeve member G isdouble in form, its two opposite ends being slidably supported both in the nozzle F and the bore of the hose adapter D. The valve disk H seats against the rearward flat end of the nozzle as above described andv is mounted in the annular channel 35 in the solid body 36 midway between the ends of the sleeve. The back pressure valve however for closing the supply duct in the hose adapter in case of a back fire is formed by a rearwardly tapering valve 31 on the body 36, which closes against the rim of a rearwardly tapering recess 38surrounding the sleeve G. Transverse port passages S9 entering both end sections of the sleeve are also provided vand connect with the sourceof fluid supply automatically when the fluid actuated tool is connected` In Figs. 6 and 7 the valve sleeve G is double in form and adapted for use in connection with the construction shown in Figs. 1 and 2 in place of the sleeve shown therein. In this construction a pair of resilient valve disks 40 and 4I in place of one are mounted in suitable annular channels 42 and separated by a thin annular n 43. The forward one of these valve disks is adapted to close against the rearward flat end wall seat of the nozzle as in the construction shown in Figs. l and 2, while the other valve disk `functions to close under reverse action against the forward vend wall 30 and around the inner edge of the passage throughlthe hose adapter. Transverse connecting passages 44` entering the end sections of the sleeve are also provided and form a communication between the ducts through the service adapter A and the hose Aadapter D in the open position of the valve unit.

In accordance with the patent statutes, I have described the principles of operation of my invention together with the construction thereof which I now consider to represent the best embodiment thereof, but I desire to have it understood that the-mechanism shown is only illus-y trative and that the invention can be carried out those above set forth within the spirit thereof In Fig. 5 an alternative and without departing from the scope of the following claim. l

I claim: l v A connector' for a fluid actuated tool, comprising, a valve body containing a valve chamber,

@having a passaged rearward extension for the admission of fluid under pressure into the valve chamber and provided with a rearward flat valve seat encircling said passage, a forwardly. extending nozzle seated in said body containing a lon-l gitudinal bore and having an inner flat valve seat in said chamber encircling said bore, said valve seats being opposed to each other in said valve jsleeve reciprocable longitudi` projecting forwardly bechamber, a nally in said bore and yond said nozzle having an integral head on its inner end, an

and ported through its side to communicate with of the valve sleeve, a

annular channel back of said head the valve chamber in the rearward open position freely flexible valve disc retained in said channel and adapted to alternately close upon said seats and function under delayed action and snap open when the valve sleeve is projectedinwardly and the portopening in its side registers with the valve chamber, and a fluid actuated tool having threaded coupling means swiveled on the forward end of said nozzle, adapted when engaged to depress said 'sleeveinto its j rearward open position and connect the tool with said valve chamber. y

' Y DAVID F. GEIGER.

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