Patent GB-856274-A (GB)
Title: Improvements in or relating to fluid control valves
IPC: F16K7/12
Filed: 1957-02-18
Abstract: 856,274. Valves. REGIE NATIONALE DES USINES RENAULT. Feb. 18, 1957 [Feb. 18, 1956; April 23, 1956], No. 5505/57. Class 135. A conical ring 6, Fig. 1, which is retained in the valve body 1 by an annular nut 4 serves to clamp a conical closure member 8 in position and against a seat 13 at the lower end of a passage 14 through the ring; the closure member 8, which is made of rubber or other elastic material, embodies a ring-section rim disposed in a groove 9 provided between the ring 6 and body 1, a part spherical apex and a number of openings in its conical periphery. A press button 15 covers the top of the body, the button having a guide sleeve 16 with ports 17 therein open to atmosphere and a depending stem 18 with a flange 20, the stem passing through the passage 14 and abutting the closure member apex. Pneumatic pressure in the inlet 3 acts in conjunction with elastic tension in the closure member 8 to sealingly seat the latter; upon depressing the button 15, the stem 18 unseats the closure 8 to enable the fluid to pass through the openings in the latter, the passage 14, grooves 21 in the flange 20, cavities 22, 24 and ports 17. When the button 15 is released, the tension in the closure member returns the valve to the closed position. The force required to open the valve is small since the openings in the closure member enable fluid to occupy the space between the walls of the latter and the ring 6, so setting up a counter-pressure. In a modification, an outlet connection 28, Fig. 5, is located adjacent the inlet 27 whilst an additional elastic valve closure 52 is disposed in a bore in the nut 46, this closure comprising three integral rings 53, Fig. 7, with axial grooves 54 and a lip 55; the nut 46 has upper and lower diametrical slots 57, 47, Fig. 5, respectively. In the inoperative position the outlet 28 is open to the atmospheric ports 70 via slots 47, grooves 54 and slots 57 whilst upon depressing the button 59 the stem 64 firstly urges the lip 55 on to its seat 56 to close off the path to the ports 70 and secondly unseats the main closure member 62 to connect the inlet 27 and outlet 28 through the openings in member 62, passage 65 and slots 47 until the button is released. In another modification (Fig. 4, not shown), the additional valve closure and atmospheric ports are dispensed with. In a further modification, the inlet is directly in the bottom of the body 71, Fig. 8, whilst the closure member includes a cap part 78 that co-operates with the seat 79, the diaphragm part 75 between the part 78 and the toric ring 72 being reinforced by bar elements; the cap part 78 has an extension 81 which coacts with guides 82 in body 71. The central portion of the stem 84 is conical whilst the button guide sleeve 91 includes axial slots 92 terminating in holes 93 so that the sleeve is sufficiently elastic to move over the elastic locking ring 95. When the button 88 is depressed the inlet is connected to atmosphere by the axial and radial passages 80, and the slots 92 and holes 93. In another modification (Fig. 9, not shown), the atmospheric slots and holes are replaced by an outlet connection that opens to the axial passage through radial passages in a seat member held in place by the nut with an interposed packing. Threaded fixing holes are formed through the body. In a still further modification (Fig. 10, not shown), atmospheric outlet ports are also provided and the stem is formed as an additional valve closure having a seat made from a double toric elastic packing ring, the whole functioning as in the Fig. 5 embodiment. In another modification (Fig. 11, not shown) the passage to the atmospheric ports contains a tapered valve closure to regulate the flow or cut it off entirely. The push-button in each of the above embodiments may be actuated by an automatically controlled cam or electromagnet. In a further modification, the valve closure 143, Fig. 12, is inverted and connected to the armature 144 of an electromagnet 139 fixed to a hood 146 which is similar to that shown in Fig. 8. The closure 143 is retained between the body 133 and a ring 135 by a nut 136 in which is the radial passage 154 leading to the atmospheric ports in the body and hood; the ring 135 also forms the valve seat 137. Specification 856,275 is referred to.