GB728415A - Improvements in or relating to valve assembly - Google Patents

Abstract

728,415. Storing gases under pressure; forcing liquids by gaseous pressure. RONSON ART METAL WORKS, Inc. March 10, 1953 [March 27, 1952; June 20, 1952], No. 6552/53. Classes 8 (2) and 102 (2). [Also in Groups XI and XXIX] A valve assembly for use in the injection of fluid under pressure from a container to a reservoir, e.g. in filling the reservoir of a .liquefied gas fuelled cigarette lighter, comprises a spring-urged piercing pin member having at one end a cutting edge shaped to cut and bend in a tab of the end closure material of a cartridge nozzle when advanced in holding means to be pressed into engagement with such edge and sealing ring means adapted to be in sealing relationship with the spring-urged pin member to close the valve and with the cartridge nozzle during its advance in the holding means prior to piercing by the pin member and during the piercing when the seal with the pin member is open. As shown in Fig. 4, a piercing pin member has a shoulder 44 with a cut-out portion 45 and a grooved end 46 extending from the portion 45 at an angle towards the tip to terminate in a semi-circular knife-like cutting edge 41 which engages with the end of a cartridge nozzle 24, Fig. 2, as this latter is advanced by screwing, for a reservoir filling operation, into the valve housing 16 secured as by a screw threaded portion 12 into a wall portion of the reservoir, the pin member being urged by a spring 35 so that before contact by the nozzle an inclined shoulder portion 31 of the pin member is in sealing contact with an "O"-ring 32 held against an internal shoulder 34 of the housing. Before contacting the pin member in its advance, the nozzle 24 comes into sealing contact with a "D"-ring 28 held in the housing. Further advance of the nozzle contacts the end 41 of the pin member which is free to rotate with the nozzle but is depressed against pressure of the spring 35 to open the seal between its shoulder 31 and the ring 32 finally being forced to a stop by contact of its lower end with the bottom of the housing when further advance of the nozzle causes the end thereof to be pierced by the pin member to cut out and bend upwardly a flaplike tab 47 to allow flow of the fuel from the nozzle down the 'grooved end 46, through the space between the shoulder 31 and sealing ring 32 and an opening 27 in the housing wall, into the reservoir. A removable cap may be screwed into the housing in place of the nozzle after a filling operation, the cap having a depending flange to make sealing contact with the sealing ring 28. In an alternative construction the end of the housing is formed as a bushing-like member designed so that the fluid instead of escaping through opening 27, escapes around and between the bushing-like member and the inside of a bore in the end of the housing accommodating the said bushing- like member. In a modification the two sealing rings 28, 32 may be combined in a single sealing ring of such shape that the nozzle forms with it a sealing joint before it pushes the pin member away from the ring to break its seal with the ring. The pin member may be formed with a disc-like upper end with an arcuate cutting edge at the mid portion of the upper surface and a cavity with a conical surface internally of the cutting edge to provide a clearance permitting the fuel to escape from the pierced nozzle.