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특허 상세정보

Pressure-responsive shut-off valve

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F16K-015/18   
미국특허분류(USC) 137/4937 ; 137/322 ; 137/51629 ; 141/21
출원번호 US-0259724 (1981-05-01)
발명자 / 주소
인용정보 피인용 횟수 : 44  인용 특허 : 2
초록

A combined manual and pressure-responsive shut-off valve, intended particularly for use with high pressure gas cylinders, is disclosed. The valve includes a single seat and a single plug, the plug having a first sealing surface for closing against a low residual pressure in the cylinder and a second sealing surface for closing against a relatively high cylinder pressure. A pressure-responsive actuator engages the first sealing surface against the seat whenever pressure in the cylinder falls below a predetermined minimum. A manual actuator engages the sec...

대표
청구항

A shut-off valve for use with a pressurized gas cylinder, said shut-off valve comprising: a body having an inlet port, an outlet port, and a passageway therebetween; a seat disposed in the passageway; a plug having a soft surface for sealing against the seat to contain a relatively low pressure at the inlet port and a hard surface for sealing against the seat to contain a relatively high pressure at the inlet port, said soft and hard surfaces being axially spaced apart so that the soft surface engages the seat before the hard surface engages the seat; pr...

이 특허를 인용한 특허 피인용횟수: 44

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