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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||137/72 ; 137/74 ; 251/167 ; 251/196|
|발명자 / 주소||
|출원인 / 주소||
|인용정보||피인용 횟수 : 6 인용 특허 : 1|
A valve (10) having an expansible gate assemblage of ported juxtaposed gate and segment members (18, 19) which are movable into sealing engagement with upstream and downstream valve seats (28) about the flow passage (12, 14) in the open and closed conditions of the valve wherein the valve includes pressure relief means which relieves excessive pressure in the valve chamber (11) into the upstream flow passage (12) when the environment in the chamber reaches a preselected temperature with the valve retaining capability of providing an upstream seal in the ...
In a gate valve having a valve body with inlet and outlet flow passages defining a flow way through said valve, a valve chamber in the body communicating with said flow passages, opposed aligned valve seats in said valve body surrounding the inlet and outlet flow passages and exposed to said valve chamber, an expansible ported gate assembly movably mounted in the valve chamber for rectilinear movement across said flow way between a first position wherein the valve is open and a second position wherein the valve is closed, said assemblage including ported...