|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||137/6255 ; 251/31 ; 251/33 ; 251/35|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 7 인용 특허 : 0|
A quick-acting isolating valve including a valve body having a fixed seat defining an opening through which fluid may flow and co-acting therewith a movable head carried on a stem which is provided with a piston reciprocable in a piston chamber formed in the valve body, there being a fluid outlet from the chamber permitting discharge of fluid from the chamber upon movement of the piston within the chamber when the movable head moves toward or away from its fixed seat and means for effecting progressive restriction of fluid flow through the outlet as the ...
A quick acting isolating valve comprising in combination a valve body having a fixed seat defining an opening through which connected system fluid may flow in a path between an inlet and an outlet, a moveable head adapted to cooperate with said seat to open and close said opening to fluid flow, said head being carried on a stem which is provided with a piston reciprocable in a piston chamber formed in the valve body substantially isolated from the fluid flow path, means operatively effective for applying system pressure to both sides of said piston, auxi...