Patent ID: 6758238
Filing Date: 2004-07-06
Classification: G05D,Y10T

Abstract:
A regulator valve for regulating fluid pressure and selectively stopping fluid flow, comprising:a housing defining a hollow enclosure, an inlet end and an outlet end, a partition formed in said housing and located between said inlet end and said outlet end, a flow passage extending through said partition, a valve member positioned in said housing and movable towards and away from fluid sealing contact with said partition when acted upon by fluid pressure in said inlet and said outlet ends, a spring biasing said valve member away from said fluid sealing contact with said partition, secondary biasing means for selectively effecting relative movement between said valve member and said partition to move them into sealing engagement with one another and thereby close said flow passage, a valve stem extends from said valve member and terminates in a distal end connected to a first flexible seal positioned to be acted upon by fluid pressure in said inlet end of said housing to bias said valve member towards fluid sealing contact with said partition, said secondary biasing means including a control chamber located out of operative engagement with said first flexible seal and said valve stem to permit control pressure to be introduced into said control chamber to overcome said bias of said spring, a control stem positioned in said control chamber and having a distal end connected to a second flexible seal which is positioned to be acted upon by fluid pressure in said control chamber to overcome said bias of said spring which is acting upon said second flexible seal and said distal end of said control stem, and an opposite end of said control stem engaging said distal end of said valve stem to transmit said spring bias to said stem valve.