초록 ▼

Pressure regulating mechanically operable valves intended primarily for use as pressure regulating shut off valves are disclosed. The valves utilize a simple piston assembly operative between a valve open position and a valve closed position responsive to a spring biasing the assembly toward the ope

Pressure regulating mechanically operable valves intended primarily for use as pressure regulating shut off valves are disclosed. The valves utilize a simple piston assembly operative between a valve open position and a valve closed position responsive to a spring biasing the assembly toward the open position against an opposite force proportional to the outlet pressure. The piston assembly may have only a single seal to seal the assembly against leakage with a mechanical shut off mechanism operative on only a 180 degree rotation thereof being cooperatively disposed with respect to the piston assembly so as to not require any additional seals. An electrically operable unlatching means is provided to close the valve upon receipt of a pulse from a battery or other electrical system, exemplary circuits, including a unique moisture sensing system are enclosed.

대표청구항 ▼

A pressure regulating electrically operable shut off valve comprising a housing including inlet and outlet chambers and a valve seat therebetween for fluid communication between said chambers, a valve closure member cooperatively disposed in said housing with respect to said valve seat so as to be e

A pressure regulating electrically operable shut off valve comprising a housing including inlet and outlet chambers and a valve seat therebetween for fluid communication between said chambers, a valve closure member cooperatively disposed in said housing with respect to said valve seat so as to be encouraged by pressure in said outlet chamber toward a first position resting on said valve seat to block fluid communication between said inlet and said outlet chambers, said valve closure member being movable to a second position allowing fluid communication between said inlet and said outlet chambers, electrically operable latch means spring means coaxial with said valve member and operative in compression between said valve member and said latch means, when said latch means is in a first latch position, for yieldably encouraging said valve member toward said second position, whereby said valve may regulate the pressure of fluid in said outlet chamber by at least a partial balance between the outlet chamber pressure force on said valve closure member encouraging said valve closure member toward said first position and the force of said spring means encouraging said valve closure member toward said second position, said latch means being moveable between said first latch position holding said spring means in compression and a second latch position releasing the compression in said spring means, said latch means having permanent magnet means for retaining said latch means in said first latch position, said latch means also having a coil responsive to a current pulse to momentarily substantially demagnetize said permanent magnet means to allow said latch means to move to said second latch position, and means operative when said spring means is released to encourage said valve closure member to said first position.