Resiliently seated fluid control valve

Claim 1

A FLUID CONTROLLED VALVE COMPRISING: A PORTED VALVE SEAT MEMBER HAVING A STIRRUP AND A BASE CONNECTED THERETO AND EXTENDING FROM OPPOSITE SIDES THEREOF, A TEMPERATURE SENSITIVE POWER UNIT HAVING A CASING CONNECTED TO SAID BASE AND A POWER MEMBER RELATIVELY EXTENSIBLE THEREFROM, SAID POWER MEMBE HAVING ONE END THEREOF EMBRACED BY SAID STIRRUP FOR PROVIDING RELATIVE MOVEMENT OF SAID CASING, VALVE MEANS EXTENDING FROM SAID CASING AND OPERATIVELY CONNECTED THERETO FOR EFFECTING AXIAL MOVEMENT OF SAID VALVE MEANS WITH RESPECT TO SAID PORT WHEN A PREDETERMINED AMBIENT TEMPERATURE IS REACHED, A PRIMARY VALVE INTEGRALLY FORMED WITH SAID VALVE MEANS AND SEATABLE ON SAID VALVE SEAT MEMBER, A GROOVE FORMED IN SAID VALVE MEANS ON THE DOWNSTREAM SIDE OF SAID PRIMARY VALVE HAVING A PAIR OF TAPERED WALLS WHICH COOPERATE TO DEFINE AN UNDERCUT OPEN END, AN O RING COMPOSED OF A RESILIENT MATERIAL AND HAVING A DIAMETER IN ITS UNSTRESSED CONDITION WHICH IS GREATER THAN THE WIDTH OF THE OPEN END FOR LOCKING SAID O RING IN SAID GROOVE AND HAVING A CROSS-SECTIONAL AREA LESS THAN A CROSS-SECTIONAL AREA OF SAID GROOVE AND BEING INITIALLY SPACED FROM A BOTTOM WALL OF SAID GROOVE, SPRING MEANS BIASING SAID PRIMARY VALVE AND SAID O RING IN A CLOSED POSITION, WHEREBY SAID PRIMARY VALVE AND SAID O RING COOPERATE TO EFFECT A FLUID TIGHT SEAL WITH SAID VALVE SEAT MEMBER.