Collapsible type cartridge valve

Claim 1

A VALVE COMPRISING: A HOUSING HAVING A BORE THEREIN AND BOTH AN INLET AND AN OUTLET COMMUNICATING WITH SAID BORE, SAID INLET BEING AT ONE END OF SAID BORE, AND THE OTHER END OF SAID BORE BEING OPEN, A RESILIENT VALVE SEAT INSERTABLE INTO SAID BORE SURROUNDING SAID INLET, A CAGE RECEIVED WITHIN SAID BORE AND IN ENGAGEMENT WITH SAID VALVE SEAT, SAID CAGE HAVING ONE OR MORE OPENINGS THEREIN PERMITTING FLOW THERETHROUGH, A COLLAPSIBLE, RESILIENT VALVE ELEMENT RECEIVED WITHIN SAID CAGE, AND HAVING A SEATING SURFACE ON ONE END, SAID SEATING SURFACE BEING ENGAGEABLE WITH SAID SEAT WHEN SAID VALVE ELEMENT IS IN A RELAXED CONDITION, SAID VALVE ELEMENT HAVING A PERIPHERAL FLANGE ON THE END THEREOF OPPOSITE SAID SEATING SURFACE, SAID FLANGE OVERLAPPING SAID CAGE, SAID VALVE ELEMENT FURTHER HAVING FOLD MEANS THEREIN TO FACILITATE COLLAPSING THEREOF IN RESPONSE TO INLET FLOW PRESSURE ACTING ON SAID SEATING SURFACE, A MEMBER DETACHABLY SECURED WITHIN THE OTHER END OF SAID BORE, SAID MEMBER ENGAGING SAID FLANGE AND CLAMPING SAID CAGE, SAID VALVE ELEMENT AND SAID SEAT IN POSITION, WHEREBY TO FORM A SEALED UNIT CLOSED EXCEPT FOR SAID INLET AND SAID ONE OR MORE FLOW OPENINGS, AND MEANS PROJECTING THROUGH SAID MEMBER AND ENGAGEABLE WITH THE SAID VALVE ELEMENT ON THE BACK SIDE OF SAID SEATING SURFACE, AND OPERABLE TO SECURE SAID SEATING SURFACE ON SAID VALVE ELEMENT IN ENGAGEMENT WITH SAID SEAT.