Vacuum breaker

Claim 1

IN A VACUUM BREAKER DEVICE FOR A FLUID SUPPLY SYSTEM, THE COMBINATION COMPRISING: A FLUID CONDUIT DEFINED BY AT LEAST ONE WALL MEMBER AND HAVING AN INLET END AND AN OUTLET END; CONNECTOR MEANS FOR ATTACHING SAID CONDUIT TO SAID FLUID SUPPLY SYSTEM; AN INTERNAL SLEEVE MEMBER POSITIONED IN SAID CONDUIT AND EXTENDING THEREFROM AT SAID INLET END FOR ROTATABLY RECEIVING SAID CONNECTOR MEANS; AN EXTERNAL SLEEVE MEMBER POSITIONED ON THE OUTSIDE OF SAID WALL MEMBER AT SAID INLET END, SAID INLET END OF SAID CONDUIT BEING FIXED BETWEEN SAID INTERNAL AND EXTERNAL SLEEVE MEMBERS FOR ATTACHING SAID CONNECTOR TO SAID CONDUIT WALL MEMBER; SEALING MEANS FOR PREVENTING LEAKAGE FROM SAID FLUID CONDUIT WHEN SAID CONNECTOR IS ATTACHED TO SAID FLUID SUPPLY SYSTEM; VENT MEANS EXTENDING THROUGH SAID EXTERNAL SLEEVE, SAID WALL MEMBER, AND SAID INTERNAL SLEEVE TO VENT SAID CONDUIT TO THE ATMOSPHERE; A VALVE MEMBER WITHIN SAID CONDUIT INCLUDING AN ANNULAR INGRESS PORTION DISPOSED WITHIN SAID CONNECTOR MEANS AND A RESILIENT TUBULAR PORTION CONNECTED TO SAID ANNULAR INGRESS PORTION AND WITH SAID ANNULAR INGRESS PORTION DEFINING AN INGRESS OPENING AT ONE END THEREOF, SAID TUBULAR PORTION COMPRISING AN EXPANDABLE AND COLLAPSIBLE THIN WALL JUXTAPOSED TO SAID VENT MEANS AND DEFINING A RELATIVELY SMALLER EGRESS OPENING AT THE OTHER END OF SAID TUBULAR PORTION DISPOSED BETWEEN SAID VENT MEANS AND SAID CONDUIT OUTLET AND UNIFORMLY TAPERED BETWEEN SAID INGRESS AND EGRESS OPENINGS WHEREBY POSITIVE FLUID PRESSURE IN SAID INGRESS OPENING CAUSES EXPANSION OF SAID TUBULAR PORTION TO CLOSE SAID VENT MEANS AND NORMAL NEGATIVE PRESSURE IN SAID INGRESS OPENING CAUSES COLLAPSING OF SAID TUBULAR PORTION TO OPEN SAID VENT MEANS AND SEAL SAID EGRESS OPENING.