Valve coupler

Claim 1

A COUPLER FOR TUBING OF THE TYPE HAVING AN ENLARGED PORTION ADJACENT ONE END AND HAVING A CYLINDRICAL COLLAR RELEASABLY SECURED TO SAID ONE END WITH SAID ENLARGED PORTION HAVING A DIAMETER GREATER THAN SAID TUBING AND SAID COLLAR HAVING A DIAMETER GREATER THAN SAID ENLARGED PORTION, SAID COUPLER COMPRISING A GENERALLY CYLINDRICAL HOLLOW BODY ADAPTED TO ENGAGE OVER THE FREE END OF SAID COLLAR, A RADIALLY INWARDLY EXTENDING SHOULDER DISPOSED IN SAID HOLLOW BODY INTERMEDIATE THE OPPOSITE ENDS THEREOF, AN ANNULAR RESILIENT SEAL MOUNTED IN SAID BODY AND ABUTTING AN AXIALLY EXTENDING FACE OF SAID SHOULDER FOR SEALING ENGAGEMENT BETWEEN SAID SHOULDER AND THE FREE END OF SAID COLLAR, A GENERALLY U-SHAPED BUSHING ADAPTED TO BE MOVED RADIALLY INTO ENGAGEMENT ABOUT SAID TUBING ADJACENT SAID ENLARGED PORTION, A YOKE MEMBER DISPOSED CONCENTRICALLY ABOUT SAID BUSHING, MEANS PIVOTALLY CONNECTING SAID YOKE MEMBER TO SAID BUSHING NEAR THE UPPER END OF THE BUSHING, A PAIR OF DIAMETRICALLY DISPOSED LINKS PIVOTALLY SECURED AT THEIR UPPER ENDS TO SAID CYLINDRICAL BODY AND AT THEIR LOWER ENDS TO SAID YOKE MEMBER, SAID LATTER PIVOT AXIS BEING LOCATED ON SAID YOKE MEMBER BELOW THE PIVOT AXIS OF THE YOKE MEMBER TO THE BUSHING, SAID BUSHING BEING SLIDABLE LONGITUDINALLY OVER SAID ENLARGED PORTION INTO ENGAGEMENT WITH THE OTHER END OF SAID COLLAR, SAID BUSHING HAVING A SIDE OPENING GREATER THAN THE DIAMETER OF SAID TUBING AND SMALLER THAN THE DIAMETER OF SAID ENLARGED PORTION SO CONSTRUCTED AND ARRANGED THAT LATERAL DISPLACEMENT OF SAID BUSHING FROM SAID ENLARGED PORTION IS PREVENTED, AND HANDLE MEANS ON SAID YOKE FOR SWINGING SAID YOKE ON SAID LINKS AND ABOUT THE PIVOTAL CONNECTION OF SAID YOKE TO SAID BUSHING WHEREBY SAID BUSHING AND SAID BODY ARE MOVED INTO BINDING ENGAGEMENT WITH THE OPPOSITE ENDS OF SAID COLLAR.