Leakproof refrigerant connector

Claim 1

A coupling for safely opening a normally closed Schrader-type valve which is connected to the refrigerant fluid of a compressor-type air conditioning system, the valve having a valve stem, the coupling comprising: a first connector body a first end of which is attachable to the exterior of said valve, a second end including an opening therein; a conduit retained at one end by said first connector body and sealed to said valve, and extending outwardly through said second end opening at an angle off-set from the axis of said opening, the other end of said conduit including an enlarged portion, said enlarged portion including a cylinder space which is in communication with said conduit; a piston, having a bore axially therethrough in communication with said cylinder space and said conduit, said piston sealably reciprocable within said cylinder; a second connector body interconnected with said enlarged portion of said conduit and retaining said piston in said cylinder; an elongated resilient conduit like member extending from the end of said piston in said cylinder through said conduit into contiguous relationship to the valve stem; and means to advance said piston against said resilient member, thereby forcing said member against said stem to open said valve.