Refrigerant service system with self-sealing coupling

Details Refrigerant service system with self-sealing coupling Refrigerant service system with self-sealing coupling

1992-04-02

1993-09-28

Schwadron, Martin P.

Valves and valve actuation

With correlated flow path

Valve operated by joining flow path sections

13761402, F16L 3728

Patent

active

052481255

ABSTRACT:
A self-sealing coupling for connection to a fluid fitting having an open end of predetermined configuration includes an adapter having an axial passage and an open end contour to be received over the open end of the fitting. A poppet is disposed in the passage and extends to the open end of the adapter for engaging the fitting as the adapter is received over the fitting. A spring is disposed in the passage for urging the poppet into sealing engagement with the adapter, and a coupler nut is rotatably mounted on the adapter for releasably threadably fastening the adapter and coupling to the external threads of the fitting. The adapter passage includes a conical seat opposed to the poppet, and the poppet includes a conical shoulder opposed to the seat and of greater diameter than minimum diameter of the seat. This conical seat/shoulder construction not only enhances sealing between the poppet and adapter, but also makes the poppet self-centering within the adapter passage. An O-ring is carried within a radially oriented channel on the poppet for engaging the conical seat radially outwardly of the poppet shoulder, and thereby enhancing sealing between the poppet and adapter.

REFERENCES:
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patent: 5056560 (1991-10-01), DeMartelaere
patent: 5080132 (1992-01-01), Manz et al.

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