Valve couplers designed to allow their connection despite the presence of considerable residual pressure in user lines
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United States of America Patent
Stats
-
Oct 27, 1987
Grant Date -
N/A
app pub date -
May 21, 1986
filing date -
May 21, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A coupling device for receiving and retaining a coupling piece allowing coupling with pressure in the piece coupled while also providing flow checking to prevent unintended closing of the coupled valves. The device includes first and second joined tubular pieces axially movable with respect to each other between a receiving position for receiving a coupling piece and a retaining position for retaining a coupling piece. A valve is movable in the coupling piece between a closed position, an open position and a position past open allowing coupling to a coupling piece with fluid pressure therein. A stop is responsive to the receiving and retaining positions of the tubular pieces so that only when the pieces are in a receiving position can the valve move from an open position to a position past open. The stop is preferably a shoulder on a stem of the valve which engages the leading edge of a collet actuated by a sleeve. The sleeve is disposed between the valve stem and the second tubular piece.
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