Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1992-01-03
1993-05-18
Schwadron, Martin P.
Fluid handling
Systems
Flow path with serial valves and/or closures
137614, 2511496, F16L 3728
Patent
active
052111970
ABSTRACT:
A quick disconnect coupling for a liquid line, the coupling having male and female coupling elements each of which is closed to flow in an uncoupled state and opened to flow when coupled. The male coupling element is made up of an outer annular member and an annular body which is positioned within the annular member and which is slidable with respect thereto, an annular retainer being positioned concentrically between the annular member and the annular body and being affixed to the annular member to be non-slidable with respect thereto. The annular body is resiliently biased against an internal shoulder of the annular member by a wave spring which is trapped between an external shoulder of the annular body and an inturned flange of the annular retainer, A valve member is positioned within the annular body and is slidable with respect thereto. The valve member has an imperforate outer end which closes the annular body to fluid flow in its most advanced position, to which it is biased in an uncoupled condition of the male coupling element by a coil spring. A condition of excessive pressure within the uncoupled male coupling element will cause the valve member and the annular body to move in unison with respect to the anhular member and the annular retainer, against the biasing effect of the wave spring, to thereby increase the internal volume of the coupling element ahd relieve a condition of excessive pressure therein.
REFERENCES:
patent: 3525361 (1970-08-01), Cerbin et al.
patent: 4429713 (1984-02-01), Walter
patent: 4924909 (1990-05-01), Wilcox
patent: 5016671 (1991-05-01), Barwise
Marrison William C.
Rogers Russell L.
Aeroquip Corporation
Lee Kevin L.
Schwadron Martin P.
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