Check valve

Details Check valve Check valve

1995-01-12

1996-08-20

Rivell, John

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

13754319, 13754321, F16K 1726, F16K 1502

Patent

active

055469817

ABSTRACT:
A check valve for a metering device having a negligible pressure drop thereacross includes a valve seat defining an inlet flow region, an open support frame projecting outwardly from the valve seat to define an outlet flow region having a predetermined flow area greater than the flow area of the inlet flow region and a valve member slidably mounted to the support frame and biased thereagainst for reciprocal movement between a flow blocking position and a flow sustaining position.

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patent: 4648369 (1987-03-01), Wannenwetsch
patent: 5062451 (1991-11-01), Vadasz et al.
patent: 5146949 (1992-09-01), Retzloff et al.
patent: 5176172 (1993-01-01), Ackroyd

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