Check valve

Details Check valve Check valve

2007-07-31

2010-12-14

Rivell, John (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C604S027000

Reexamination Certificate

active

07849875

ABSTRACT:
A check valve having a piston-like ball or stopper a pre-determined distance from the valve seat so that the ball or stopper seats against the valve seat only under backflow pressure.

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John M. Bourne, Spring-Less Check Valve for a Handpiece, U.S. Appl. No. 12/237,468, filed Sep. 25, 2008 (18 pages).

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