Check valve

Fluid handling – Line condition change responsive valves – Direct response valves

Reexamination Certificate

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Details

C137S847000, C347S085000

Reexamination Certificate

active

10976663

ABSTRACT:
A check valve includes two opposing sheets surfaces that are coupled together to form a flow channel there between. The flow channel has a first end, a second end and at least one direction-changing portion in between the first and second ends. A first opening is provided at the first end of the flow channel and a second opening is provided at the second end of the flow channel.

REFERENCES:
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patent: 6172694 (2001-01-01), Droege et al.
patent: 6192917 (2001-02-01), Ramos Loza
patent: 6247473 (2001-06-01), Yavitz
patent: 6357915 (2002-03-01), Anderson
patent: 6729473 (2004-05-01), Anderson
patent: 2 756 899 (1998-06-01), None

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