Patent ID: 9334972
Filing Date: 2016-05-10
CPC Classification: F16K,Y10T

Claim Text:
1. A check valve, comprising: a valve body including an inlet end, an outlet end, and an inner surface that defines a flow passage between the inlet end and the outlet end, the inner surface further defining a valve seat adjacent the inlet end; a pair of stoppers integrally formed on the valve body inner surface, each stopper having a first end and a second end, each first end disposed proximate the inlet end and including a hinge pin opening formed therein, each second end disposed downstream of the first end; a hinge pin disposed within each hinge pin opening and extending across the flow passage; and one or more flappers disposed within the flow passage and rotationally mounted on the hinge pin, each of the one or more flappers rotatable between a closed position, in which the flapper engages the valve seat, and a full-open position, in which the flapper engages the pair of stoppers, wherein each stopper is dimensioned such that: