Patent ID: 9518668
Filing Date: 2016-12-13
CPC Classification: F16K,Y10T

Claim Text:
1. A check valve, comprising: a body; two sidewalls extending from the body; a pin coupled between the two sidewalls; a flapper pivotably coupled to the pin to occupy respective open and closed positions in accordance with a pressure differential of a fluid flow across the check valve, the flapper including a flapper body formed as a plate and a backbone that is thicker than the flapper body and extends along an entire length of the flapper body; an arcuate outer protrusion that connects opposing ends of the backbone and extends from an upper surface of the flapper body; and a rib extending between and connecting the arcuate outer protrusion and the backbone, the rib being perpendicular to the backbone, wherein the rib portion includes an indentation that contacts a stop pin when the check valve is in the open position.