US 12,292,123 B2
Clapper with an upstream cam-arm and roller arrangement
Luis Fernando Prieto, Chino, CA (US); Alan Long Thien Du, Covina, CA (US); Pui Yuen Ng, Eastvale, CA (US); Arturo Gomez, Moreno Valley, CA (US); and Adrian Alexander Filip, Corona, CA (US)
Assigned to Acorn Engineering Company, Inc., City of Industry, CA (US)
Filed by Acorn Engineering Company, Inc., City of Industry, CA (US)
Filed on Sep. 18, 2023, as Appl. No. 18/369,722.
Claims priority of provisional application 63/407,490, filed on Sep. 16, 2022.
Prior Publication US 2024/0093795 A1, Mar. 21, 2024
Int. Cl. F16K 15/03 (2006.01)
CPC F16K 15/033 (2013.01) 20 Claims
OG exemplary drawing
 
1. A check valve comprising:
a check seat defining a flow path;
a clapper assembly hingedly connected to the check seat and configured to obstruct the flow path, the clapper assembly comprising:
a clapper; and
a seal retainer detachably mounted to the clapper;
a first extension extending from the clapper assembly in an upstream direction, the first extension comprising a roller;
a cam arm rotatable relative to the clapper assembly, the cam arm configured to engage with the roller; and
a torsion spring operatively connected to the cam arm so as to apply a biasing force to the cam arm in the upstream direction,
wherein the biasing force is imparted to the clapper assembly via the cam arm and roller, so that the clapper assembly is urged in a direction to obstruct the flow path.