Patent ID: 11859722
Assignee: SCV VALVE, LLC
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 16:
17. A piston check valve, comprising:
a body;
an upstream end;
a downstream end disposed opposite the upstream end in a lateral direction;
a piston between the upstream end and the downstream end in the lateral direction, the piston having a central pillar extending from a distal end portion of the piston;
a retainer that surrounds the piston;
a check valve in the piston and offset from the central pillar; and
a valve seat having a ring-shaped proximal end portion that contacts the retainer, the proximal end portion of the valve seat having a sealing surface configured to contact the distal end portion of the piston when the piston check valve is closed so as to block a flow of fluid from the upstream end to the downstream end.