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

Claim 8:
9. A piston check valve, comprising: a body; an upstream opening; a downstream opening; a piston having a proximal end portion, a distal end portion, and an axially-central pillar between the proximal end portion and the distal end portion, the piston being secured within the body between the upstream opening and the downstream opening and being movable between a closed position and an open position; a resilient member biasing the piston towards the closed position; a check valve connected through a portion of the piston; a retainer contacting the proximal end portion of the piston; and a removable valve seat having an opening sized to receive the distal end portion of the piston when the piston is in the closed position.