Back to results
US 11,859,722 B2Granted
Systems and methods for piston check valves
AssigneeSCV Valve, LLC
InventorSidney McCarra
Life of this patent
Estimating the term…
Abstract
A piston check valve system includes a body including an upstream end and a downstream end, a bonnet secured to a proximal opening of the body, and a piston secured within the body, the piston being moveable between a closed position in which the piston rests upon a valve seat and an open position in which the piston is spaced away from the valve seat. The piston check valve system also includes a retainer configured to guide and retain the piston and to secure the valve seat within the body.
Claims20
A piston check valve, comprising:
- a body;
- an upstream flange;
- a downstream flange, the downstream flange being disposed opposite the upstream flange;
- a bonnet secured to the body;
- a piston including a proximal end that faces the bonnet and a distal end that faces a portion of the body, the piston having a central pillar forming a narrowed portion connected to and extending axially between the proximal end and the distal end of the piston;
- a retainer that surrounds the proximal end, the central pillar, and the distal end of the piston;
- and a valve secured to the piston.
4 more elements
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.
5 more elements
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.
5 more elements
Dependencies are inferred from the claim text.