Telescoping spring retention assembly for a check valve
AssigneeWatts Regulator Co.
InventorsPeter P. BOUCHARD, Tyler CHASE, David MICHAUD
Life of this patent
Estimating the term…
Abstract
A valve assembly with a spring retention assembly including an elongated cylinder portion having an open threaded end and a closed end and an elongated piston portion having a free end and a threaded tab end configured to thread through the open threaded end and, thereby, be slideably captured in the cylinder portion. A spring couples to the body portion and the piston portion to provide a force to urge the body portion and the piston away from one another, wherein the closed end and the free end are similarly shaped so that the spring retention assembly can be reversibly mounted to a valve member that can also be reversibly mounted.
Claims20
A backflow prevention valve assembly comprising:
- a housing having a valve seat surrounding a valve opening;
- a valve element rotatably connected to the housing and configured to selectively contact the valve seat to close the valve opening for preventing backflow;
- and
- a bias assembly, extending between the housing and the valve element, configured to push the valve element into contact with the valve seat at a predetermined differential pressure between an upstream pressure and a downstream pressure, the bias assembly including:
- an elongated cylinder portion having an open end and defining at least one slot extending along an axis;
- an elongated piston portion extending along the axis, having a captured end with at least one button configured to be slideably captured in the at least one slot of the elongated cylinder portion;
- and
- a spring coupled to the cylinder portion and the elongated piston portion to provide a force to urge the elongated cylinder portion and the elongated piston portion away from one another to set the predetermined differential pressure.
A spring assembly for selectively biasing a valve element closed in a check valve assembly comprising:
- an elongated cylinder portion defining at least one axial slot extending along an axis;
- an elongated piston portion extending along the axis and having at least one button configured to be slideably captured in the axial slot of the elongated cylinder portion;
- and
- a spring coupled to the elongated cylinder portion and the elongated piston portion to provide a force to urge the elongated cylinder portion and the elongated piston portion away from one another, wherein the force sets a predetermined differential pressure between an upstream pressure and a downstream pressure that closes the check valve.
A spring assembly for selectively biasing a valve element closed against a valve opening formed in a housing of a check valve assembly, the spring assembly comprising:
- a cylinder portion extending along an axis;
- a piston portion extending along the axis;
- first means configured to slidably couple the cylinder and piston portions together for linear movement along the axis;
- second means configured to mount the cylinder and piston portions between the valve element and the check valve;
- and
- a spring coupled to the cylinder portion and the piston portion to provide a force to urge the cylinder portion and the piston portion away from one another, wherein the force sets a predetermined differential pressure between an upstream pressure and a downstream pressure that determines when the check valve closes.
Dependencies are inferred from the claim text.