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US 10,677,389 B2Granted
Check valve
AssigneeCurtis Alan Roys
InventorsRodney Herman, Raymond J Hengel, Curtis Roys
Life of this patent
Estimating the term…
Abstract
A check valve supplies fluid to a system and includes a fluid barrier protects the sealing elements and surfaces of the check valve preventing degradation from any backflow of gas and debris from the system to which fluid is supplied.
Claims23
A valve for supplying fluid from a fluid source to a system, comprising:
- a housing having an axial conduit extending from an inlet at one end for entry of fluid into the housing to an outlet at an opposite end for exit of fluid from the housing;
- a check valve body disposed within the axial conduit of the valve housing;
- and
- a fluid flow path through which fluid flows from the inlet through the check valve body to the outlet, wherein fluid is retained within a portion of the fluid flow path preventing gas and debris from the outlet from entering the check valve body, wherein the fluid flow path includes a first spring biasing a first ball against a first sealing surface and a second spring biasing a second ball against a second sealing surface, the valve configured such that the first ball and second ball are displaced from the first and second sealing surfaces, respectively, by the pressure of fluid at the inlet.
1 more element
A method of manufacturing a valve structure, comprising:
- providing a housing having a central axis and an axial conduit extending along the central axis from a fluid inlet at a first end to a fluid outlet at a second end;
- providing a check valve body having a first valve body section and a second valve body section, the check valve body section having an inlet to accept fluid into the check valve body and having an outlet for fluid to exit the check valve body;
- and positioning the check valve body within the axial conduit of the housing to form a fluid flow path that extends from the inlet through the check valve body to the outlet, wherein a portion of the fluid flow path is formed to retain fluid to prevent gas and debris from entering the check valve body from the outlet, wherein the check valve body includes a first check valve and a second check valve, both in the fluid flow path, wherein a spring biases a first moveable sealing surface of the first check vlave and a second moveable sealing surface of the second check valve in opposite directions.
A valve for supplying fluid from a fluid source to a system, comprising:
- housing having an axial conduit extending from an inlet at one end for entry of fluid into the housing to an outlet at an opposite end for exit of fluid from the housing, the housing having a central axis;
- a check valve disposed within the housing, the check valve configured to be opened by the pressure of the fluid at the inlet, the check valve including;
- a first fixed sealing surface and a first movable sealing surface, the first moveable sealing surface being biased against the first fixed sealing surface by a first spring;
- a second fixed sealing surface and a second movable sealing surface, the second moveable sealing surface being biased against the second fixed sealing surface by a second spring;
- a fluid flow path from the second sealing surface to the outlet, wherein when the check valve is closed, fluid is retained within a portion of the fluid flow path preventing gas and debris from the outlet from entering the check valve body and wherein the second spring biases the first moveable surface and the second moveable surface in opposite directions.
2 more elements
Dependencies are inferred from the claim text.