# US 12,007,035 B2 · Variable pressure control valve > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,007,035 B2 - Document ID: US12007035B2 - Status: Granted - Kind: B2 - Application number: 17/977,851 - Filed: 2022-10-31 - Published: 2023-05-11 - Granted: 2024-06-11 - Earliest claimed: 2021-11-05 - Assignees: Eaton Intelligent Power Limited - Applicants: Eaton Intelligent Power Limited - Inventors: Ashok Kalappa Vishwakarma; Swastik Balshiram Davkhar; Pushkar Prasad Gijare; Michael Leo Madlangbayan; Andres Olmedo - Web page: https://patentgrep.com/patent/US12007035B2 ## CPC - F16K 17/30: spring-loaded - B64F 1/28: Liquid-handling installations specially adapted for fuelling stationary aircraft - F16K 1/126: {actuated by fluid} - F16K 3/265: {with a sleeve sliding in the direction of the flow line} - F16K 27/041: {cylindrical slide valves} - F16K 37/0058: {Optical means, e.g. light transmission, observation ports (F16K37/0075 takes precedence)} - F16K 2200/304: Adjustable spring pre-loading - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - B64F: GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR ## Abstract The present disclosure relates to a valve assembly for controlling flow. The valve body has an inlet end and an outlet end. A piston is positioned within the valve body and is movable between an open position to open the valve body and a closed position to close the valve body. A spring is mounted between the piston and a spring adjustment member. A portion of the spring adjustment member is accessible through the inlet end of the valve body so as to be engageable by a tool to facilitate rotation of the spring adjustment member to vary compression of the spring to set a spring pressure rating. ## Claims ### Claim 1 A valve assembly for controlling flow of liquid from a pressured supply into a tank, the valve assembly comprising: a valve body having an inlet end and an opposite outlet end; a piston operative to close the valve assembly in response to a rise in fluid back pressure when a predetermined liquid level is reached in the tank; and a spring mounted between the piston and a spring adjustment member, a portion of the spring adjustment member being accessible through the inlet end of the valve body so as to be engageable by a tool to facilitate axial movement of the spring adjustment member to vary a compression of the spring to achieve a spring pressure rating; a spring chamber in which the spring is positioned; and a cap member that blocks one end of the spring chamber, wherein the spring adjustment member includes a stem that projects through the cap member and a head within the cap member that is axially adjustable within the cap member, and wherein the stem defines a torque interface end accessible through the inlet end of the valve body for changing its axial position. ### Claim 2 (depends on 1) The valve assembly of claim 1, wherein the tool is inserted into the torque interface end of the spring adjustment member to turn the spring adjustment member to increase or decrease space between the piston and the spring adjustment member between which the spring is compressed; and wherein the spring adjustment member includes a pressure rating indicator visible through the inlet end of the valve body to set the spring pressure rating. ### Claim 3 (depends on 1) The valve assembly of claim 1, wherein the valve body includes a first housing piece and a second housing piece. ### Claim 4 (depends on 1) The valve assembly of claim 1, wherein the valve body is cast from a single piece of metal. ### Claim 5 (depends on 1) The valve assembly of claim 1, wherein the spring extends through the spring chamber and has spring end portions housed within the cap member and the piston. ### Claim 6 (depends on 1) The valve assembly of claim 1, wherein the cap member has a threaded connection with the valve body. ### Claim 7 (depends on 1) The valve assembly of claim 1, wherein the head of the spring adjustment member has a threaded connection with the cap member, and wherein a seal is provided between the stem and the cap member. ### Claim 8 A valve assembly for controlling flow from a pressurized source to a tank, the valve assembly comprising: a valve body having an inlet end and an outlet end, the valve body defining fluid passages for receiving fluid flow between the inlet and outlet ends; a piston mounted within the valve body to control the fluid flow, the piston being movable between an open position and a closed position; a cap member that mounts adjacent the inlet end of the valve body; a compensator device housed within the cap member, the compensator device being accessible through the inlet end of the valve body; a spring mounted between the piston and the compensator device, wherein the spring biases the piston toward the open position, wherein the spring is compressed when the piston moves to the closed position; wherein the compensator device is configured to axially rotate relative to the cap member to vary a compression of the spring to achieve a desired spring pressure rating; and wherein the cap member blocks one end of a spring chamber, wherein the compensator device includes a stem that projects through the cap member and a head that threads within the cap member, wherein the spring extends through the spring chamber and has spring end portions housed within the cap member and the piston, and wherein the stem includes a torque interface for allowing the compensator device to be turned relative to the cap member by a tool inserted through the inlet end of the valve body without requiring disassembly of the valve assembly to adjust the compression of the spring. ### Claim 9 (depends on 8) The valve assembly of claim 8, wherein the cap member has a threaded connection with the valve body. ### Claim 10 (depends on 8) The valve assembly of claim 8, wherein the compensator device includes a pressure rating indicator visible through the inlet end of the valve body to set the desired spring pressure rating. ### Claim 11 (depends on 8) The valve assembly of claim 8, wherein the valve body includes a first housing piece and a second housing piece. ### Claim 12 (depends on 8) The valve assembly of claim 8, wherein the valve body is cast from a single piece of metal.