US 12,442,396 B2
Valve with an adjustable flow sharing pressure compensator
Gregory Thomas Coolidge, Elyria, OH (US)
Assigned to Parker-Hannifin Corporation, Cleveland, OH (US)
Appl. No. 17/768,639
Filed by Parker-Hannifin Corporation, Cleveland, OH (US)
PCT Filed Nov. 11, 2020, PCT No. PCT/US2020/059920
§ 371(c)(1), (2) Date Apr. 13, 2022,
PCT Pub. No. WO2021/154369, PCT Pub. Date Aug. 5, 2021.
Claims priority of provisional application 62/966,077, filed on Jan. 27, 2020.
Prior Publication US 2024/0102495 A1, Mar. 28, 2024
Int. Cl. F15B 13/04 (2006.01)
CPC F15B 13/0418 (2013.01) [F15B 13/0417 (2013.01); F15B 2211/30535 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A pressure compensator valve comprising:
a compensator spool;
a first piston, and coupled to a distal end of, and axially-movable with, the compensator spool;
a second piston disposed in a cavity formed at a proximal end of the compensator spool, wherein the compensator spool is axially movable relative to the second piston;
a regulated flow passage configured to have fluid being discharged from the pressure compensator valve;
a metered flow passage configured to be fluidly coupled to a workport of an actuator;
a compensator inlet cavity configured to receive inlet fluid from a source of fluid;
a compensator spring applying a biasing force on the compensator spool in an opening direction that allows fluid communication from the compensator inlet cavity to the regulated flow passage, and wherein the compensator spring is disposed in a chamber that is fluidly coupled to the metered flow passage, which is fluidly coupled to the workport of the actuator;
a compensator plug fixedly disposed adjacent the proximal end of the compensator spool, wherein a proximal end of the second piston contacts, and is secured against, the compensator plug, and wherein a proximal end of the compensator spring rests against the compensator plug, whereas a distal end of the compensator spring contacts the compensator spool; and
a load-sense cavity configured to receive a global load-sense signal indicative of a highest pressure level among multiple workports, which is different from a pressure level of the chamber of the compensator spring, wherein the global load-sense signal applies a fluid force on the first piston and the compensator spool coupled thereto in a proximal direction.