Patent ID: 9027589
Filing Date: 2015-05-12
Classification: F15B,G05D,Y10T

Abstract:
1. An integral pressure compensator valve and pressure limiter valve comprising: a fluid flow path; a pressure compensator valve and a pressure limiter valve disposed in said fluid flow path and dividing said fluid flow path into an upstream side and a downstream side; a pressure compensator spool carrying a pressure compensator valve surface, said pressure compensator valve surface being movable with said pressure compensator spool and defining a variable area fluid orifice in said fluid flow path; a pressure limiter spool carrying a pressure limiter valve surface, a pressure limiter passage, said pressure limiter valve surface being movable longitudinally with said pressure limiter spool to open and close said pressure limiter passage, and a housing for the fluid flow path, the pressure compensator valve and the pressure limiter valve, the housing having a first spool bore and the pressure compensator spool and the pressure limiter spool are disposed in the first spool bore, wherein the pressure compensator spool includes a second spool bore, and the pressure limiter spool is slidably disposed in the second spool bore and is carried by the pressure compensator spool.