Charge pressure priority valve

Details Charge pressure priority valve Charge pressure priority valve

1991-03-28

1992-11-24

Cohan, Alan

Power plants

Pressure fluid source and motor

Input pump and rotary output motor system having...

137101, 137118, F15B 1120

Patent

active

051652331

ABSTRACT:
A charge pressure priority valve for supplying a flow of sufficient pressure to energize an auxiliary implement while supplying a nearly constant pressure flow to a hydrostatic fluid circuit includes a valve body having an interior bore with a pump inlet passage for communicating a flow from a hydraulic pump thereto. A main flow outlet passage extends from the interior bore for supplying fluid to the hydraulic fluid circuit and has a main flow feedback passage interconnecting the main flow outlet passage and the interior bore. An auxiliary flow outlet passage extends from the interior bore for supplying a flow of sufficient pressure to energize an auxiliary implement. A valve spool is disposed within the interior bore and defines a central chamber intermediate a pair of spaced apart end chambers in the bore, with one of the pair of end chambers being isolated from the other of the pair of end chambers.

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patent: 5069037 (1991-12-01), Sakigawa

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