Controller for fluid pressure operated devices providing high pr

Details Controller for fluid pressure operated devices providing high pr Controller for fluid pressure operated devices providing high pr

1976-04-16

1977-09-27

Peters, Jr., Joseph F.

Fluid handling

Systems

Supply and exhaust

60384, 13762524, 418 61B, B62D 508

Patent

active

040504743

ABSTRACT:
A controller for fluid pressure operated devices such as power steering systems is provided. The controller is of the type having an inlet for receiving a system fluid flow, an outlet, a pair of control fluid ports for connection to a primary fluid pressure operated device and an auxiliary fluid port for connection to an auxiliary fluid pressure operated device or system. The controller includes a valve means having a primary valve member and a follow-up valve member, the valve members defining a neutral position relative to each other. A fluid meter includes a movable member coupled to the follow-up valve member. The primary and follow-up valve members cooperate with the housing to define a first flow path including the inlet, one of the control fluid ports, the fluid meter, the other of the control fluid ports, and the outlet when the valve members are relatively displaced from the neutral position. The primary and follow-up valve members cooperate with the housing to further define a second flow path communicating between the inlet and the auxiliary fluid port when the valve members are in the neutral position. Both the first and second flow paths are capable of receiving substantially all of the system fluid flow, but with the primary fluid pressure device having priority to receive the full system fluid flow when it is needed, such as to control a power steering cylinder.

REFERENCES:
patent: 3834278 (1974-09-01), Goff
patent: 3960234 (1976-06-01), Morgan

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