Auxiliary power steering system with relief valve control

Details Auxiliary power steering system with relief valve control Auxiliary power steering system with relief valve control

1979-05-22

1981-04-14

McCarthy, Edward J.

Motors: expansible chamber type

Working member position responsive motive fluid control

Venting expanding chamber

74499, F15B 1522, B62D 120

Patent

active

042612489

ABSTRACT:
The maximum operating pressure for the fluid servomotor of a fluid power operated steering system is varied as a function of steering displacement by varying the spring prestress bias on a relief valve controlling fluid discharge from the operating chamber of the fluid servomotor. The valve spring prestress is controlled by a spring engaged plunger that is displaced relative to the servomotor piston during steering displacement.

REFERENCES:
patent: 3092083 (1963-06-01), Sheppard
patent: 3252380 (1966-05-01), Jablonsky
patent: 3315570 (1967-04-01), Brewer
patent: 3905277 (1975-09-01), Rosell
patent: 4028996 (1977-06-01), Jablonsky
patent: 4170925 (1979-10-01), Katz

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