Steering valve mechanism having closed neutral position

Details Steering valve mechanism having closed neutral position Steering valve mechanism having closed neutral position

1979-08-13

1982-04-20

Hershkovitz, Abraham

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91465, F15B 910

Patent

active

043252869

ABSTRACT:
A pair of inlet valves held closed in the neutral position of a valve actuator are opened under control of a valve operating force transmitted through a regulating spring in response to displacement of the valve actuator from the neutral position. The valve operating force applied is opposed by the pressure in a servomotor chamber to regulate the chamber pressure within a predetermined range above a limiting value of the valve operating force applied. Outlet valves are opened under a servomotor operating pressure higher than the pressure regulated by the inlet valves to control exhaust of fluid from the operating chambers.

REFERENCES:
patent: 3044569 (1962-07-01), Farmery
patent: 3408900 (1968-11-01), Tamaki Tomita
patent: 3855904 (1974-12-01), Jablonsky
patent: 3927602 (1975-12-01), Strauff
patent: 3952631 (1976-04-01), Strauff
patent: 3967537 (1976-07-01), Strauff
patent: 3978770 (1976-09-01), Strauff
patent: 4022110 (1977-05-01), Strauff
patent: 4123964 (1978-11-01), Strauff
patent: 4222309 (1980-09-01), Ongaro

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