Apparatus for controlling an adjustable arm

Details Apparatus for controlling an adjustable arm Apparatus for controlling an adjustable arm

1985-03-01

1986-12-30

Hershkovitz, Abraham

Motors: expansible chamber type

With motive fluid valve

Pilot valve

91388, F15B 1108

Patent

active

046320164

ABSTRACT:
A device for controlling an adjustable arm 1 has an operating circuit 10 including a movable valve 3 with two control mechanisms 11, 12 bidirectionally actuated by pressure. A control circuit to activate the movable valve is connected to a pressure source 19, to the two control mechanism 11, 12, and to an adjustable throttle 22 attached to one of the two control mechanism 12. The control circuit also includes an adjustable throttle 24, series connected adjustable throttles 27, 28 attached to the other control mechanism 11 and a fifth adjustable throttle 57. The fifth throttle is used to create an additional actual value input. An adjustable control valve 53 employs the desired and actual value inputs supplied by the adjustable throttles in various ways by interconnecting the throttles with the control devices and a pressure ratio valve 45 so that the system responds to applied force, position or both.

REFERENCES:
patent: 4293040 (1981-10-01), O'Connor
patent: 4350209 (1982-09-01), O'Connor
patent: 4510847 (1985-04-01), Mucheyer
patent: 4574687 (1986-03-01), Kauss

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