Self adjusting actuator system

Details Self adjusting actuator system Self adjusting actuator system

1979-07-11

1982-02-02

Cohen, Irwin C.

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

Locking device

91437, 91441, 91450, 414730, 414739, B66C 316, F15B 13042

Patent

active

043136338

ABSTRACT:
A self adjusting actuator system (32/32') has an actuator housing (40), a telescoping piston (52) defining therewith head and rod end chambers (58,60), and a compression spring (66) disposed for biasing the piston (52) in a preselected direction against an external force. A control system supplies fluid selectively to either of the chambers (58,60) and includes control device (33/33') for selectively permitting egress of fluid from the rod end chamber (60) to permit the piston (52) to move in the preselected direction in response to a change in the external force. Such system is particularly useful in a log grapple (10).

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