Linear actuator with controllable output force

Details Linear actuator with controllable output force Linear actuator with controllable output force

1991-10-28

1993-01-05

Lorence, Richard

Machine element or mechanism

Mechanical movements

Rotary to or from reciprocating or oscillating

74107, 251263, F16H 2508

Patent

active

051760371

ABSTRACT:
An actuator suitable for use with a valve has a design allowing for easy control or adjustment of the force applied to the valve. The actuator motor has a cam which operates a follower surface of a spring-loaded arm mounted for rotation on a carriage. The carriage is mounted for linear motion and connected to the control element of the valve. The actuation force can be controlled or adjusted by changing the relative positions of the arm's center of rotation, the point on the arm at which the spring applies force, and the position of the cam. In a preferred embodiment, the position of the arm's center of rotation is changed by moving a pin from one set of holes in the carriage and the arm to a second set of holes in the carriage and the arm.

REFERENCES:
patent: 343857 (1886-06-01), Richards
patent: 1784902 (1930-12-01), Maurais
patent: 1989942 (1935-02-01), Parks et al.
patent: 2329820 (1943-09-01), Breese
patent: 2460695 (1949-02-01), Hennessy
patent: 2970485 (1961-02-01), Frank
patent: 3082633 (1963-03-01), Rabinow
patent: 3142186 (1964-07-01), Melton et al.
patent: 4087970 (1978-05-01), Slazas et al.

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