Linear actuator improvement to prevent "back driving"

Details Linear actuator improvement to prevent "back driving" Linear actuator improvement to prevent "back driving"

1990-04-23

1991-11-12

Moore, Richard E.

Machine element or mechanism

Gearing

With brake means for gearing

5 66, F16H 5710

Patent

active

050638084

ABSTRACT:
An improvement (17) for a linear actuator mechanism (1) includes a brake mechanism (19) acting on an intermediate gear (39) of a gear mechanism (21) of the actuator. The brake mechanism includes a spring washer (61) installed on a gear shaft (53) and thrust washers (59) mounted on the gear shaft on each side of the gear. A constant force is exerted on the gear by the brake mechanism to eliminate "back drive" forces operating on a lead screw (5) of the actuator when its motor (7) is de-energized.

REFERENCES:
patent: 3485109 (1969-12-01), Dunlap
patent: 3621731 (1971-11-01), Houss
patent: 4395786 (1983-08-01), Casey et al.
patent: 4635491 (1987-01-01), Yamons et al.

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