Actuator locking device

Details Actuator locking device Actuator locking device

1980-08-05

1983-07-12

Hershkovitz, Abraham

Brakes

Rod

92 21MR, 92 23, F01B 2526

Patent

active

043925561

ABSTRACT:
A fluid pressure actuator which locks in the extended position. The lock is a roller operated, dual segment pawl mechanism that unlocks in response to a pressure difference between extend and retract pressures. The two lock segments, chamfered for engagement with the cylinder end, are in diametrically opposed slots in the actuator piston head. A cylindrical section projects from the segment portion. An end view of the lock is mushroom shaped. Two rollers, held in alignment normal to the actuator centerline by a cage integral with an unlock rod, operate in conjunction with the lock cam surfaces in such a manner as to carry the radial loading imposed when in the lock mode.
The rolling action of the rollers, combined with the radial application of locking force provides low friction operation of the lock.

REFERENCES:
patent: 2295961 (1942-09-01), Meyer
patent: 3177780 (1965-04-01), Andersen
patent: 3186308 (1965-06-01), Butterworth
patent: 4295413 (1981-10-01), Kamimura

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