Hydraulic rotary actuator

Details Hydraulic rotary actuator Hydraulic rotary actuator

1983-07-21

1985-03-26

Freeh, William L.

Motors: expansible chamber type

Independently operated timer, delay, pattern or cyclic control

91491, 192 3N, 192 30W, F15B 2102, F01B 106, F01B 1306

Patent

active

045065900

ABSTRACT:
A hydraulic rotary actuator which comprises a harmonic drive and a hydraulic motor completely enclosed in the casing of the harmonic drive so that the rotation of the motor is taken out through an output shaft fixed to the drive at a reduced speed. In the casing of the harmonic drive there are provided an electromagnetic brake which acts on the motor, means for increasing the performance of the magnetic brake, means for magnetically shielding the supporting shaft of the hydraulic motor, and means for detecting the angular position of the motor and that of the output shaft relative to the supporting shaft of the motor.

REFERENCES:
patent: 3088333 (1963-05-01), Musser
patent: 3364361 (1968-01-01), Burger
patent: 3403365 (1968-09-01), Richards
patent: 3589243 (1971-06-01), Bowman
patent: 3589482 (1971-06-01), Weston, Jr.
patent: 3737014 (1973-06-01), Dalrymple
patent: 3762488 (1973-10-01), Dammon
patent: 3943826 (1976-03-01), Kita
patent: 4068560 (1978-01-01), Orloff
patent: 4340133 (1982-07-01), Blersch

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