Rotary actuator

192 clutches and power-stop control – Clutches – Plural clutch-assemblage

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Details

74625, 192 4891, 192114R, 25112903, F16D 4702

Patent

active

045629080

ABSTRACT:
A rotary actuator having an output driver rod mounted within an output sleeve that is rotated by a drive motor. A driving mechanism for coupling the drive motor to the output sleeve includes a worm wheel that is mounted on the output sleeve so as to be freely rotatable relative to the output sleeve and a driving portion for transmitting power from the worm wheel to the output sleeve. A clutch also is mounted on the output sleeve for rotation with and for axial movement along the output sleeve. When in its first position, the clutch couples the drive portion of the drive mechanism to the output sleeve for transmitting rotational force. The clutch is normally biased into its first position for engagement with the drive portion of the drive mechanism and thus for coupling it to the output sleeve for transmitting rotational force. A declutch mechanism causes the clutch to be moved into a second position out of engagement with the drive portion. The declutch mechanism is capable of switching from a powder driver operation to a manual hand wheel mode of operation without going through a neutral position. A self-locking means is provided to prevent rotation of the hand wheel under torsional back force when the clutch is in the second position.

REFERENCES:
patent: 1966209 (1934-07-01), Miller
patent: 2028699 (1936-01-01), Beckwith
patent: 3198033 (1965-08-01), Fry
patent: 3414097 (1968-12-01), Denkowski
patent: 4022309 (1977-05-01), Denkowski et al.
patent: 4130030 (1978-12-01), Stratienko
patent: 4393965 (1983-07-01), Zouzoulas

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