Hydraulic rotary actuator

Details Hydraulic rotary actuator Hydraulic rotary actuator

1994-09-21

1995-08-08

Denion, Thomas E.

Expansible chamber devices

Rotating cylinder

92120, 92121, 92125, 414694, F01B 1300

Patent

active

054389127

ABSTRACT:
An hydraulically powered rotary actuator for rotating a first portion of a work machine relative to a second portion of the work machine has inner and outer rings enclosed by first and second cover plates. The inner and outer rings are spaced apart to define an hydraulic power chamber to which pressurized fluid is supplied to rotate one of the inner or outer rings. The first portion of the work machine is connected to the rotatable ring and rotates with it. A large diameter bearing assembly rotatably supports the rotatable ring and the first portion of the work machine. Most prior work machines with rotatable car or upper structure require large expensive components including gear reduction assemblies, an hydraulic motor, and large diameter swing gear. The subject actuator simplifies the construction by eliminating many of the prior components.

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patent: 3155013 (1964-03-01), Rumsey
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patent: 4524875 (1985-06-01), Jamieson
patent: 4746264 (1988-05-01), Kishi et al.

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