Machine element or mechanism – Gearing – Directly cooperating gears
Patent
1984-10-17
1987-05-26
Herrmann, Allan D.
Machine element or mechanism
Gearing
Directly cooperating gears
92 31, 92 33, 74 8915, 744248R, F16H 118, F16H 120, F01B 300
Patent
active
046675280
ABSTRACT:
A fluid powered, rotary actuator having a body, an annular member supported for rotation relative to the body, a fluid powered piston reciprocally mounted within the body, corresponding ball races on the body and the piston with balls disposed therein for transmitting torque therebetween, and corresponding ball races on the annular member and the piston with balls disposed therein for transmitting torque therebetween. The body has opposing, generally axially inward projecting support arms, between which the annular member is positioned with ball bearings disposed between the mating annular end walls of the support arms and the annular member. In one embodiment of the invention, the annular member has an attachment rim extending radially outward beyond the body, and adapted for attachment of an external device. The support arms are radially positioned to form a generally cylindrical exterior sidewall for the body, and an interior sidewall is positioned radially inward therefrom, between which the cylindrical piston is concentrically disposed. In another embodiment, the body has a generally cylindrical exterior wall with the support arms positioned radially inward therefrom to define a central recess in the body for receiving an external device. The annular member has a circumferential inner wall splined for driving engagement with the external device. In another disclosed embodiment, the ball grooves are replaced with inner-meshing splines.
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Belisario Martin
Herrmann Allan D.
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