Low friction rotary hydraulic drive

Details Low friction rotary hydraulic drive Low friction rotary hydraulic drive

1991-09-13

1992-04-07

Carone, Michael J.

Expansible chamber devices

Piston

With separable means for pivotally mounting connecting rod...

92153, 92158, F16J 114

Patent

active

H00010375

ABSTRACT:
The device of the invention comprises a ball and socket and shoe assembly ich is pressure balanced with hydraulic fluid. This combination provides for low friction and relatively large travels when used as a linear to rotary motion actuator. In accordance with the contributions of the structural elements of the device, hydraulic pressure is applied to the rear of a piston by modulating the fluid pressure through a servo valve. Four pistons are typically used with two pistons driving the support spider clockwise and the other two driving the support spider counter clockwise. The control pressure produces a force through both the piston and pressure balanced shoes. The force is transmitted to the spider which is pivoted about flexures to produce a torque which results in a rotary motion of the spider (support).

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