Actuator driven by pressure change of fluid

Rotary expansible chamber devices – Non-metallic working member – cylinder or partition – Resilient

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F01C 500

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active

058791477

ABSTRACT:
The actuator of the present invention is driven by pressure changes of the fluid. A first structural body as an elastic body includes a plurality of pressure chambers along an axis direction. The first structural body passes through a second structural body, an annulus ring, with a predetermined gap between an outer surface of the first structural body and an inner surface of the second structural body. A supply unit sequentially supples fluid to the plurality of pressure chambers. A pressure welding position between the outer surface of the first structural body and the inner surface of the second structural body is sequentially changed by unit of the pressure chamber. Therefore, the second structural body rotates in response to changes of the pressure welding position.

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patent: 4923376 (1990-05-01), Wright
Iwao Hayashi et al., "An Electromagnetic Cycloid MOtor", Journal of the Japan Society for Precision Engineering, vol. 61, No. 1, pp. 95-99, 1995.
A. Viviani, "Experimental and Theoretical Study of Hypocycloidal Motors with Two-Harmonic Field Windows", IEEE Transactions on Power Apparatus and Systems, vol. PAS-99, No.1, pp.292-300, 1980.
W. Trimmer et al., "An Operational Harmonic Electrostatic Motor", Proc. IEEE Micro Electro Mechanical Systems, pp. 13-16, Feb. 20, 1989.
S.C. Jacobsen et al., "The Wobble Motor: An Electrostatic, Planetary-Armature, Microacutuator", Proc. IEEE Micro Electro Mechanical Systems, pp. 17-24, Feb. 20, 1989.

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