Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1987-01-20
1988-07-12
Budd, Mark O.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 80, 310 82, 310328, 310331, H02K 706
Patent
active
047572230
ABSTRACT:
A linear actuator constructed so as to convert deformation movements of a plurality of electrostrictive elements to a reciprocating movement of an output shaft thereof. The linear actuator comprises a planetary driving unit adapted to be driven by a plurality of electrostrictive elements in a casing body thereof, a precessional driving unit adapted to be driven by a plurality of electrostrictive elements therein a contact ring connected interlockingly to both the planetary driving unit and the precessional driving unit therein and the output shaft engaged loosely to the interior surface of the contact ring and supported reciprocatively by the casing body. The voltages applied to the electrostrictive elements are controlled so as for the contact ring to be driven to perform a planetary movement with being pressed onto the output shaft and to be driven to perform a precessional movement by the precessional driving unit. The contact point between the contact ring and the output shaft results in being driven to perform a relative movement with describing a spiral path by those planetary and precessional movements.
REFERENCES:
patent: 2439499 (1948-04-01), Williams
patent: 3894255 (1975-07-01), Newton, Jr.
patent: 3902085 (1975-08-01), Bizzigotti
patent: 4495432 (1985-01-01), Katsuma
patent: 4557153 (1985-12-01), Ulbing
patent: 4607166 (1986-08-01), Tamaki
patent: 4622483 (1986-11-01), Staufenberg, Jr.
Budd Mark O.
Dainippon Screen Mfg. Co,. Ltd.
Jones Judson H.
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