Vibration wave driven apparatus

Details Vibration wave driven apparatus Vibration wave driven apparatus

1990-12-14

1991-08-20

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

050417509

ABSTRACT:
In a vibration wave driven apparatus, a vibration member of a closed loop shape having at least one set of parallel straight portions is provided on one of the straight portions with a projection group in which in the driving frequency of the vibration member, the vibration mode is the 1st-order mode of the fixed end-free end vibration and on the other straight portion with a projection group in which the vibration mode is the 2nd-order mode of the fixed end-free end vibration, whereby forces in the same direction which are not couples are generated in the both straight portions to thereby enable an object to be rectilinearly driven in a plane formed by the straight portions, thus preventing the irregularity of feeding speed and any partial wear caused by one-sided contact and enabling the drive force to be increased.

REFERENCES:
patent: 4580073 (1986-04-01), Okumura et al.

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