Electricity: motive power systems – Reciprocating or oscillating motor
Reexamination Certificate
2011-06-14
2011-06-14
Duda, Rina I (Department: 2837)
Electricity: motive power systems
Reciprocating or oscillating motor
C310S316010
Reexamination Certificate
active
07960925
ABSTRACT:
There is provided a method of driving an ultrasonic motor configured so that two alternating voltages having a predetermined difference between respective phases and having predetermined drive frequencies are applied to a laminated piezoelectric body that has driving parts abutting a member to be driven, whereby simultaneous excitation of vertical and bending vibrations and hence excitation of an elliptical vibration occur in the piezoelectric body, and the driving parts receiving drive force from the elliptical vibration drive the driven member. The method includes performing wear particle removal drive at a fixed frequency during regular reciprocal drive so as to intermittently interrupt the regular drive, the regular drive being such that the driving parts repeatedly reciprocally drive the driven member within a predetermined range, and the wear particle removal drive being such that the driving parts reciprocally drive the driven member within a removal drive range wider than the predetermined range.
REFERENCES:
patent: 5656881 (1997-08-01), Atsuta
patent: 7109639 (2006-09-01), Yamamoto et al.
patent: 7317291 (2008-01-01), Atsuta et al.
patent: 10-191658 (1998-07-01), None
Duda Rina I
Olympus Corporation
Scully , Scott, Murphy & Presser, P.C.
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