Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2011-08-16
2011-08-16
Benson, Walter (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S323010, C310S323020
Reexamination Certificate
active
07999439
ABSTRACT:
There is provided a linear drive ultrasonic motor which is capable of achieving a stable thrust, and which has fewer restrictions regarding a relationship with an external apparatus.The linear drive ultrasonic motor includes at least an ultrasonic vibrator having a piezoelectric element, a driven member which is driven by a frictional force between the driven member and the ultrasonic vibrator, a pressing member which presses the ultrasonic vibrator such that a frictional force is generated between the ultrasonic vibrator and the driven member, a case member which accommodates the ultrasonic vibrator and the pressing member, and a base member which movably supports the driven member, and the case member is assembled with the base member, in a state of a central portion of the pressing member making a contact with the ultrasonic vibrator, and two end portions sandwiching at least the central portion, from among the end portions of the pressing member making a contact with the case member.
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Benson Walter
Gordon Bryan P
Olympus Corporation
Scully , Scott, Murphy & Presser, P.C.
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