Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2010-10-22
2011-11-22
Budd, Mark (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
Reexamination Certificate
active
08063537
ABSTRACT:
There is provided a linear drive ultrasonic motor of which, a size can be made small, and in which, it is possible to guide assuredly while reducing a transfer resistance and a frictional resistance of a driven member.A 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 rolling member having a spherical shape, which makes a contact with the driven member, and a base member which movably supports the driven member via the rolling member, and the rolling member makes a contact with the driven member at a first contact point, and makes a contact with the base member at two second contact points, and lengths of two straight lines connecting the first contact point and two second contact points are substantially same.
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Budd Mark
Olympus Corporation
Scully , Scott, Murphy & Presser, P.C.
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