Linear drive ultrasonic motor

Details Linear drive ultrasonic motor Linear drive ultrasonic motor

2009-11-20

2010-11-16

Budd, Mark (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

Reexamination Certificate

active

07834517

ABSTRACT:
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 ultrasonic vibrator and the driven member, 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. The rolling member makes a contact with the base member at a first contact point, and makes a contact with the driven member at two second contact points. Lengths of two straight lines which connect the first contact point and the two second contact points are substantially same.

REFERENCES:
patent: 5191688 (1993-03-01), Takizawa et al.
patent: 6218767 (2001-04-01), Akada et al.
patent: 6831393 (2004-12-01), Miyazawa
patent: 7268464 (2007-09-01), Kishi
patent: 7679265 (2010-03-01), Higashionji et al.
patent: 3524248 (2004-02-01), None
Abstract of Japanese Patent Publication No. 09-191670, dated Jul. 22, 1997.

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