Linear drive ultrasonic motor

Details Linear drive ultrasonic motor Linear drive ultrasonic motor

2009-04-20

2010-06-08

Dougherty, Thomas M (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S323170

Reexamination Certificate

active

07732979

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 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, the pressing member, and the driven member, and a coupling member which is coupled with the driven member at an interior of the case member. The case member includes an opening portion for allowing a part of the coupling member to pass through.

REFERENCES:
patent: 4672256 (1987-06-01), Okuno et al.
patent: 5191688 (1993-03-01), Takizawa et al.
patent: 6218767 (2001-04-01), Akada et al.
patent: 7466063 (2008-12-01), Kim et al.
patent: 2009/0267454 (2009-10-01), Takizawa
patent: 3524248 (2004-02-01), None

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