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US 7,732,981 B2Granted
Ultrasonic motor having lightweight vibrating element
AssigneeSamsung Electronics Co., Ltd.
InventorsJi-hyuk Lim, Jin-woo Cho, Sung-hyuk Park
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Abstract
An ultrasonic motor includes a vibrating element having a piezoelectric body attached thereto to produce a traveling wave when the piezoelectric body is supplied with an electric power, and a contacting element to come in friction contact with the vibrating element when the vibrating element is vibrated by the traveling wave. The vibrating element is formed of a Mg-based alloy having a Mg content of more than 85% by weight.
Claims17
An ultrasonic motor comprising:
- a vibrating element;
- a piezoelectric body which is attached to the vibrating element and produces a traveling wave when the piezoelectric body is supplied with an electric power;
- and
- a contacting element which comes into friction contact with the vibrating element when the vibrating element is vibrated by the traveling wave,
- wherein the vibrating element is formed of a Mg-based alloy comprising more than 85% by weight of Mg.
2 more elements
An ultrasonic motor comprising:
- a vibrating element;
- a piezoelectric body which is attached to the vibrating element and produces a traveling wave when the piezoelectric body is supplied with an electric power;
- and
- a contacting element in which comes into friction contact with the vibrating element when the vibrating element is vibrated by the traveling wave,
- wherein the vibrating element is formed of a Mg-based alloy having a quality factor Q of about 100 to about 500.
2 more elements
Dependencies are inferred from the claim text.