EP 0958649 A2 19991124 - HIGH TORQUE ULTRASONIC MOTOR SYSTEM
Title (en)
HIGH TORQUE ULTRASONIC MOTOR SYSTEM
Title (de)
ULTRASCHALLMOTORSYSTEM MIT HOHEM DREHMOMENT
Title (fr)
SYSTEME DE MOTEUR ULTRASONIQUE A COUPLE ELEVE
Publication
Application
Priority
- US 9706871 W 19970417
- US 63365096 A 19960417
Abstract (en)
[origin: WO9739520A2] The present invention is a compact, low mass, and low power consumption piezoelectric ultrasonic motor with high torque. The piezoelectric ultrasonic motor of the present invention includes a polarized piezoelectric drive ring or wafer comprised of a plurality of arc piece piezoelectric elements. The piezoelectric ultrasonic motor can utilize one or a plurality of piezoelectric wafers stacked as layers to increase the torque of the motor. Also, a series of the piezoelectric motors can be stacked and operated synchronously, as one motor, to maximize the torque within the volume, mass and power specification limitations of a specific application.
IPC 1-7
IPC 8 full level
H01L 41/09 (2006.01); H02N 2/16 (2006.01)
CPC (source: EP)
H02N 2/163 (2013.01); H10N 30/505 (2023.02)
Citation (search report)
See references of WO 9739520A2
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
WO 9739520 A2 19971023; WO 9739520 A3 19971120; AU 2925097 A 19971107; EP 0958649 A2 19991124
DOCDB simple family (application)
US 9706871 W 19970417; AU 2925097 A 19970417; EP 97923449 A 19970417