Piezoelectrically driving device
Patent 4742260 Issued on May 3, 1988. Estimated Expiration Date: 
January 28, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 28, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3131320 3238789 3354413 Piezoelectric motor structures Flexural transducer Supersonic vibration driven motor device Tuning fork-shaped quartz oscillator Piezoelectric motor with two part rotor Motor device utilizing ultrasonic oscillation Actuator Patent #: 4613782 InventorsAssigneeApplicationNo. 07/007673 filed on 01/28/1987US Classes:310/323.16, Eliptical motion at fixed point (i.e., walking) or Ratchet and Pawl motor310/330, Bending type310/331, Plural elements310/366, More than two310/370"U" or "tuning fork" shapeExaminersPrimary: Budd, Mark O.Attorney, Agent or FirmInternational ClassesH01L 41/09 (20060101)H01H 57/00 (20060101) Foreign Application Priority Data1986-02-06 JPAbstractA piezoelectrically driving device comprises a driving part including paired opposing pole parts substantially square shaped in section, piezoelectric elements provided at least to two adjacent faces of each of the opposing pole parts for causing them to flectionally vibrate resonantly in response to an applied high frequency voltage, and a contact member contactable with one face of each of the opposing pole parts for movement relative thereto or vice versa due to the vibration, any energy loss upon which movement is thereby remarkable restrained and a mechanical driving force can be obtained highly efficiently. | |
