US4723085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration wave motor
Assignee: Canon Inc
•
Filing: 1987-07-06
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Granted: 1988-02-02
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Expires: 2007-07-06
Abstract
Abstract A vibration wave motor generates a travelling torsional vibration wave in a vibration member to drive a movable member.
Inventors
- 👤 Hitoshi Mukohjima
- 👤 Akira Hiramatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:53
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/02; H02N2/08; H02N2/10; H02N2/16; H02N2/163
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
A vibration wave motor comprising: an elastic member; first and second groups of polarized piezo-electric elements, said groups being located at different positions of said elastic member, and each group comprising a plurality of piezo-electric elements; periodic signal applying means for respectively applying periodic signals having phases different from each other to said first and second piezo-electric elements to form a travelling vibration wave, wherein the periodic signals are respectively applied to each said piezo-electric element in a direction perpendicular to the polarization of the element; and a movable member driven by said travelling vibration wave.
Claim 2
Dependent Claim
96 words
A vibration wave motor comprising: an elastic member; first and second groups of polarized piezo-electric elements, said groups being located at different positions of said elastic member, and each group comprising a plurality of piezo-electric elements; periodic signal applying means for respectively applying periodic signals having phases different from each other to said first and second piezo-electric elements to form a travelling vibration wave, wherein the periodic signals are respectively applied to each said piezo-electric element in a direction perpendicular to the polarization of the element; and a movable member driven by said travelling vibration wave.
Claim 3
Dependent Claim
19 words
A vibration wave motor according to claim 1, wherein said plural piezo-electric elements are integrally formed as a unit.
Claim 4
Dependent Claim
16 words
A vibration wave motor according to claim 1, wherein said elastic member has an annular shape.
Claim 5
Dependent Claim
90 words
A vibration wave motor comprising: a piezo-electric member, said piezo-electric member including first and second polarization portions which are located at different positions; periodic signal applying means for respectively applying periodic signals having phases different from each other to said first and second polarization portions of said first and second piezo-electric elements to form a travelling vibration wave, wherein the periodic signals are respectively applied to each said piezo-electric element in a direction perpendicular to the polarization of the element; and a movable member driven by said travelling vibration wave.
Claim 6
Dependent Claim
90 words
A vibration wave motor comprising: a piezo-electric member, said piezo-electric member including first and second polarization portions which are located at different positions; periodic signal applying means for respectively applying periodic signals having phases different from each other to said first and second polarization portions of said first and second piezo-electric elements to form a travelling vibration wave, wherein the periodic signals are respectively applied to each said piezo-electric element in a direction perpendicular to the polarization of the element; and a movable member driven by said travelling vibration wave.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |