Patent US4771203A successfully refreshed from Google Patents.
US4771203A
Expired / Lapsed
US
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Vibration wave motor
Assignee: Canon Inc
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Filing: 1987-02-20
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Granted: 1988-09-13
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Expires: 2007-02-20
Abstract
Abstract A vibration wave motor for generating a travelling vibration wave in a vibration member by applying a periodic voltage to an electro-mechanical energy transducer. An anti-movement device is provided to contact the vibration member at a pitch not equal to a multiple of nλ/2, where n is an integer and λ is the wavelength of a vibration wave so that the vibration member is prevented from rotating without reducing the drive efficiency of the motor.
Inventors
- 👤 Hitoshi Mukohjima
- 👤 Ichiro Okumura
- 👤 Tohru Kawai
- 👤 Takayuki Hirano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:22
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/10; H02N2/16; H02N2/163
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
59 words
A vibration wave motor for driving a movable member by a travelling vibration wave having a wavelength λ generated in a vibration member by applying a periodic voltage to a phasically arranged or polarized electromechanical energy transducer, comprising: anti-movement means contacting said vibration member at a pitch not equal to a multiple of nλ/2, where n is an integer.
Claim 2
Dependent Claim
59 words
A vibration wave motor for driving a movable member by a travelling vibration wave having a wavelength λ generated in a vibration member by applying a periodic voltage to a phasically arranged or polarized electromechanical energy transducer, comprising: anti-movement means contacting said vibration member at a pitch not equal to a multiple of nλ/2, where n is an integer.
Claim 3
Dependent Claim
21 words
A vibration wave motor according to claim 1 wherein said pitch is equal to nλ/4, where n is an odd number.
Claim 4
Dependent Claim
37 words
A vibration wave motor according to claim 1 wherein said vibration means has a plurality of slits normal to the direction of travel of the vibration wave, and said anti-movement means engages the slits at said pitch.
Claim 5
Dependent Claim
17 words
A vibration wave motor according to claim 1 wherein said vibration member is of a ring shape.
Claim 6
Dependent Claim
17 words
A vibration wave motor according to claim 1 wherein said electro-mechanical energy transducer is an electrostrictive element.
Claim 7
Dependent Claim
17 words
A vibration wave motor according to claim 1 wherein said electro-mechanical energy transducer is a piezoelectric element.
Claim 8
Dependent Claim
59 words
A vibration wave motor for driving a movable member by a travelling vibration wave having a wave length λ generated in a vibration member by applying a periodic voltage to a phasically arranged or polarized electro-mechanical energy tranceducer, comprising: (a) said vibration member having a plurality of slits normal to the direction of travel of the vibration wave; and
Claim 9
Dependent Claim
59 words
A vibration wave motor for driving a movable member by a travelling vibration wave having a wave length λ generated in a vibration member by applying a periodic voltage to a phasically arranged or polarized electro-mechanical energy tranceducer, comprising: (a) said vibration member having a plurality of slits normal to the direction of travel of the vibration wave; and
Claim 10
Dependent Claim
11 words
(b) anti-movement means contacting said vibration member to engage the slits.
Claim 11
Dependent Claim
11 words
(b) anti-movement means contacting said vibration member to engage the slits.
Claim 12
Dependent Claim
73 words
A vibration wave motor comprising: (a) electro-mechanical energy conversion elements; (b) a vibration member for generating a travelling wave when an electrical signal is applied to said conversion elements, said vibration member having one surface thereof divided into a plurality of perpendicular extended projections from a plane of another surface of said vibration member; and (c) anti-movement means contacting the projections of said vibration member for preventing the movement of said vibration member.
Claim 13
Dependent Claim
73 words
A vibration wave motor comprising: (a) electro-mechanical energy conversion elements; (b) a vibration member for generating a travelling wave when an electrical signal is applied to said conversion elements, said vibration member having one surface thereof divided into a plurality of perpendicular extended projections from a plane of another surface of said vibration member; and (c) anti-movement means contacting the projections of said vibration member for preventing the movement of said vibration member.
Claim 14
Dependent Claim
17 words
A vibration wave motor according to claim 8, wherein said vibration member is of a ring shape.
Claim 15
Dependent Claim
17 words
A vibration wave motor according to claim 9, wherein said anti-movement means is of a ring shape.
Claim 16
Dependent Claim
25 words
A vibration wave motor according to claim 10, wherein said anti-movement means have at least one projection engaged with the projection of said vibration member.
Claim 17
Dependent Claim
24 words
A vibration wave motor according to claim 11, wherein the projection of said anti movement means is inserted between projections of the vibration member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |