US4734610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration wave motor
Assignee: Canon Inc
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Filing: 1987-03-23
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Granted: 1988-03-29
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Expires: 2007-03-23
Abstract
Abstract A vibration wave motor includes circular shape vibration part having a helical stepped portion inside or outside thereof; a unit, coupled to said vibration part for causing the vibration part to generate a travelling vibration wave propagating along a circumferential direction of the vibration part; and a movable part having a stepped portion threadably engaged with the helical stepped portion, the movable part being frictionally driven by the travelling vibration wave generated by the vibration part.
Inventors
- 👤 Ichiro Okumura
- 👤 Hitoshi Mukohjima
- 👤 Sadayuki Ueha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:06
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/10; H02N2/16; H02N2/163; H02N2/12; H02N2/123; H02N2/126
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
77 words
A vibration wave motor comprising: (a) circular shape vibration means having a helical stepped portion inside or outside thereof; (b) means, coupled to said vibration means, for causing said vibration means to generate a travelling vibration wave propagating along a circumferential direction of said vibration means; and (c) movable means having a stepped portion, threadably engaged with said helical stepped portion said movable means being frictionally driven by the travelling vibration wave generated by said vibration means.
Claim 2
Dependent Claim
77 words
A vibration wave motor comprising: (a) circular shape vibration means having a helical stepped portion inside or outside thereof; (b) means, coupled to said vibration means, for causing said vibration means to generate a travelling vibration wave propagating along a circumferential direction of said vibration means; and (c) movable means having a stepped portion, threadably engaged with said helical stepped portion said movable means being frictionally driven by the travelling vibration wave generated by said vibration means.
Claim 3
Dependent Claim
24 words
A motor according to claim 1, wherein said vibration means comprises a female threaded portion engaged with said stepped portion of said movable means.
Claim 4
Dependent Claim
24 words
A motor according to claim 2, wherein said movable means comprises a male threaded portion engaged with said stepped portion of said vibration means.
Claim 5
Dependent Claim
45 words
A motor according to claim 1, wherein said generating means has electro-mechanical conversion elements connected to said vibration means in such a manner that said vibration means generates the travelling vibration wave when electrical signals having a phase difference therebetween are applied to said elements.
Claim 6
Dependent Claim
24 words
A motor according to claim 1, wherein said vibration means comprises a male threaded portion engaged with said stepped portion of said movable means.
Claim 7
Dependent Claim
24 words
A motor according to claim 1, wherein said movable means comprises a female threaded portion engaged with said stepped portion of said vibration means.
Claim 8
Dependent Claim
45 words
A motor according to claim 1, wherein said generating means has electro-mechanical conversion elements connected to said vibration means in such a manner that said vibration means generates the travelling vibration wave when electrical signals having a phase difference therebetween are applied to said elements.
Claim 9
Dependent Claim
85 words
A vibration wave motor comprising: (a) cylindrical vibration means having a helical stepped portion inside or outside thereof; (b) a pair of electro-mechanical conversion means, respectively connected to end faces of said vibration means, for causing said vibration means to generate a travelling vibration wave propagating along a circumferential direction of said vibration means; and (c) movable means having a stepped portion threadably engaged with said helical stepped portion, said movable means being frictionally driven by the travelling vibration wave generated by said vibration means.
Claim 10
Dependent Claim
85 words
A vibration wave motor comprising: (a) cylindrical vibration means having a helical stepped portion inside or outside thereof; (b) a pair of electro-mechanical conversion means, respectively connected to end faces of said vibration means, for causing said vibration means to generate a travelling vibration wave propagating along a circumferential direction of said vibration means; and (c) movable means having a stepped portion threadably engaged with said helical stepped portion, said movable means being frictionally driven by the travelling vibration wave generated by said vibration means.
Claim 11
Dependent Claim
32 words
A motor according to claim 8, wherein said vibration means generates the travelling vibration wave when electrical signals having a phase difference therebetween are applied to said pair of electro-mechanical conversion means.
Claim 12
Dependent Claim
114 words
A vibration wave motor comprising: (a) circular shape vibration means having a helical stepped portion inside or outside thereof, said vibration means being provided with an engaging portion in part thereof; (b) means, coupled to said vibration means, for causing said vibration means to generate a travelling vibration wave propagating along a circumferential direction of said vibration means; (c) movable means having a stepped portion threadably engaged with said helical stepped portion, said movable means being frictionally driven by the travelling vibration wave generated by said vibration means; and (d) fixing means having an engaging portion engaged with said engaging portion of said vibration means, for fixing said vibration means at a predetermined position.
Claim 13
Dependent Claim
114 words
A vibration wave motor comprising: (a) circular shape vibration means having a helical stepped portion inside or outside thereof, said vibration means being provided with an engaging portion in part thereof; (b) means, coupled to said vibration means, for causing said vibration means to generate a travelling vibration wave propagating along a circumferential direction of said vibration means; (c) movable means having a stepped portion threadably engaged with said helical stepped portion, said movable means being frictionally driven by the travelling vibration wave generated by said vibration means; and (d) fixing means having an engaging portion engaged with said engaging portion of said vibration means, for fixing said vibration means at a predetermined position.
Claim 14
Dependent Claim
29 words
A motor according to claim 10, wherein said engaging portion of said fixing means includes an L-shaped distal end portion engaged with said engaging portion of said vibration means.
Claim 15
Dependent Claim
19 words
A motor according to claim 11, wherein said engaging portion of said vibration means includes a plurality of recesses.
Claim 16
Dependent Claim
19 words
A motor according to claim 10, wherein said engaging portion of said vibration means includes a plurality of projections.
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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) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |