US4743791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration wave motor
Assignee: Canon Inc
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Filing: 1986-10-31
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Granted: 1988-05-10
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Expires: 2006-10-31
Abstract
Abstract A vibration wave motor having a vibration member for generating a travelling vibration wave by applying a drive signal to an electro-mechanical energy transducer and a movable member displaced by the vibration wave, characterized in that the vibration member and the movable member are kept in press-contact by a dished spring.
Inventors
- 👤 Tohru Kawai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:26
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/10; H02N2/16; H02N2/163; G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/08; H02N2/0005; H02N2/005; H02N2/0055; H02N2/006
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
62 words
A vibration wave motor comprising: (a) vibration means having an electro-mechanical energy conversion element, for generating a travelling vibration wave when electrical signals are applied to the conversion element; (b) movable member arranged to be frictionally driven by the vibration means; and (c) cone-shaped, disc spring means arranged to be in a press-contact relationship between said vibration means and said movable member.
Claim 2
Dependent Claim
62 words
A vibration wave motor comprising: (a) vibration means having an electro-mechanical energy conversion element, for generating a travelling vibration wave when electrical signals are applied to the conversion element; (b) movable member arranged to be frictionally driven by the vibration means; and (c) cone-shaped, disc spring means arranged to be in a press-contact relationship between said vibration means and said movable member.
Claim 3
Dependent Claim
27 words
A vibration wave motor according to claim 1, wherein said cone-shaped, disc spring means generates a substantially constant pressure over a wide range of the flexure thereof.
Claim 4
Dependent Claim
21 words
A vibration wave motor according to claim 1, wherein said cone-shaped, disc spring means includes a plurality of cone-shaped, disc springs.
Claim 5
Dependent Claim
69 words
A vibration wave motor according to claim 3, wherein said cone-shaped, disc springs are stacked one on another such that said cone-shaped, disc springs contact one another at an edge surface thereof and an edge surface of one of said cone-shaped, disc springs, which is not in contact with an edge surface of the other cone-shaped, disc springs, and is functionally coupled with an edge of said vibration means.
Claim 6
Dependent Claim
104 words
A motorized lens barrel holding a photographic lens, comprising: (a) a rotary tube having a helicoid screw; (b) a straight tube for holding said lens and having a screw portion engaged with said helicoid screw; (c) vibration means having an electro-mechanical energy conversion element, for generating a travelling vibration wave when electrical signals are applied to the conversion element; (d) a rotor coupled with said rotary tube for rotating said rotary tube, said rotor being arranged to be frictionally driven by the vibration means; and (e) cone-shaped, disc spring means arranged to be in a press-contact relationship between said vibration means and said rotor.
Claim 7
Dependent Claim
104 words
A motorized lens barrel holding a photographic lens, comprising: (a) a rotary tube having a helicoid screw; (b) a straight tube for holding said lens and having a screw portion engaged with said helicoid screw; (c) vibration means having an electro-mechanical energy conversion element, for generating a travelling vibration wave when electrical signals are applied to the conversion element; (d) a rotor coupled with said rotary tube for rotating said rotary tube, said rotor being arranged to be frictionally driven by the vibration means; and (e) cone-shaped, disc spring means arranged to be in a press-contact relationship between said vibration means and said rotor.
Claim 8
Dependent Claim
28 words
A lens barrel according to claim 5, further comprising: (a) stationary tube arranged at a predetermined position, said cone-shaped, disc spring means being coupled with said stationary tube.
Claim 9
Dependent Claim
20 words
A lens barrel according to claim 5, wherein said cone-shaped, disc spring means includes a plurality of cone-shaped, disc springs.
References Cited (Backward Citations)
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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) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |