Patent US2418627A successfully refreshed from Google Patents.
US4580073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration wave motor with plural projection vibrator
Assignee: Canon Inc
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Filing: 1984-04-12
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Granted: 1986-04-01
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Expires: 2004-04-12
Abstract
Abstract In a vibration wave motor for driving a movable member contacting a vibration member, a travelling vibration wave is generated in the vibration member by electrostrictive elements, applying a periodic voltage to the elements. The vibration member is divided into a number of projections on at least a surface facing the movable member.
Inventors
- 👤 Ichiro Okumura
- 👤 Kazuhiro Izukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/10; H02N2/16; H02N2/163; H02N2/0005; H02N2/005; H02N2/0065
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
62 words
A vibration wave motor comprising: electro-mechanical conversion elements; a vibration member for generating a travelling vibration wave when electrical signals having a phase difference therebetween are applied to said elements, said vibration member having one surface thereof divided into a plurality of projections; and a movable member adapted to be frictionally driven by the travelling vibration wave generated in said vibration member.
Claim 2
Dependent Claim
62 words
A vibration wave motor comprising: electro-mechanical conversion elements; a vibration member for generating a travelling vibration wave when electrical signals having a phase difference therebetween are applied to said elements, said vibration member having one surface thereof divided into a plurality of projections; and a movable member adapted to be frictionally driven by the travelling vibration wave generated in said vibration member.
Claim 3
Dependent Claim
35 words
A vibration wave motor according to claim 1, wherein said projections are on a surface facing said movable member and said vibration member has a continuous area on a surface facing said electro-mechanical conversion elements.
Claim 4
Dependent Claim
39 words
A vibration wave motor according to claim 1, wherein said plurality of projections have axes which extend perpendicularly from a plane of said vibration member which is parallel with a plane defining the contacting surface of said movable member.
Claim 5
Dependent Claim
27 words
A vibration wave motor according to claim 1, wherein each of said projections has a length which is set to be vibrated with said travelling vibration wave.
Claim 6
Dependent Claim
24 words
A vibration wave motor according to claim 1, wherein each of said projections has an edge on one side for driving said movable member.
Claim 7
Dependent Claim
17 words
A vibration wave motor according to claim 1, wherein each of said projections is cylindrical in shape.
Claim 8
Dependent Claim
18 words
A vibration wave motor according to claim 1, wherein each of said projections has a square, bar-like shape.
Claim 9
Dependent Claim
55 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 substantially perpendicular extended projections from a plane of another surface of said vibration member.
Claim 10
Dependent Claim
55 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 substantially perpendicular extended projections from a plane of another surface of said vibration member.
Claim 11
Dependent Claim
25 words
A motor according to claim 8, wherein each of said projections have a length which is set to resonantly vibrate with said travelling vibration wave.
Claim 12
Dependent Claim
62 words
A vibration wave motor according to claim 9, wherein said electro-mechanical energy conversion elements comprise: (a) a first element group connected with said vigration member, and (b) a second element group arranged with a predetermined phase difference with respect to said first element group; wherein electrical signals having a predetermined phase difference are respectively applied to said first and second element groups.
Claim 13
Dependent Claim
28 words
A motor according to claim 8, further comprising: a contact member contacting with the divided surface of said vibration member for receiving the force of said travelling vibration.
Claim 14
Dependent Claim
18 words
A motor according to any one of claims 8-11, wherein each of said projections is cylindrical in shape.
Claim 15
Dependent Claim
19 words
A motor according to any one of claim 8-11, wherein each of said projections has a square, bar-like shape.
Claim 16
Dependent Claim
61 words
A vibration wave motor according to claim 1, wherein said electro-mechanical conversion elements comprise: (a) a first element group connected with said vibration member, and (b) a second element group arranged with a predetermined phase difference with respect to said first element group; wherein electrical signals having a predetermined phase difference are respectively applied to said first and second element groups.
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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) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |