US4587452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration wave motor having a vibrator of non-uniform elastic modulus
Assignee: Canon Inc
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Filing: 1984-04-11
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Granted: 1986-05-06
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Expires: 2004-04-11
Abstract
Abstract In a vibration wave motor for driving a movable member contacting a vibration member by a travelling vibration wave generated in the vibration member attached to electrostrictive elements, by applying a periodic voltage to the electrostrictive elements. The vibration member is of two-plate structure having a non-uniform elastic modulus in the direction of amplitude of the travelling vibration wave.
Inventors
- 👤 Ichiro Okumura
- 👤 Kazuhiro Izukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:35
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/10; H02N2/16; H02N2/163
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
63 words
A vibration wave motor comprising: electrostrictive elements; a vibration member for generating a travelling vibration wave when voltages having a phase difference therebetween are applied to said electrostrictive elements, said vibration member having a non-uniform elastic modulus in a direction of amplitude of the travelling vibration wave; and a movable member frictionally driven by the travelling vibration wave generated in said vibration member.
Claim 2
Dependent Claim
63 words
A vibration wave motor comprising: electrostrictive elements; a vibration member for generating a travelling vibration wave when voltages having a phase difference therebetween are applied to said electrostrictive elements, said vibration member having a non-uniform elastic modulus in a direction of amplitude of the travelling vibration wave; and a movable member frictionally driven by the travelling vibration wave generated in said vibration member.
Claim 3
Dependent Claim
44 words
A vibration wave motor according to claim 1, wherein said vibration member is a two-plate structure having different elastic moduli with the plate facing said electrostrictive elements having a higher elastic modulus and the plate facing said movable member having a lower elastic modulus.
Claim 4
Dependent Claim
79 words
A vibration wave motor comprising: electrostrictive elements; a vibration member for generating a travelling vibration wave when voltages having a phase difference therebetween are applied to said electrostrictive elements, said vibration member having a non-uniform width in a direction normal to a plane defined by an amplitude direction and a travelling direction of the travelling vibration wave, with respect to the amplitude direction; and a movable member frictionally driven by the travelling vibration wave generated in said vibration member.
Claim 5
Dependent Claim
79 words
A vibration wave motor comprising: electrostrictive elements; a vibration member for generating a travelling vibration wave when voltages having a phase difference therebetween are applied to said electrostrictive elements, said vibration member having a non-uniform width in a direction normal to a plane defined by an amplitude direction and a travelling direction of the travelling vibration wave, with respect to the amplitude direction; and a movable member frictionally driven by the travelling vibration wave generated in said vibration member.
Claim 6
Dependent Claim
41 words
A vibration wave motor according to claim 3, wherein said vibration member has a shape which, in section, has a width, on a surface facing said movable member, which is smaller than the width on a surface facing said electrostrictive elements.
Claim 7
Dependent Claim
26 words
A vibration wave motor according to claim 3, wherein said vibration member has a non-uniform elastic modulus in the amplitude direction of the travelling vibration wave.
Claim 8
Dependent Claim
60 words
A vibration wave motor comprising: (a) a vibration member including electrostrictive elements for generating a travelling vibration wave by driving said electrostrictive elements, said vibration member having a tapered edge section in a plane perpendicular to the movement direction of said travelling vibration wave; (b) a movable member which is driven by the travelling vibration wave of said vibration member.
Claim 9
Dependent Claim
60 words
A vibration wave motor comprising: (a) a vibration member including electrostrictive elements for generating a travelling vibration wave by driving said electrostrictive elements, said vibration member having a tapered edge section in a plane perpendicular to the movement direction of said travelling vibration wave; (b) a movable member which is driven by the travelling vibration wave of said vibration member.
Claim 10
Dependent Claim
63 words
A vibration wave motor comprising: (a) a vibration member including electrostrictive elements for generating a travelling vibration wave by driving said electrostrictive elements, said vibration member having an inverted T shape section when viewed in a plane perpendicular to the movement direction of said travelling vibration wave; (b) a movable member which is driven by the travelling vibration wave of said vibration member.
Claim 11
Dependent Claim
63 words
A vibration wave motor comprising: (a) a vibration member including electrostrictive elements for generating a travelling vibration wave by driving said electrostrictive elements, said vibration member having an inverted T shape section when viewed in a plane perpendicular to the movement direction of said travelling vibration wave; (b) a movable member which is driven by the travelling vibration wave of said vibration member.
Claim 12
Dependent Claim
51 words
A vibration wave motor comprising: (a) a vibration member including electrostrictive elements which when driven cause deformation of said member to generate a travelling vibration wave, said vibration member having a tapered edge section; and (b) a movable member which is driven by the travelling vibration wave of said vibration member.
Claim 13
Dependent Claim
51 words
A vibration wave motor comprising: (a) a vibration member including electrostrictive elements which when driven cause deformation of said member to generate a travelling vibration wave, said vibration member having a tapered edge section; and (b) a movable member which is driven by the travelling vibration wave of said vibration member.
Claim 14
Dependent Claim
52 words
A vibration wave motor comprising: (a) a vibration member including electrostrictive elements which when driven cause deformation of said member to generate a travelling vibration wave, said vibration member having an inverted T shape section; and (b) a movable member which is driven by the travelling vibration wave of said vibration member.
Claim 15
Dependent Claim
52 words
A vibration wave motor comprising: (a) a vibration member including electrostrictive elements which when driven cause deformation of said member to generate a travelling vibration wave, said vibration member having an inverted T shape section; and (b) a movable member which is driven by the travelling vibration wave of said vibration member.
Claim 16
Dependent Claim
71 words
A motor comprising: (a) a vibration member having electro-mechanical energy conversion elements for generating a travelling wave therein, said vibration member having a neutral plane in which the stress is zero during vibration, which plane is substantially deviated away from the center of said vibration member in the amplitude direction of the travelling wave; and (b) a contact member for receiving the force of the travelling wave from said vibration member.
Claim 17
Dependent Claim
71 words
A motor comprising: (a) a vibration member having electro-mechanical energy conversion elements for generating a travelling wave therein, said vibration member having a neutral plane in which the stress is zero during vibration, which plane is substantially deviated away from the center of said vibration member in the amplitude direction of the travelling wave; and (b) a contact member for receiving the force of the travelling wave from said vibration member.
Claim 18
Dependent Claim
33 words
A motor according to claim 10, wherein the neutral plane of said vibration member is deviated from the center of said vibration member due to the non-uniform elastic modulus of said vibration member.
Claim 19
Dependent Claim
40 words
A motor according to claim 10, wherein the neutral plane of said vibration member is deviated from the center of said vibration member due to the non-uniform width of said vibration member in the amplitude direction of the travelling wave.
Claim 20
Dependent Claim
12 words
A motor according to claim 10, wherein said contact member is movable.
Claim 21
Dependent Claim
20 words
A motor according to claim 10, wherein said vibration member comprises a member which is fixed to said conversion element.
Claim 22
Dependent Claim
31 words
A motor according to claim 11, wherein said conversion elements comprise: (a) first electro-mechanical conversion elements; and (b) second electro-conversion elements spatially phase differentially arranged with respect to said first elements.
Claim 23
Dependent Claim
41 words
A motor according to claim 10, wherein the neutral plane of said vibration member is deviated from the center of said vibration member due to the non-uniform condition of a part of said vibration member other than said energy conversion elements.
Claim 24
Dependent Claim
36 words
A motor according to claim 12, wherein said vibration member, in section, has a width, on a surface facing said contact member, which is smaller than the width on a surface facing said electro-mechanical conversion elements.
Claim 25
Dependent Claim
17 words
A motor according to any one of claims 10-17, wherein said electro-mechanical conversion elements are electrostrictive elements.
Claim 26
Dependent Claim
16 words
A motor according to claim 10, wherein said neutral plane is offset from said contact member.
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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) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |