US4954742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibratory-wave motor device
Assignee: Canon Inc
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Filing: 1988-12-30
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Granted: 1990-09-04
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Expires: 2008-12-30
Abstract
Abstract A vibratory-wave motor which forms a progressive vibratory wave with a frequency signal applied to a piezoelectric body is arranged to permit adjustment of a torque of contact with its rotor by adjusting as desired the driving frequency of the signal particularly when the motor is operated in a mode in which a stationary wave is formed instead of the progressive vibratory wave.
Inventors
- 👤 Kazuhiro Izukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:54
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/10; H02N2/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
148 words
A vibratory-wave motor device having a first mode in which a vibratory wave is formed by applying frequency signals of different phsaes to first and second electro-mechanical energy converting parts, repsectively, which are disposed at different positions on a first structural member and a second mode in which a standing wave is formed by applying a frequency signal to said first electro-mechanical energy converting part, comprising: an adjustment circuit arranged to variably adjust the frequency of said frequency signal in said second mode; monitor means for monitoring a driven state of said motor device; and setting means for setting a predetermined setting value; wherein said adjustment circuit is arranged to adjust said frequency in accordance with an output of said monitor means and a setting value set by said setting means such that the output of said monitor means comes into a state corresponding to said setting value.
Claim 2
Dependent Claim
148 words
A vibratory-wave motor device having a first mode in which a vibratory wave is formed by applying frequency signals of different phsaes to first and second electro-mechanical energy converting parts, repsectively, which are disposed at different positions on a first structural member and a second mode in which a standing wave is formed by applying a frequency signal to said first electro-mechanical energy converting part, comprising: an adjustment circuit arranged to variably adjust the frequency of said frequency signal in said second mode; monitor means for monitoring a driven state of said motor device; and setting means for setting a predetermined setting value; wherein said adjustment circuit is arranged to adjust said frequency in accordance with an output of said monitor means and a setting value set by said setting means such that the output of said monitor means comes into a state corresponding to said setting value.
Claim 3
Dependent Claim
26 words
A device according to claim 1, wherein said monitor means monitors the driven state of said motor device by monitoring said first electro-mechanical energy converting part.
Claim 4
Dependent Claim
46 words
A device according to claim 1, wherein said adjustment circuit is arranged to detect a phase difference between said frequency signal and the output of said monitor means and to adjust said frequency such that said phase difference reaches a value corresponding to said setting value.
Claim 5
Dependent Claim
18 words
A device according to claim 3, wherein said first and second electro-mechanical energy converting parts are piezoelectric bodies.
Claim 6
Dependent Claim
18 words
A device according to claim 3, wherein said first and second electro-mechanical energy converting parts are electrostrictive elements.
Claim 7
Dependent Claim
130 words
A vibratory-wave motor device arranged to form a standing wave by applying a frequency signal to an electro-mechanical energy converting part on a first structural member, comprising: an adjustment circuit arranged to adjust the frequency of said frequency signal so as to adjust a contact force between said first structural member and a second structural member which is in contact with said first structural member; monitor means for monitoring a driven state of said motor device; and setting means for setting a predetermined setting value; wherein said adjustment circuit is arranged to adjust said frequency in accordance with an output of said monitor means and a setting value set by said setting means such that the output of said monitor means comes into a state corresponding to said setting value.
Claim 8
Dependent Claim
130 words
A vibratory-wave motor device arranged to form a standing wave by applying a frequency signal to an electro-mechanical energy converting part on a first structural member, comprising: an adjustment circuit arranged to adjust the frequency of said frequency signal so as to adjust a contact force between said first structural member and a second structural member which is in contact with said first structural member; monitor means for monitoring a driven state of said motor device; and setting means for setting a predetermined setting value; wherein said adjustment circuit is arranged to adjust said frequency in accordance with an output of said monitor means and a setting value set by said setting means such that the output of said monitor means comes into a state corresponding to said setting value.
Claim 9
Dependent Claim
25 words
A device according to claim 6, wherein said monitor means monitors the drive state of said motor device by monitoring said electro-mechanical energy converting part.
Claim 10
Dependent Claim
46 words
A device according to claim 6, wherein said adjustment circuit is arranged to detect a phase difference between said frequency signal and the output of said monitor means and to adjust said frequency such that said phase difference reaches a value corresponding to said setting value.
Claim 11
Dependent Claim
16 words
A device according to claim 8, wherein said electro-mechanical energy converting part is a piezoelectric body.
Claim 12
Dependent Claim
16 words
A device according to claim 8, wherein said electro-mechanical energy converting part is an electrostrictive element.
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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) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |