Patent EP0450962A2 successfully refreshed from Google Patents.
EP0450962A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Vibration wave driven motor
Assignee: Canon Inc
•
Filing: 1991-04-04
•
Granted: —
•
Expires: 2011-04-04
Abstract
Abstract A vibration wave driven motor includes a vibrator, a plurality of driving electro-mechanical energy conversion element portions disposed in the direction of lamination relative to the vibrator, frequency signals of different phases being applied to the conversion element portions, and a monitoring electro-mechanical energy conversion element provided in the vibrator in the direction of lamination relative to the conversion element portions.
Inventors
- 👤 Akio C/O Canon Kabushiki Kaisha Atsuta
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 14:41
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/10; H02N2/14; H02N2/145; H02N2/147; H02N2/106
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
60 words
A vibration wave driven motor including: a) a vibrator; b) a plurality of laminated driving electromechanical energy conversion element portions fixed on said vibrator, frequency signals of different phases being applied to said conversion element portions respectively; and c) a monitoring electro-mechanical energy conversion element provided in said vibrator in the direction of lamination relative to said conversion element portions.
Claim 2
Dependent Claim
192 words
A vibration wave driven motor including: a) a vibrator; b) a first driving electro-mechanical energy conversion element portion disposed in said vibrator, said first conversion element portion comprising a first portion and a second portion differing in the direction of polarization from each other, a frequency signal being applied to said first conversion element portion; c) a second driving electro-mechanical energy conversion element portion disposed in said vibrator, said second conversion element portion being disposed in the direction of lamination relative to said first driving electro-mechanical energy conversion element portion, said second driving electro-mechanical energy conversion element portion comprising a first portion and a second portion differing in the direction of polarization from each other, a frequency signal differing in phase from the frequency signal applied to said first conversion element portion being applied to said second conversion element portion, said second conversion element portion and said first conversion element portion being disposed with a difference in the phase of polarization; and. d) a detecting electro-mechanical energy conversion element portion disposed in said vibrator, said conversion element portion being disposed in the direction of lamination relative to said energy conversion element portions.
Claim 3
Independent Claim
92 words
An apparatus provided with a vibration wave driven motor, said apparatus including: a) a vibrator; b) a plurality of driving electro-mechanical energy conversion element portions disposed in the direction of lamination relative to said vibrator, frequency signals of different phases being applied to said conversion element portions; c) a monitoring electro-mechanical energy conversion element provided in said vibrator in the direction of lamination relative to said conversion element portions; and d) an adjusting circuit for adjusting said frequency signals on the basis of the output of said monitoring electro-mechanical energy conversion element.
Claim 4
Independent Claim
220 words
An apparatus provided with a vibration wave driven motor, said apparatus including: a) a vibrator; b) a first driving electro-mechanical energy conversion element portion disposed in said vibrator, said first conversion element portion comprising a first portion and a second portion differing in the direction of polarization from each other, a frequency signal being applied to said first conversion element portion; c) a second driving electro-mechanical energy conversion element portion disposed in said vibrator, said second conversion element portion being disposed in the direction of lamination relative to said first driving electro-mechanical energy conversion element portion, said second driving electro-mechanical energy conversion element portion comprising a first portion and a second portion differing in the direction of polarization from each other, a frequency signal differing in phase from the frequency signal applied to saif first conversion element portion being applied to said second conversion element portion, said second conversion element portion and said first conversion element portion being disposed with a difference in the phase of polarization; d) a detecting electro-mechanical energy conversion element portion disposed in said vibrator, said conversion element portion being disposed in the direction of lamination relative to said energy conversion element portions; and e) an adjusting circuit for adjusting said frequency signals on the basis of the output of said monitoring electro-mechanical energy conversion element.
Claim 5
Dependent Claim
32 words
A vibration wave driven motor according to Claim 1 or 3, wherein said monitoring electro-mechanical energy conversion element is divided into two portions differing in the direction of polarization from each other.
Claim 6
Dependent Claim
21 words
A vibration wave driven motor according to Claim 5, wherein said monitoring electro-mechanical energy conversion element is of a circular shape.
Claim 7
Dependent Claim
21 words
A vibration wave driven motor according to Claim 6, wherein a plurality of said monitoring electro-mechanical energy conversion elements are provided.
Claim 8
Dependent Claim
43 words
A vibration wave driven motor according to Claim 2 or 4, wherein said vibrator is of a-bar-like shape and said first and second driving electro-mechanical energy conversion element portions are formed into a side configuration conforming to the side configuration of said vibrator.
Claim 9
Dependent Claim
31 words
A vibration wave driven motor according to Claim 8, wherein said detecting electro-mechanical energy conversion element portion is formed into a side configuration conforming to the side configuration of said vibrator.
Claim 10
Dependent Claim
41 words
A vibration wave driven motor according to Claim 9, wherein said vibrator is partly formed into a cylindrical shape, and said first and second driving electro-mechanical energy conversion element portions are disposed in a predetermined cross-section of said cylindrically shaped portion.
Claim 11
Dependent Claim
28 words
A vibration wave driven motor according to Claim 10, wherein said detecting electro-mechanical energy conversion element portion is disposed in a predetermined cross-section of said cylindrically shaped portion.
Claim 12
Dependent Claim
31 words
A vibration wave driven motor according to Claim 2 or 4, wherein said second conversion element portion is disposed between said first conversion element portion and said detecting conversion element portion.
Claim 13
Dependent Claim
59 words
A vibration wave driven motor according to Claim 2 or 4, wherein said detecting electro-mechanical energy conversion element portion comprises a first portion and a second portion differing in the direction of polarization from each other, and said detecting conversion element portion and said first conversion element portion are disposed so that their polarization phases may be the same.
Claim 14
Dependent Claim
51 words
A vibration wave driven motor according to Claim 2 or 4, wherein said vibrator comprises a first portion and a second portion disposed with its surface overlapping the surface of said first portion, and said first and second conversion element portions are disposed between said first portion and said second portion.
Claim 15
Dependent Claim
25 words
A vibration wave driven motor according to Claim 14, wherein said detecting conversion element portion is disposed between said first portion and said second portion.
Claim 16
Dependent Claim
117 words
A vibration wave driven motor according to Claim 15, wherein one surface of said first conversion element portion is disposed on the surface of said first portion, the other surface of said first conversion element portion is disposed in face-to-face relationship with one surface of said second conversion element portion, the other surface of said second conversion element portion is disposed in face-to-face relationship with one surface of an insulator with an electrode interposed therebetween, the other surface of said insulator is disposed in face-to-face relationship with one surface of said detecting conversion element portion, and the other surface of said detecting conversion element portion is disposed in face-to-face relationship with the surface of said second portion.
Claim 17
Dependent Claim
40 words
A vibration wave driven motor according to Claim 2 or 4, wherein said first and second conversion element portions and said detecting conversion element portion each are formed by a plurality of conversion element portions being superposed one upon another.
Claim 18
Dependent Claim
40 words
A vibration wave-driven motor characterised in that it is provided with an additional electro-mechanical energy conversion element which is incorporated in the control circuit so that in use the motor can be controlled to operate at substantially its resonant frequency.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.