US5034649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric actuator
Assignee: Mitsubishi Chemical Corp
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Filing: 1990-09-28
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Granted: 1991-07-23
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Expires: 2010-09-28
Abstract
Abstract A piezoelectric actuator comprising a longitudinal effect-type laminated piezoelectric element composed of piezoelectric ceramic sheets laminated in their thickness direction, and a supporting member fixed to one side in the longitudinal direction of the element and being bending and capable of constraining expansion of the element.
Inventors
- 👤 Yukio Chida
- 👤 Tetsuhiko Nishimura
- 👤 Yasuo Oguri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:40
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/20; H10N30/204; H10N30/2041; H10N30/2042
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
A piezoelectric actuator comprising a longitudinal effect-type laminated piezoelectric element composed of piezoelectric ceramic sheets, laminated in their thickness direction, and a supporting member made of a ceramic material fixed to one side in the longitudinal direction of said longitudinal piezoelectric element and being bendable and capable of constraining expansion of said longitudinal piezoelectric element, wherein said supporting member is a transversal effect-type piezoelectric element contractible in a direction opposite to the direction of expansion of said longitudinal effect-type laminated piezoelectric element.
Claim 2
Dependent Claim
82 words
A piezoelectric actuator comprising a longitudinal effect-type laminated piezoelectric element composed of piezoelectric ceramic sheets, laminated in their thickness direction, and a supporting member made of a ceramic material fixed to one side in the longitudinal direction of said longitudinal piezoelectric element and being bendable and capable of constraining expansion of said longitudinal piezoelectric element, wherein said supporting member is a transversal effect-type piezoelectric element contractible in a direction opposite to the direction of expansion of said longitudinal effect-type laminated piezoelectric element.
Claim 3
Dependent Claim
25 words
The piezoelectric actuator according to claim 1, wherein said longitudinal effect-type laminated piezoelectric element is made of a ceramic composition containing Pb, Zr, and Ti.
Claim 4
Dependent Claim
37 words
The piezoelectric actuator according to claim 1, wherein said supporting member is fixed to said longitudinal effect-type piezoelectric element with an insulating layer interposed therebetween, when at least the surface of said supporting member is electrically conductive.
Claim 5
Dependent Claim
24 words
The piezoelectric actuator according to claim 1, wherein said transversal effect-type piezoelectric element is made of a ceramic composition containing Pb, Zr, and Ti.
Claim 6
Dependent Claim
97 words
A piezoelectric actuator comprising a longitudinal effect-type laminated piezoelectric element composed of piezoelectric ceramic sheets, laminated in their thickness direction, and a supporting member made of a ceramic material fixed to one side in the longitudinal direction of said longitudinal piezoelectric element and being bendable and capable of constraining expansion of said longitudinal piezoelectric element, wherein said supporting member is a transversal effect-type piezoelectric element contractible in a direction opposite to the direction of expansion of said longitudinal effect-type laminated piezoelectric element, wherein said piezoelectric actuator is a cantilever which is capable of displacement at one end.
Claim 7
Dependent Claim
97 words
A piezoelectric actuator comprising a longitudinal effect-type laminated piezoelectric element composed of piezoelectric ceramic sheets, laminated in their thickness direction, and a supporting member made of a ceramic material fixed to one side in the longitudinal direction of said longitudinal piezoelectric element and being bendable and capable of constraining expansion of said longitudinal piezoelectric element, wherein said supporting member is a transversal effect-type piezoelectric element contractible in a direction opposite to the direction of expansion of said longitudinal effect-type laminated piezoelectric element, wherein said piezoelectric actuator is a cantilever which is capable of displacement at one end.
Claim 8
Dependent Claim
25 words
The piezoelectric actuator according to claim 5, wherein said longitudinal effect-type laminated piezoelectric element is made of a ceramic composition containing Pb, Zr and Ti.
Claim 9
Dependent Claim
37 words
The piezoelectric actuator according to claim 5, wherein said supporting member is fixed to said longitudinal effect-type piezoelectric element with an insulating layer interposed therebetween, when at least the surface of said supporting member is electrically conductive.
Claim 10
Dependent Claim
24 words
The piezoelectric actuator according to claim 5, wherein said transversal effect-type piezoelectric element is made of a ceramic composition containing Pb, Zr, and Ti.
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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) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |