US4862030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezo-electric device
Assignee: Coorstek KK
•
Filing: 1988-02-17
•
Granted: 1989-08-29
•
Expires: 2008-02-17
Abstract
Abstract A piezo-electric device such as a piezo bimorph device includes an intermediate plate, a plate-shaped first piezo ceramic element fixed on one surfaces of the intermediate plate, a plate-shaped second piezo ceramic element fixed on the other surface of the intermediate plate, and a lead wire for connecting the first piezo ceramic element with the second piezo ceramic element. The intermediate plate is made of a hardened tool steel containing carbon from 0.6 to 1.5%, or a fine ceramic material.
Inventors
- 👤 Katsunori Yokoyama
- 👤 Yukio Sato
- 👤 Shunzo Shimai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:04
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/20; H10N30/204; H10N30/2041; H10N30/2042; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0603; H10N30/80; H10N30/85; H10N30/853
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
95 words
A piezo-electric device comprising: an intermediate plate having opposite surfaces, a plate-like first piezo ceramic element fixed on one of the opposite surfaces of the intermediate plate, a plate-like second piezo ceramic element fixed on the other surface of the intermediate plate, the intermediate plate, the first piezo ceramic element and the second piezo ceramic element being arranged in a sandwich manner, a lead wire for connecting the first piezo ceramic element with the second piezo ceramic element, the intermediate plate being made of a ceramic material having an apparent porosity of 5% or less.
Claim 2
Dependent Claim
95 words
A piezo-electric device comprising: an intermediate plate having opposite surfaces, a plate-like first piezo ceramic element fixed on one of the opposite surfaces of the intermediate plate, a plate-like second piezo ceramic element fixed on the other surface of the intermediate plate, the intermediate plate, the first piezo ceramic element and the second piezo ceramic element being arranged in a sandwich manner, a lead wire for connecting the first piezo ceramic element with the second piezo ceramic element, the intermediate plate being made of a ceramic material having an apparent porosity of 5% or less.
Claim 3
Dependent Claim
19 words
A piezo-electric device as defined in claim 1, wherein the fine ceramic material is a simple oxide ceramic material.
Claim 4
Dependent Claim
19 words
A piezo-electric device as defined in claim 1, wherein the fine ceramic material is a composite oxide ceramic material.
Claim 5
Dependent Claim
17 words
A piezo-electric device as defined in claim 1, wherein the fine ceramic material is non-oxide ceramic material.
Claim 6
Dependent Claim
39 words
A piezo-electric device as defined in claim 1, wherein the first and second piezo ceramic elements each consists of two halves which are separated from each other along a center line of the intermediate plate in its longitudinal direction.
Claim 7
Dependent Claim
36 words
A piezo-electric device as defined in claim 5, wherein a ratio (l/w) of the length (l) of the halves of the first and second piezo ceramic elements to the width (w) thereof is 1.5 or more.
Claim 8
Dependent Claim
38 words
A piezo-electric device as defined in claim 5, wherein a ratio (lo/wo) of the total length (lo) of the halves of the first and second piezo ceramic elements to the total width (wo) thereof is 1.7 or less.
Claim 9
Dependent Claim
16 words
A piezo-electric device as defined in claim 1, wherein the device is a piezo bimorph device.
Claim 10
Dependent Claim
32 words
A piezo-electric device as defined in claim 1, wherein at least one of the first and second piezo ceramic elements consists of plural separate segments each of which is rectangular in shape.
Claim 11
Dependent Claim
16 words
A piezo-electric device as defined in claim 1, wherein the device is a piezo unimorph device.
Claim 12
Dependent Claim
95 words
A piezo-electric device comprising: an intermediate plate having opposite surfaces, a plate-like first piezo ceramic element fixed on one of the opposite surfaces of the intermediate plate, a plate-like second piezo ceramic element fixed on the other surface of the intermediate plate, the intermediate plate, the first piezo ceramic element and the second piezo ceramic element being arranged in a sandwich manner, a lead wire for connecting the first piezo ceramic element with the second piezo ceramic element, the intermediate plate being made of a ceramic material having an apparent porosity of 10% or less.
Claim 13
Dependent Claim
95 words
A piezo-electric device comprising: an intermediate plate having opposite surfaces, a plate-like first piezo ceramic element fixed on one of the opposite surfaces of the intermediate plate, a plate-like second piezo ceramic element fixed on the other surface of the intermediate plate, the intermediate plate, the first piezo ceramic element and the second piezo ceramic element being arranged in a sandwich manner, a lead wire for connecting the first piezo ceramic element with the second piezo ceramic element, the intermediate plate being made of a ceramic material having an apparent porosity of 10% or less.
Claim 14
Dependent Claim
20 words
A piezo-electric device as defined in claim 11, wherein the ceramic material has an apparent porosity of 5% or less.
Claim 15
Dependent Claim
18 words
A piezo-electric device as defined in claim 11, wherein the ceramic material is a simple oxide ceramic material.
Claim 16
Dependent Claim
18 words
A piezo-electric device as defined in claim 11, wherein the ceramic material is a composite oxide ceramic material.
Claim 17
Dependent Claim
16 words
A piezo-electric device as defined in claim 11, wherein the ceramic material is non-oxide ceramic material.
Claim 18
Dependent Claim
39 words
A piezo-electric device as defined in claim 11, wherein the first and second piezo ceramic elements each consists of two halves which are separated from each other along a center line of the intermediate plate in its longitudinal direction.
Claim 19
Dependent Claim
36 words
A piezo-electric device as defined in claim 16, wherein a ratio (l/w) of the length (l) of the halves of the first and second piezo ceramic elemenes to the width (w) thereof is 1.5 or more.
Claim 20
Dependent Claim
38 words
A piezo-electric device as defined in claim 16, wherein a ratio (lo/wo) of the total length (lo) of the halves of the first and second piezo ceramic elements to the total width (wo) thereof is 1.7 or less.
Claim 21
Dependent Claim
16 words
A piezo-electric device as defined in claim 16, wherein the device is a piezo bimorph device.
Claim 22
Dependent Claim
32 words
A piezo-electric device as defined in claim 11, wherein at least one of the first and second piezo ceramic elements consists of plural separate segments each of which is rectangular in shape.
Claim 23
Dependent Claim
16 words
A piezo-electric device as defined in claim 11, wherein the device is a piezo unimorph device.
References Cited (Backward Citations)
US2479926A
Cited
US2633543A
Cited
US3084228A
Cited
US3163783A
Cited
US3447217A
Cited
CA970817A
Cited
AT324487B
Cited
US4349762A
Cited
US4443729A
Cited
US4649313A
Cited
DE3518055A1
Cited
US4610426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-28 | 1993-02-27 | 1993-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-28 | 1997-02-27 | 1997-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-28 | 2001-02-27 | 2001-08-29 | $7700.00 | Window Closed / Lapsed |