US3836877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric filter
Assignee: Siemens AG
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Filing: 1973-06-27
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Granted: 1974-09-17
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Expires: 1993-06-27
Abstract
Abstract A piezoelectric filter arrangement is provided utilizing a piezoelectric body on which are arranged pairs of input and output electrodes. The electrodes are electrically isolated from one another, and the piezoelectric body is permanently polarized so that the polarization is aligned between these pairs of electrodes.
Inventors
- 👤 M Guntersdorfer
- 👤 H Thomann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:37
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/56; H03H9/562; H03H9/02; H03H9/02228
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
167 words
A filter device comprising A. a piezoelectric body having a first pair of spaced, opposed, generally parallel faces and a second pair of spaced, opposed, generally parallel faces, said second pair being generally normally disposed relative to said first pair, B. a first pair of electrodes, each one on a different one of the faces of said first pair of faces, C. a second pair of electrodes, each one on a different one of the faces of said second pair of faces, said second pair being electrically isolated from said first pair of electrodes, D. said body being permanently polarized between each of said first pair Of electrodes and said second pair of electrodes, respectively, said polarization being exclusively in the direction which is perpendicular to each of said first pair of electrodes in the region between said first pair of electrodes, and exclusively in the direction which is perpendicular to each of said second pair of electrodes in the region between said second pair of electrodes.
Claim 2
Dependent Claim
167 words
A filter device comprising A. a piezoelectric body having a first pair of spaced, opposed, generally parallel faces and a second pair of spaced, opposed, generally parallel faces, said second pair being generally normally disposed relative to said first pair, B. a first pair of electrodes, each one on a different one of the faces of said first pair of faces, C. a second pair of electrodes, each one on a different one of the faces of said second pair of faces, said second pair being electrically isolated from said first pair of electrodes, D. said body being permanently polarized between each of said first pair Of electrodes and said second pair of electrodes, respectively, said polarization being exclusively in the direction which is perpendicular to each of said first pair of electrodes in the region between said first pair of electrodes, and exclusively in the direction which is perpendicular to each of said second pair of electrodes in the region between said second pair of electrodes.
Claim 3
Dependent Claim
12 words
The device of claim 1, wherein said piezoelectric is of rectangular shape.
Claim 4
Dependent Claim
174 words
A filter device comprising A. a piezoelectric body having a first pair of spaced, opposed, generally parallel faces and a second pair of spaced, opposed, generally parallel faces, said second pair being generally normally disposed relative to said first pair, B. a first pair of electrodes, each one on a different one of the faces of said first pair of faces, C. a second pair of electrodes, each one on a different one of the faces of said second pair of faces, said second pair being electrically isolated from said first pair of electrodes, D. said body being permanently polarized between each of said first pair of electrodes and said second pair of electrodes, respectively, said polarization being perpendicular to each of said first pair of electrodes and said second pair of electrodes, wherein one of the four electrodes is divided into two subsidiary electrodes and each of these two subsidiary electrodes are interconnected with one another via a potentiometer, the potentiometer central tapping being one pole of the four poles of the device.
Claim 5
Dependent Claim
174 words
A filter device comprising A. a piezoelectric body having a first pair of spaced, opposed, generally parallel faces and a second pair of spaced, opposed, generally parallel faces, said second pair being generally normally disposed relative to said first pair, B. a first pair of electrodes, each one on a different one of the faces of said first pair of faces, C. a second pair of electrodes, each one on a different one of the faces of said second pair of faces, said second pair being electrically isolated from said first pair of electrodes, D. said body being permanently polarized between each of said first pair of electrodes and said second pair of electrodes, respectively, said polarization being perpendicular to each of said first pair of electrodes and said second pair of electrodes, wherein one of the four electrodes is divided into two subsidiary electrodes and each of these two subsidiary electrodes are interconnected with one another via a potentiometer, the potentiometer central tapping being one pole of the four poles of the device.
Claim 6
Dependent Claim
123 words
A filter device comprising A. a piezoelectric body having a pair of spaced, opposed generally parallel faces, B. a first pair of electrodes, on one of the faces of said pair of faces, each one comprising a plurality of interlaced spaced parallel finger-like members, the ends of which at one common end are joined together by a single trunk electrode, C. a second pair of electrodes, on a different one of said pair of faces, each one comprising a plurality of interlaced spaced parallel finger-like members, the ends of which at one common end are joined together by a single trunk electrode, D. said body being permanently polarized between each of said first pair of electrodes and said second pair of electrodes, respectively.
Claim 7
Dependent Claim
123 words
A filter device comprising A. a piezoelectric body having a pair of spaced, opposed generally parallel faces, B. a first pair of electrodes, on one of the faces of said pair of faces, each one comprising a plurality of interlaced spaced parallel finger-like members, the ends of which at one common end are joined together by a single trunk electrode, C. a second pair of electrodes, on a different one of said pair of faces, each one comprising a plurality of interlaced spaced parallel finger-like members, the ends of which at one common end are joined together by a single trunk electrode, D. said body being permanently polarized between each of said first pair of electrodes and said second pair of electrodes, respectively.
Claim 8
Dependent Claim
12 words
The device of claim 4, wherein said piezoelectric is of rectangular shape.
Claim 9
Dependent Claim
46 words
The device of claim 4, wherein one of the four electrodes is divided into two subsidiary electrodes and each of these two subsidiary electrodes are interconnected with one another via a potentiometer, the potentiometer central tapping being one pole of the four poles of the device.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |