US4626729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroacoustic piezoelectric transducers
Assignee: Individual
•
Filing: 1985-04-30
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Granted: 1986-12-02
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Expires: 2005-04-30
Abstract
Abstract The invention relates to an electroacoustic piezoelectric transducer comprising a mechanically stretched vibrating membrane composed of a polymer sheet (10) jointly interposed between two metallic electrodes (9 and 11), one of them (11) being constituted by metallization of one of the faces of the polymer sheet (10). The other electrode (9) is constituted by an autonomous metallic sheet offering a high resistance to mechanical tension, adhering intimately against the other face of the polymer sheet.
Inventors
- 👤 Jacques Lewiner
- 👤 Claude Hennion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:12
CPC Classifications
H; H04; H04R; H04R19/00; H04R19/01; H04R31/00; H04R31/003; H04R7/00; H04R7/02; H04R7/04; H04R7/06; H04R7/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
An electroacoustic piezoelectric transducer including a mechanically stretched vibrating membrane composed of a piezoelectric polymer sheet interposed between two metallic electrodes, one of said electrodes being constituted by metallization of one of the faces of the polymer sheet, and the other said electrode being constituted by an autonomous metallic sheet of high resistance to mechanical tension applied in a direction in or parallel to the plane of the metallic sheet, and in intimate adherence to the other face of said polymer sheet, the mechanical tension applied to the composite membrane being essentially withstood by said autonomous metallic sheet.
Claim 2
Dependent Claim
98 words
An electroacoustic piezoelectric transducer including a mechanically stretched vibrating membrane composed of a piezoelectric polymer sheet interposed between two metallic electrodes, one of said electrodes being constituted by metallization of one of the faces of the polymer sheet, and the other said electrode being constituted by an autonomous metallic sheet of high resistance to mechanical tension applied in a direction in or parallel to the plane of the metallic sheet, and in intimate adherence to the other face of said polymer sheet, the mechanical tension applied to the composite membrane being essentially withstood by said autonomous metallic sheet.
Claim 3
Dependent Claim
22 words
A transducer as claimed in claim 1 wherein the mechanical tension applied to the composite membrane comprises between 100 and 1,000 Nm.
References Cited (Backward Citations)
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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) | 1989-12-01 | 1990-06-02 | 1990-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-01 | 1994-06-02 | 1994-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-01 | 1998-06-02 | 1998-12-02 | $7700.00 | Window Closed / Lapsed |