US3588381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer having spaced apart oppositely flexing piezoelectric members
Assignee: Motorola Solutions Inc
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Filing: 1967-08-28
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Granted: 1971-06-28
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Expires: 1987-08-28
Abstract
Abstract AN ELECTROACOUSTIC TRANSDUCER HAVING PIEZOELECTRIC DRIVING MEANS CONSISTING OF FIRST AND SECOND SPACED APART BIMORPHS HAVING A CENTRAL PORTION AND AN EDGE PORTION. A SPACER COUPLES THE SAME PORTION OF EACH BIMORPH TOGETHER. THE OTHER PORTION OF EACH BIMORPH IS COUPLED RESPECTIVELY TO SUPPORT MEANS AND A DIAPHRAGM. THE BMORPHS ARE ELECTRICALLY INTERCONNECTED SO THAT THEY FLEX IN OPPOSITE DIRECTIONS. A FURTHER EMBODIMENT INCLUDES THIRD AND FOURTH SPACED APART BIMORPHS OPERATING SIMILAR TO AND DIRECTLY ATTACHED TO THE FIRST AND SECOND BIMORPHS.
Inventors
- 👤 Hugo W Schafft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:20
CPC Classifications
H; H04; H04R; H04R17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |