Patent US3230403A successfully refreshed from Google Patents.
US3230403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed ceramic transducer
Assignee: Bendix Corp
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Filing: 1961-07-14
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Granted: 1966-01-18
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Expires: 1981-07-14
Abstract
No abstract record available.
Inventors
- 👤 Howard R Lewis
- 👤 Stephen N Surmeian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:37
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A TRANSDUCER COMPRISING A TUBULAR CERAMIC VIBRATILE ELEMENT HAVING A COMPRESSIVE STRENGTH SEVERAL TIMES ITS TENSILE STRENGTH, A PAIR OF SPACED ELECTRODES ON SAID ELEMENT, A THREADED MEMBER EXTENDING THROUGH THE OPENING IN SAID TUBULAR VIBRATILE ELEMENT AND INCLUDING AN ENLARGED HEAD PORTION FOR APPLYING COMPRESSIVE FORCE TO THE FIRST END OF SAID VIBRATILE ELEMENT AND A PORTION HAVING A NON-CIRCULAR CROSS-SECTION, MEANS ADJACENT TO THE SECOND END OF SAID VIBRATILE ELEMENT HAVING A NON-CIRCULAR INTERNAL SURFACE ENGAGEABLE WITH SAID NON-CIRCULAR PORTION OF SAID THREADED MEMBER TO PREVENT RADIAL MOVEMENT OF SAID MEANS WHILE PERMITTING AXIAL MOVEMENT THEREOF, AND A NUT INCLUDING THREADS ENGAGING SAID THREADED MEMBER FOR APPLYING A COMPRESSIVE FORCE TO SAID LAST NAMED MEANS AND TO SAID VIBRATILE ELEMENT.
Claim 2
Dependent Claim
122 words
A TRANSDUCER COMPRISING A TUBULAR CERAMIC VIBRATILE ELEMENT HAVING A COMPRESSIVE STRENGTH SEVERAL TIMES ITS TENSILE STRENGTH, A PAIR OF SPACED ELECTRODES ON SAID ELEMENT, A THREADED MEMBER EXTENDING THROUGH THE OPENING IN SAID TUBULAR VIBRATILE ELEMENT AND INCLUDING AN ENLARGED HEAD PORTION FOR APPLYING COMPRESSIVE FORCE TO THE FIRST END OF SAID VIBRATILE ELEMENT AND A PORTION HAVING A NON-CIRCULAR CROSS-SECTION, MEANS ADJACENT TO THE SECOND END OF SAID VIBRATILE ELEMENT HAVING A NON-CIRCULAR INTERNAL SURFACE ENGAGEABLE WITH SAID NON-CIRCULAR PORTION OF SAID THREADED MEMBER TO PREVENT RADIAL MOVEMENT OF SAID MEANS WHILE PERMITTING AXIAL MOVEMENT THEREOF, AND A NUT INCLUDING THREADS ENGAGING SAID THREADED MEMBER FOR APPLYING A COMPRESSIVE FORCE TO SAID LAST NAMED MEANS AND TO SAID VIBRATILE ELEMENT.
References Cited (Backward Citations)
US2788454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |