Patent US4374377A successfully refreshed from Google Patents.
US4374377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric audio transducer
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1980-12-10
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Granted: 1983-02-15
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Expires: 2000-12-10
Abstract
Abstract A piezoelectric audio transducer adapted to produce a sound output when a vibrator which is formed by bonding a piezoelectric element to a metallic diaphragm is electrified, wherein the audio transducer is formed by securely supporting the outer periphery of the vibrator on an acoustic casing, and a fixing part to be fixed to a mounting body is provided on the audio transducer and is connected to the casing with an elastic body interposed therebetween so as to thereby enable the casing which is fixed to the mounting body to vibrate integrally with the vibrator when said vibrator is vibrated.
Inventors
- 👤 Nobuyuki Saito
- 👤 Hiroshi Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:51
CPC Classifications
G; G10; G10K; G10K9/00; G10K9/18; G10K9/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
A three-terminal audio transducer, wherein the outer periphery of a vibrator, which comprises a piezoelectric element placed on a metallic diaphragm, is securely supported on an acoustic casing, and wherein an elastic part is arranged between said casing and a fixing part of said audio transducer so as to be fixed to a mounting body, and wherein said elastic part has sufficient elasticity to enable said vibrator and casing and elastic part to vibrate in a well balanced fashion.
Claim 2
Dependent Claim
79 words
A three-terminal audio transducer, wherein the outer periphery of a vibrator, which comprises a piezoelectric element placed on a metallic diaphragm, is securely supported on an acoustic casing, and wherein an elastic part is arranged between said casing and a fixing part of said audio transducer so as to be fixed to a mounting body, and wherein said elastic part has sufficient elasticity to enable said vibrator and casing and elastic part to vibrate in a well balanced fashion.
Claim 3
Dependent Claim
32 words
A three-terminal audio transducer as defined in claim 1, wherein said elastic part comprises a thin elastic plate which is integral with said casing and wherein said casing comprises a plastic material.
Claim 4
Dependent Claim
28 words
A three-terminal aduio transducer as defined in claim 1, wherein said elastic part comprises a plurality of electroconductive terminals for fixing said audio transducer to said mounting body.
Claim 5
Dependent Claim
62 words
A three-terminal audio transducer as defined in claim 3, wherein said plurality of electroconductive terminals comprise three electroconductive terminals which are fixed to said casing, two of said three electroconductive terminals being used for both supplying electrical power to said transducer and for mechanical support and the third of said three electroconductive terminals being used for both electrical feedback and mechanical support.
Claim 6
Dependent Claim
60 words
A three-terminal audio transducer as defined in claim 1, wherein said elastic part comprises three electroconductive terminals which are fixed to said casing, two of said three electroconductive terminals being used for both supplying electrical power to said transducer and for mechanical support and the third of said three electroconductive terminals being used for both electrical feedback and mechanical support.
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) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |