US3562748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic air horn
Assignee: Prestolite Electric Inc
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Filing: 1968-09-18
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Granted: 1971-02-09
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Expires: 1988-09-18
Abstract
Abstract AN ELECTRIC AIR HORN, HAVING A RESONATING CHAMBER, IS FORMED OF TWO MOLDED THERMOPLASTIC RESIN BODY PORTIONS PERMANENTLY JOINED TOGETHER IN A PLANE BY HEAT. THE RESONATING CHAMBER IS CONNECTED TO A COLLAPSING AIR CHAMBER FORMED BY A VIBRATORY DIAPHRAGM COOPERATING WITH ONE SIDE OF THE RESIN PORTIONS, THE DIAPHRAGM BEING VIBRATED BY AN ELECTRIC MOTOR. THE DIAPHRAGM AND THE MOTOR BASE MEMBER ARE PERMANENTLY JOINED TOGETHER UNDER PREDETERMINED TENSION IN A PERIPHERAL AREA BY A FLANGE PORTION OF THE RESIN BODY CREATED BY A THERMOPLASTIC REFORM OF THE FLANGE.
Inventors
- 👤 William C Wetzel
- 👤 Raymond W Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:28
CPC Classifications
G; G10; G10K; G10K9/00; G10K9/18
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |