US3676047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas control valve means having a piezoelectric firing unit
Assignee: Rinnai Corp
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Filing: 1971-03-31
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Granted: 1972-07-11
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Expires: 1991-03-31
Abstract
Abstract A GAS CONTROL VALVE APPARATUS COMPRISES A VALVE UNIT OPERATED BY A ROTATABLE SHAFT TO FIRST OPEN A PILOT GAS PASSAGE AFTER WHICH ROTATION IS AUTOMATICALLY STOPPED AND AT THIS TIME, A COCKED HAMMER IS RELEASED TO STRIKE A PIEZOELECTRIC FIRING UNIT AND EFFECT A SPARK DISCHARGE TO IGNITE THE PILOT BURNER. THE STOP OF THE ROTATION OF THE SHAFT IS RELEASED AUTOMATICALLY BY REMOVAL OF THE ACTUATING TORQUE ON THE SHAFT WHEREBY THE SHAFT CAN BE FURTHER ROTATED TO BRING THE VALVE UNIT TO A POSITION IN WHICH A GAS PASSAGE FOR THE MAIN BURNER IS FULLY OPENED.
Inventors
- 👤 Shinichi Soma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:00
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/10; F24C3/103; F23; F23Q; F23Q3/00; F23Q3/002; Y; Y10; Y10T; Y10T137/00; Y10T137/1407; Y10T137/1516
Claims Analysis
Total Claims: 0
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |