Patent US3667739A successfully refreshed from Google Patents.
US3667739A
Expired / Lapsed
US
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Process and apparatus regulating the fuel-air mixture in internal combustion engines operating with carburetors
Assignee: Eltro GmbH and Co
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Filing: 1969-12-09
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Granted: 1972-06-06
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Expires: 1989-12-09
Abstract
Abstract A PROCESS AND APPARATUS FOR REGULATING A FUEL-AIR MIXTURE FOR INTERNAL COMBUSTION ENGINES COMPRISES A PLURALITY OF TELESCOPED TUBES DEFINING VENTURI PASSAGES FOR DISCHARGING AIR AT CONSTANT VELOCITY IN THE REGION OF A VARIABLE FUEL INLET. THE INLET AND AIR PASSAGES ARE CONJOINTLY REGULATED TO BE CORRESPONDINGLY VARIED IN SIZE TO CHANGE ENGINE OPERATION. THE SIZE OF THE FUEL INLET IS ADDITIONALLY AND INDEPENDENTLY REGULATED, IN SUPERPOSITION WITH THE ABOVE REGULATION, IN RESPONSE TO TEMPERATURE AND PRESSURE CHANGES DURING VARIATION OF ENGINE OPERATING CONDITIONS.
Inventors
- 👤 Franz Menke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:32
CPC Classifications
F; F02; F02M; F02M7/00; F02M7/12; F02M1/00; F02M1/08; F02M1/10; F02M9/00; F02M9/12; F02M9/127; Y; Y10; Y10S; Y10S261/00; Y10S261/38; Y10S261/63
Claims Analysis
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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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |