US4027639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isothermal fuel supply system
Assignee: Toyota Motor Corp
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Filing: 1975-06-23
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Granted: 1977-06-07
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Expires: 1995-06-23
Abstract
Abstract A fuel supply system which preheats fuel to be supplied to a carburetor or a fuel injection device up to a constant temperature regardless of variations in engine operating condition, wherein a part of a fuel supply tube which extends from a fuel pump to the carburetor or the fuel injection device is put into contact with engine cooling water in a heat exchanging manner.
Inventors
- 👤 Masuo Amano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:38
CPC Classifications
F; F02; F02M; F02M31/00; F02M31/02; F02M31/16; F02M31/04; F02M31/10; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
In an internal combustion engine which includes an isothermal fuel supply system which incorporates the engine's cooling water circulating system including the engine's radiator which contains a bottom tank portion located at its exit portion, said system further including a fuel pump, a fuel supply tube, and a carburetor or fuel injection device, said fuel supply tube extending from the fuel pump to the carburetor or the fuel injection device, the improvement which comprises providing a substantial length of said fuel supply tube to extend through said bottom tank portion of the radiator in direct heat exchange contact with the cooling water in said tank portion.
Claim 2
Dependent Claim
106 words
In an internal combustion engine which includes an isothermal fuel supply system which incorporates the engine's cooling water circulating system including the engine's radiator which contains a bottom tank portion located at its exit portion, said system further including a fuel pump, a fuel supply tube, and a carburetor or fuel injection device, said fuel supply tube extending from the fuel pump to the carburetor or the fuel injection device, the improvement which comprises providing a substantial length of said fuel supply tube to extend through said bottom tank portion of the radiator in direct heat exchange contact with the cooling water in said tank portion.
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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) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |