Patent US4314539A successfully refreshed from Google Patents.
US4314539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel line pressure equalizer for internal combustion engine
Assignee: Individual
•
Filing: 1980-04-30
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Granted: 1982-02-09
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Expires: 2000-04-30
Abstract
Abstract A check valve equipped air vent and fuel pump by-pass member is disposed interconnecting the fuel supply tank of an internal combustion engine with the output of the fuel pump to equalize the pressure of fuel delivered to the carburetor throughout the range of engine speeds.
Inventors
- 👤 Maynard W. Schade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:26
CPC Classifications
F; F02; F02M; F02M37/00; F02M37/0011; F02M37/0041; F02B; F02B75/00; F02B75/34; F02M37/04; F02M37/046; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
Pressure regulating and venting apparatus for an internal combustion engine fuel system comprising an enclosed chamber communicated by an input passage disposed to received delivery of fuel from a fuel pump, and further communicated by a fuel outflow passage disposed to deliver fuel to a carburetor, and further communicated by a fuel return passage disposed to provide for flow of fluid to a fuel supply source, said chamber being further provided with an atmospheric vent equipped with a check valve to enable air to enter said chamber to maintain at least atmospheric pressure therein, said apparatus effecting near constant fuel pressure at said output passage.
Claim 2
Dependent Claim
105 words
Pressure regulating and venting apparatus for an internal combustion engine fuel system comprising an enclosed chamber communicated by an input passage disposed to received delivery of fuel from a fuel pump, and further communicated by a fuel outflow passage disposed to deliver fuel to a carburetor, and further communicated by a fuel return passage disposed to provide for flow of fluid to a fuel supply source, said chamber being further provided with an atmospheric vent equipped with a check valve to enable air to enter said chamber to maintain at least atmospheric pressure therein, said apparatus effecting near constant fuel pressure at said output passage.
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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) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |