Patent US3353525A successfully refreshed from Google Patents.
US3353525A
Expired / Lapsed
US
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Fuel feed system and throttle control for internal combustion engines
Assignee: Tillotson Manufacturing Co
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Filing: 1965-09-07
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Granted: 1967-11-21
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Expires: 1985-09-07
Abstract
No abstract record available.
Inventors
- 👤 Warren D Nutten
- 👤 Bernard C Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:32
CPC Classifications
F; F02; F02B; F02B63/00; F02B63/02; F02M; F02M17/00; F02M17/02; F02M17/04; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; Y; Y10; Y10S; Y10S261/00; Y10S261/68
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
A FUEL FEED SYSTEM FOR A TWO CYCLE ENGINE HAVING A CRANKCASE PROVIDED WITH PASSAGE MEANS FOR ADMITTING COMBUSTIBLE MIXTURE INTO THE CRANKCASE DURING RECIPROCATION OF THE ENGINE PISTON INCLUDING, IN COMBUSTION, A CARBURETOR HAVING A FUEL AND AIR MIXING PASSAGE IN REGISTRATION WITH SAID PASSAGE MEANS, SAID CARBURETOR HAVING A FUEL CHAMBER, ORIFICE MEANS OPENING INTO THE MIXING PASSAGE FOR DELIVERING FUEL FROM SAID CHAMBER INTO THE MIXING PASSAGE, A THROTTLE VALVE IN THE MIXING PASSAGE MOVABLE ABOUT AN AXIS PROVIDING DIFFERENTIAL AREAS OF THE VALVE DEFINED BY THE AXIS, AND A BYPASS CHANNEL BETWEEN THE ENGINE CRANKCASE AND THE MIXING PASSAGE WHEREBY FLUID PRESSURES IN THE CRANKCASE ACTING ON THE DIFFERENTIAL AREAS OF THE THROTTLE VALVE INFLUENCE THE RELATIVE POSITION OF THE THROTTLE VALVE.
Claim 2
Dependent Claim
126 words
A FUEL FEED SYSTEM FOR A TWO CYCLE ENGINE HAVING A CRANKCASE PROVIDED WITH PASSAGE MEANS FOR ADMITTING COMBUSTIBLE MIXTURE INTO THE CRANKCASE DURING RECIPROCATION OF THE ENGINE PISTON INCLUDING, IN COMBUSTION, A CARBURETOR HAVING A FUEL AND AIR MIXING PASSAGE IN REGISTRATION WITH SAID PASSAGE MEANS, SAID CARBURETOR HAVING A FUEL CHAMBER, ORIFICE MEANS OPENING INTO THE MIXING PASSAGE FOR DELIVERING FUEL FROM SAID CHAMBER INTO THE MIXING PASSAGE, A THROTTLE VALVE IN THE MIXING PASSAGE MOVABLE ABOUT AN AXIS PROVIDING DIFFERENTIAL AREAS OF THE VALVE DEFINED BY THE AXIS, AND A BYPASS CHANNEL BETWEEN THE ENGINE CRANKCASE AND THE MIXING PASSAGE WHEREBY FLUID PRESSURES IN THE CRANKCASE ACTING ON THE DIFFERENTIAL AREAS OF THE THROTTLE VALVE INFLUENCE THE RELATIVE POSITION OF THE THROTTLE VALVE.
Claim 3
Dependent Claim
148 words
CHARGE FORMING APPARATUS INCLUDING, IN COMBINATION, A BODY PROVIDED WITH A MIXING PASSAGE, A FUEL CHAMBER IN THE BODY, A FUEL INLET IN THE BODY, VALVE MEANS FOR THE FUEL INLET, CONTROL MEANS FOR SAID VALVE MEANS ACTUATED BY REDUCED PRESSURE IN THE MIXING PASSAGE, MAIN AND SECONDARY ORIFICES OPENING INTO THE MIXING PASSAGE FOR DELIVERING FUEL FROM THE FUEL CHAMBER INTO THE MIXING PASSAGE, A THROTTLE VALVE DISC IN SAID MIXING PASSAGE, SAID SECONDARY ORIFICE OPENING INTO THE MIXING PASSAGE AT THE DOWNSTREAM SIDE OF THE THRORRLE VALVE, A SHAFT SUPPORTING THE THROTTLE VALVE DISC, SAID SHAFT HAVING ITS AXIS OFFSET FROM THE LONGITUDINAL AXIS OF THE MIXING PASSAGE, ACTUATING MEANS FOR EFFECTING OPENING AND CLOSING MOVEMENTS OF THE THROTTLE VALVE, AND MEANS LIMITING MOVEMENT OF THE THROTTLE ACTUATING MEANS TOWARD VALVE CLOSING POSITION WHEREBY THE THROTTLE VALVE HAS UNRESTRICTED FREEDOM OF MOVEMENT ADJACENT VALVE CLOSING POSITION.
Claim 4
Dependent Claim
148 words
CHARGE FORMING APPARATUS INCLUDING, IN COMBINATION, A BODY PROVIDED WITH A MIXING PASSAGE, A FUEL CHAMBER IN THE BODY, A FUEL INLET IN THE BODY, VALVE MEANS FOR THE FUEL INLET, CONTROL MEANS FOR SAID VALVE MEANS ACTUATED BY REDUCED PRESSURE IN THE MIXING PASSAGE, MAIN AND SECONDARY ORIFICES OPENING INTO THE MIXING PASSAGE FOR DELIVERING FUEL FROM THE FUEL CHAMBER INTO THE MIXING PASSAGE, A THROTTLE VALVE DISC IN SAID MIXING PASSAGE, SAID SECONDARY ORIFICE OPENING INTO THE MIXING PASSAGE AT THE DOWNSTREAM SIDE OF THE THRORRLE VALVE, A SHAFT SUPPORTING THE THROTTLE VALVE DISC, SAID SHAFT HAVING ITS AXIS OFFSET FROM THE LONGITUDINAL AXIS OF THE MIXING PASSAGE, ACTUATING MEANS FOR EFFECTING OPENING AND CLOSING MOVEMENTS OF THE THROTTLE VALVE, AND MEANS LIMITING MOVEMENT OF THE THROTTLE ACTUATING MEANS TOWARD VALVE CLOSING POSITION WHEREBY THE THROTTLE VALVE HAS UNRESTRICTED FREEDOM OF MOVEMENT ADJACENT VALVE CLOSING POSITION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |