US4257379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carburetor
Assignee: JOHN NELSON CORP
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Filing: 1979-06-28
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Granted: 1981-03-24
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Expires: 1999-06-28
Abstract
Abstract A carburetor with a pressurized fuel source is provided. The carburetor has an upright passage extending therethrough with an intermediate fuel-supply portion in which is located a fuel injection tube having a plurality of orifices extending therealong through which fuel is directed under pressure into the passage. An air-control slide valve is mounted for movement across the passage between an open and a closed position and has a closure member or plug which regulates the number of orifices of the injection tube through which the fuel is supplied. The closure member is connected to the accelerator pedal in a manner such that the member opens at least one additional orifice during acceleration before the air-control slide valve opens more, to provide additional fuel during acceleration. Also, during deceleration, the closure member closes at least one additional orifice before the slide valve moves toward the closed position. The carburetor also has a vapor receptacle through which fuel is supplied before being supplied to the injection tube. The receptacle has a return line connected to the fuel tank so that if fuel tends to vaporize in the receptacle, the vapors are fed back to the tank to prevent vapor lock.
Inventors
- 👤 Nelson F. Hickling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:45
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/16; F02M69/18; F02M69/24; F02M69/44; F02M9/00; F02M9/02; F02M9/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
321 words
Fuel control means for supplying an air-fuel mixture to an internal combustion engine, said control means comprising a body, said body forming an upright main passage extending therethrough and having an upper air intake portion, a lower air-fuel mixing portion, and an intermediate fuel-supply portion, a slide valve mounted for movement across said intermediate portion of said passage and movable between a position substantially closing said intermediate portion and a position substantially fully opening said intermediate portion, said slide valve having a bore centrally located therein parallel to the direction of movement of said slide valve, an injection tube carried by said body and extending across said intermediate portion of said passage in axial alignment with said slide valve bore, said injection tube having orifices extending along a substantial portion of the length thereof and transversely to the longitudinal extent of said passage, a vapor receptacle formed in said carburetor body, fuel supply means connecting a lower portion of said vapor receptacle with the interior of said injection tube, means for supplying fuel under pressure to said vapor receptacle, a vapor return line for connecting an upper portion of said receptacle to a fuel supply tank, a closure member carried by said slide valve in said bore, said injection tube having an inner diameter fitting closely with outer diameter of said closure member, said closure member being effective to close said orifices as said valve moves toward the closed position and being effective to open said orifices as said valve moves toward the open position, means for connecting said closure member to an accelerator pedal for causing movement of said closure member, and lost-motion means connecting said connecting means to said slide valve, whereby said closure member can move toward the open position before said slide valve moves toward the open position and said closure member can move toward the closed position before said slide valve moves toward the closed position.
Claim 2
Dependent Claim
321 words
Fuel control means for supplying an air-fuel mixture to an internal combustion engine, said control means comprising a body, said body forming an upright main passage extending therethrough and having an upper air intake portion, a lower air-fuel mixing portion, and an intermediate fuel-supply portion, a slide valve mounted for movement across said intermediate portion of said passage and movable between a position substantially closing said intermediate portion and a position substantially fully opening said intermediate portion, said slide valve having a bore centrally located therein parallel to the direction of movement of said slide valve, an injection tube carried by said body and extending across said intermediate portion of said passage in axial alignment with said slide valve bore, said injection tube having orifices extending along a substantial portion of the length thereof and transversely to the longitudinal extent of said passage, a vapor receptacle formed in said carburetor body, fuel supply means connecting a lower portion of said vapor receptacle with the interior of said injection tube, means for supplying fuel under pressure to said vapor receptacle, a vapor return line for connecting an upper portion of said receptacle to a fuel supply tank, a closure member carried by said slide valve in said bore, said injection tube having an inner diameter fitting closely with outer diameter of said closure member, said closure member being effective to close said orifices as said valve moves toward the closed position and being effective to open said orifices as said valve moves toward the open position, means for connecting said closure member to an accelerator pedal for causing movement of said closure member, and lost-motion means connecting said connecting means to said slide valve, whereby said closure member can move toward the open position before said slide valve moves toward the open position and said closure member can move toward the closed position before said slide valve moves toward the closed position.
Claim 3
Dependent Claim
34 words
Fuel control means according to claim 1 characterized by said fuel supply means comprising a fuel pressure regulator carried by said carburetor body, said regulator communicating with a lower portion of said vapor receptacle.
Claim 4
Dependent Claim
32 words
Fuel control means according to claim 1 wherein said lost-motion means causes said closure member to open and close one orifice before said slide valve moves toward the open and closed positions.
Claim 5
Dependent Claim
51 words
Fuel control means according to claim 1 characterized by said connecting means extending through a passage in said slide valve and said lost-motion means comprising two enlargements on said connecting means to contact said slide valve, said enlargements being spaced apart a distance exceeding the length of said slide valve passage.
Claim 6
Dependent Claim
40 words
Fuel control means according to claim 4 characterized by the spacing of said enlargements exceeding the length of said slide valve passage by a distance that is at least equal to the spacing of said orifices along said injection tube.
Claim 7
Dependent Claim
55 words
Fuel control means according to claim 1 characterized by said orifices being positioned in two rows along side injection tube and staggered with respect to one another, said lost-motion means enabling said closure member to move a distance at least one-half the space between the orifices in each row prior to said slide valve moving.
Claim 8
Dependent Claim
280 words
Fuel control means for supplying an air-fuel mixture to an internal combustion engine, said control means comprising a body, said body forming an upright main passage extending therethrough and having an upper air intake portion, a lower air-fuel mixing portion, and an intermediate fuel-supply portion, a slide valve mounted in said body for movement across said intermediate portion of said passage and movable between a position substantially closing said intermediate portion and a position substantially fully opening said intermediate portion, said slide valve having a bore centrally located therein parallel to the direction of movement of said slide valve, a closure member carried by said slide valve in said bore, an injection tube carried by said body and extending across said intermediate portion of said passage in axial alignment with said slide valve bore and having an inner diameter fitting closely with the outer diameter of said closure member, said tube having orifices extending along a substantial portion of the length thereof and transversely to the longitudinal extent of said passage, said closure member being effective to close said orifices as said valve moves toward the closed position and being effective to open said orifices as said valve moves toward the open position, means for connecting said closure member to an accelerator pedal for causing movement of said closure member, and lost-motion means connecting said connecting means to said slide valve, whereby said closure member can move toward the open position before said slide valve moves toward the open position and said closure member can move toward the closed position before said slide valve moves toward the closed position, and means for supplying fuel under pressure to said injection tube.
Claim 9
Dependent Claim
280 words
Fuel control means for supplying an air-fuel mixture to an internal combustion engine, said control means comprising a body, said body forming an upright main passage extending therethrough and having an upper air intake portion, a lower air-fuel mixing portion, and an intermediate fuel-supply portion, a slide valve mounted in said body for movement across said intermediate portion of said passage and movable between a position substantially closing said intermediate portion and a position substantially fully opening said intermediate portion, said slide valve having a bore centrally located therein parallel to the direction of movement of said slide valve, a closure member carried by said slide valve in said bore, an injection tube carried by said body and extending across said intermediate portion of said passage in axial alignment with said slide valve bore and having an inner diameter fitting closely with the outer diameter of said closure member, said tube having orifices extending along a substantial portion of the length thereof and transversely to the longitudinal extent of said passage, said closure member being effective to close said orifices as said valve moves toward the closed position and being effective to open said orifices as said valve moves toward the open position, means for connecting said closure member to an accelerator pedal for causing movement of said closure member, and lost-motion means connecting said connecting means to said slide valve, whereby said closure member can move toward the open position before said slide valve moves toward the open position and said closure member can move toward the closed position before said slide valve moves toward the closed position, and means for supplying fuel under pressure to said injection tube.
Claim 10
Dependent Claim
68 words
Fuel control means according to claim 7 characterized by said last-named means including first fuel supply passage means in said body, a pressure regulator carried by said body and communicating with said fuel supply passage means, a vapor receptacle located in said body, second fuel supply passage means connecting said pressure regulator with said vapor receptacle, and additional passage means connecting said vapor receptacle with said injection tube.
Claim 11
Dependent Claim
56 words
Fuel control means according to claim 8 characterized by said second fuel supply passage means communicating with an upper portion of said vapor receptacle, said additional passage means communicating with a lower portion of said vapor receptacle, and a vapor return line for connecting an upper portion of said vapor receptacle with a fuel supply tank.
Claim 12
Dependent Claim
64 words
Fuel control means according to claim 8 characterized by second additional fuel supply passage means communicating with said additional fuel supply passage means and with said air-fuel mixing portion of said passage below said slide valve, and an adjustable valve communicating with said second additional supply passage means for adjustably controlling the flow of fuel therethrough to said air-fuel mixing portion of said passage.
Claim 13
Dependent Claim
32 words
Fuel control means according to claim 7 wherein said lost-motion means causes said closure member to open and close one orifice before said slide valve moves toward the open and closed positions.
Claim 14
Dependent Claim
51 words
Fuel control means according to claim 7 characterized by said connecting means extending through a passage in said slide valve and said lost-motion means comprising two enlargements on said connecting means to contact said slide valve, said enlargements being spaced apart a distance exceeding the length of said slide valve passage.
Claim 15
Dependent Claim
40 words
Fuel control means according to claim 12 characterized by the spacing of said enlargements exceeding the length of said slide valve passage by a distance that is at least equal to the spacing of said orifices along said injection tube.
Claim 16
Dependent Claim
55 words
Fuel control means according to claim 7 characterized by said orifices being positioned in two rows along said injection tube and staggered with respect to one another, said lost-motion means enabling said closure member to move a distance at least one-half the space between the orifices in each row prior to said slide valve moving.
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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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |