US3273868A - Carburetor for internal combustion engines - Google Patents

Carburetor for internal combustion engines Download PDF

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US3273868A
US3273868A US396532A US39653264A US3273868A US 3273868 A US3273868 A US 3273868A US 396532 A US396532 A US 396532A US 39653264 A US39653264 A US 39653264A US 3273868 A US3273868 A US 3273868A
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carburetor
housing
needle valve
skirt
bowl
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US396532A
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Glenn R Morton
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M9/00—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position
    • F02M9/12—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position having other specific means for controlling the passage, or for varying cross-sectional area, of fuel-air mixing chambers
    • F02M9/127—Axially movable throttle valves concentric with the axis of the mixture passage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/08—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically
    • F02M1/10—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically dependent on engine temperature, e.g. having thermostat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M5/00—Float-controlled apparatus for maintaining a constant fuel level
    • F02M5/12—Other details, e.g. floats, valves, setting devices or tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/12—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves
    • F02M7/14—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel spray nozzle
    • F02M7/16—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel spray nozzle operated automatically, e.g. dependent on exhaust-gas analysis
    • F02M7/17—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel spray nozzle operated automatically, e.g. dependent on exhaust-gas analysis by a pneumatically adjustable piston-like element, e.g. constant depression carburettors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/12—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves
    • F02M7/18—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel-metering orifice
    • F02M7/20—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel-metering orifice operated automatically, e.g. dependent on altitude

Definitions

  • This invention relates to carburetors for internal combustion engines and more particularly to a carburetor that has its needle valve means adjustably actuated by the varying atmospheric pressure relative to the minus atmospheric pressure inside the engine intake manifold.
  • One object of this invention is to provide a carburetor having an adjustable fixed needle valve with a vertically movable bowl.
  • a still further object of my invention is to provide a carburetor having a needle valve that is capable of limited floating action for power enrichment.
  • a still further object of my invention is to provide a carburetor with a needle valve adjustably responsible to a temperature sensitive bimetal unit for fuel enrichment during cold starts.
  • a still further object of my invention is to provide a carburetor that has its metering orifices below the fuel surface level of the carburetor bowl.
  • a still further object of my invention is to provide a carburetor having a passageway communicating with the engine intake manifold back of the butterfly control valve for the removal of any free fuel dropping incidently deposited in the bottom area of the unit.
  • a further object of this invention is to provide a carburetor that will balance its throttle position with the outside atmosphere as the engine manifold pressure changes.
  • a still further object of this invention is to provide a carburetor that will automatically enrich the mixture of gasoline at critical engine stages of operation that require such additional fuel.
  • a still further object of this invention is to provide a carburetor that provides rapid engine acceleration.
  • a still further object of this invention is to provide a carburetor that idles perfectly.
  • a still further object of this invention is to provide a carburetor that is so efiicient under all conditions that the pollution of the air from the engines exhaust is greatly reduced.
  • a still further object of my invention is to provide a carburetor that once adjusted for a given internal combustion engine will be substantially self adjusting for varying atmospheric conditions and varying temperature conditions.
  • a still further object of my invention is to provide a high efliciency carburetor that successfully mixes the fuel and air prior to their entry into the combustion chambers of the internal combustion engine.
  • Still further objects of my invention are to provide a carburetor for internal combustion engines that is economical in manufacture and durable in use.
  • FIG. 1 is a perspective view of my carburetor
  • FIG. 2 is an enlarged cross-sectional view of my carburetor
  • FIG. 3 is a perspective plan view of the fuel distribution spool with sections cut away to more fully illustrate its construction
  • FIG. 4 is an enlarged perspective view of the float control lever
  • F IG. 5 is a plan view of the temperature sensitivity bimetal adjusting means for the carburetor needle valve taken in line 55 of FIG. 2.
  • the numeral generally designates the lower portion of the carburetor housing having a circular opening 11 in its top, an interior area 12 and an area 13 adapted to be in communication with the intake manifold of an internal combustion engine.
  • the numeral 15 designates the usual butterfly valve adapted to be secured to the accelerator lever of the engine. This butterfly valve separates the areas 12 and 13.
  • the inside cylindrical area of the member 17 is designated by the numeral 19.
  • Imposed in the inverted bottom of the member 17 is a cylinder element 20 having a reduced downwardly extending circular wall 21 at its lower area. Imposed in this reduced circular wall is a fixed tube unit 22.
  • a spool unit 23 having an upper skirt portion 25 vertically movable in the inverted cup 17 and a lower skirt portion 26 vertically movable within the upper portion of the area as shown in FIG. 2.
  • the skirt 26 has an upper outer projecting circular lip 27. Fixed to the under periphery of the skirt 27 is an upwardly extending lip 29 creating with the lip 27, an open circular channel 30.
  • the central area of the spool has a hollow area 31.
  • the numeral 32 designates radially extending passageways in the lower skirt communicating with the area 31 and the circular channel 30. Extending upwardly from the bottom of the area 12 is collar 33.
  • the numeral 35 designates a centrally located downwardly extending tube on the bottom of the skirt 26 and which has its inside top communicating with the area 31.
  • the numeral 36 designates the carburetor bowl secured to the under side of the skirt 26 by a nut 37 threaded into the lower end of the tube 35. Extending through the wall of the lower end portion of the tube 35 are passageways 39 connecting the inside bottom area of the bowl 36 with the inside of the tube 35. Directly above the passageways 39 and inside the tube 35 is the needle valve seat 40.
  • the numeral 41 designates the carburetor bowl float.
  • the numeral 42 designates a valve fixture extending through the skirt 36. This fixture has a slidable valve stem 43 in its passageway and which is engaged by a hinged lever 45.
  • This hinged lever 45 rides on the float 40. When the float drops, the lever arm will drop and the valve stem 43 moves to a lowered open condition. When the float is elevated by sufficient fuel in the bowl, the lever 45 is thereby raised, and the valve stem is thereby elevated to close the valve means fixture and prevent further liquid fuel entering the carburetor bowl. Thus a suitable level of fuel will automatically be maintained in the carburetor bowl. Inasmuch as the spool 23 and carburetor bowl reciprocate upwardly and downwardly, the fuel supply conduit 46 is flexible. This conduit 46 is adapted to be in communication with a source of liquid fuel.
  • the numeral 47 designates a coil spring under the carburetor bowl for yieldingly holding the carburetor bowl and spool 23 in an upward position of their sliding movement. If liquid fuel settles in the bottom of the housing 10, it passes through passageways 49 in the lower area of the collar 33, and is suction drawn from the in side bottom area surrounded by the collar 33 by the passageway 50 that communicates with this area and the area back of the butterfly valve 15.
  • the needle valve unit consists of a needle valve 52, a head 53 at the top of the needle and a tube 55 extending downwardly from the head and embracing the upper portion of the needle as shown in FIG. 2.
  • the numeral 56 designates a coil spring embracing the tube 55, having one end engaging the underside of the head 53 and its other end engaging the cylinder 51, for yieldingly holding the needle valve in an upward position.
  • the tapered lower end portion of the needle valve extends through the needle valve seat 40.
  • a sealing ring 57 is between the cylinder 51 and the tube 22.
  • a piston 59 Slidably mounted in the upper enlarged area of the cylinder element is a piston 59 having a peripheral compression ring 60.
  • Threaded in the piston 59 is a nut 61. Threaded through the nut 61 and capable of being engaged by the head 53 is a hollow tubular member 62.
  • the numeral 63 designates a tubular bracket on the top of the piston 59.
  • the numeral 65 designates a coiled heat sensitive bi-metal spring having one end secured to the bracket 63 and its other end secured to the fitting 64 threaded into the tubular member 62 as shown in FIG. 5.
  • the numeral 66 designates a pin on the needle head and extending upwardly in the member 64.
  • the numeral 6'7 designates an adjusting screw threaded into the upper end of the member 6 and capable of engaging the top of the pin 66.
  • the upper skirt has its periphery flexibly connected to the top 17 by a rubber or like flexible ring 69, thereby creating a variable area 70 above the spool 23.
  • the numeral 71 designates a passageway having one end communicating with the outside atmosphere and its other end communicating with the area 70.
  • the numeral 72 designates an adjustable valve means imposed in the passageway 71.
  • the numeral 73 designates a passageway having one end communicating with the area back of the butterfly valve 15 and its other end communicating with the enclosed area below the piston 59. Any engine back firing is relieved by a spring loaded valve 75 communicating with the engine intake back of the butterfly valve 15.
  • the large areas forward of and to the rear of the butterfly valve 15 provide large fuel and air mixing chambers, thereby giving great efliciency and much less outside air pollution from the engine using my carburetor.
  • the needle valve is of a floating type having three control adjustments, two of which are automatic.
  • the spring 56 yieldingly holds the needle valve in an upward position of its vertical sliding movement.
  • the upperward limit of the movement of the needle valve relative to the core 62 and piston 59 is adjustably obtained by the screw 67 as shown in FIG. 2 and is of manual adjustment.
  • the piston 59 is actuated automatically because its bottom side is affected by engine suction through the conduit 73.
  • the piston 59 will be drawn downwardly thereby lowering the needle valve relative to the needle valve seat 40.
  • the suction below the piston 59 will decrease, the needle valve spring will raise the needle and piston 59 and the needle valve will be in upper float condition thereby giving power enrichment.
  • the second automatic needle valve control is the coiled heat sensative bi-metal band 65. When the coiled band 65 is cold it Will contract, thereby screwing the core 65, upwardly and permitting the needle to raise for the enrichment of the combustible engine fuel for cold engine starts.
  • the needle valve spring be adjusted to a load of approximately seven inches of vacuum to obtain power enrichment.
  • the spring 47 should have a load of approximately one inch of vacuum and the spring loaded valve be approximately loaded for one inch of vacuum.
  • a vertically slidable spool having a lower skirt secured to said carburetor bowl and an upper skirt vertically slidable in said upper housing
  • valve having one side communicating with the inside of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combustion engine
  • valve adjustable passageway having one end communicating with the outside atmosphere and its other end communicating with the inside of said upper housing above the upper skirt of said spool.
  • a vertically slidable spool having a lower skirt secured to said carburetor 'bowl and an upper skirt vertically slidable in said upper housing
  • valve having one side communicating with the inside of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combustion engine
  • valve adjustable passageway having one end communicating with the outside atmosphere and its other end communicating with the inside of said upper housing above the upper skirt of said spool.
  • a vertically slidable spool having a lower skirt secured to said carburetor bowl and an upper skirt vertically slidable in said upper housing
  • adjustable means for holding said needle valve at least in one direction
  • valve having one side communicating with the inside of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combustion engine
  • valve adjustable passageway having one end communicating with the outside atmosphere and its other end communicating with the inside of said upper housing above the upper skirt of said spool.
  • a vertically slidable spool having a lower skirt secured to said carburetor bowl and an upper skirt vertically slidable in said upper housing
  • valve having one side communicating with the inside of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combusion engine
  • valve adjustable passageway having one end communicating with the outside atmosphere and its other end communicating with the inside of said upper housing above the upper skirt of said spool,
  • valve means communicating with the outside atmosphere and that side of said valve that is adapted to be in communication with the intake manifold of an internal combustion engine.
  • a vertically slidable spool having a lower skirt secured to said carburetor bowl and an upper skirt vertically slidable in said upper housing
  • valve having one side communicating with the inside of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combustion engine
  • valve adjustable passageway having one end communicating with the outside atmosphere and its other end communicating with the inside of said upper housing above the uppr skirt of said. spool,
  • a vertically slidable spool having a lower skirt secured to said carburetor bowl and an upper skirt vertically slidable in said upper housing
  • heat controlled means for holding said needle valve at least in one direction
  • valve having one side communicating with the inside of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combustion engine
  • valve adjustable passageway having one end communicating with the outside atmosphere and its other end communicating with the inside of said upper housing above the upper skirt of said spool.
  • a vertically sl-idable spool having a lower skirt secured to said carburetor bowl and an upper skirt vertically slidable in said upper housing,
  • valve having one side communicating with the inside of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combustion engine
  • valve adjustable passageway having one end communicating with the outside atmosphere and its other end communicating with the inside of said upper housing above the upper skirt of said spool,
  • a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement
  • an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt
  • an adjustable valve means adapted to connect the inside of said lower housing to the intake manifold of an internal combustion engine
  • a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement
  • an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt
  • an adjustable valve means adapted to connect the inside of said lower housing to the intake manifold of an internal combustion engine
  • a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement
  • an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt
  • an adjustable valve means adapted to connect the inside of said lower housing to the intake manifold of an internal combustion engine
  • a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve
  • a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement
  • an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt
  • an adjustable valve means adapted to connect the inside of said lower housing to the intake manifold of an internal combustion engine
  • a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve
  • a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement
  • an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt
  • an adjustable valve means adapted to connect the inside of said lower housing to the intake manifold of an internal combustion engine
  • a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve
  • a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement
  • an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt
  • an adjustable valve means adapted to connect the inside of said lower housing to the intake manifold of an internal combustion engine
  • a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve
  • a vertically movable spool having an upper skirt in said housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement
  • an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt
  • an adjustable valve means adapted to connect the inside of said lower housing to the intake mainfold of aninternal combustion engine
  • a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve
  • a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement
  • an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt
  • an adjustable valve means adapted to connect the inside of said lower housing to the intake mainfold of an internal combustion engine
  • a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve
  • a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement
  • an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt
  • an adjustable valve means adapted to connect the inside of said lower housing to the intake manifold of an internal combustion engine
  • a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve
  • a lower carburetor housing having a top opening, a
  • a vertically slidable hollow spool having a lower skirt secured to said carburetor bowl and an upper portion vertically slidable on said upper housing,
  • first conduit means connecting the inside of said carburetor bowl to a source of liquid combustible fuel
  • valve having one side communicating with the compartment area of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combustion engine.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)

Description

Sept. 20, 1966 G. R. MORTON CARBURETOR FOR INTERNAL COMBUSTION ENGINES Filed Sept. 15, 1964 2 Sheets-Sheet 1 INVENTOR.
Sept. 20, 1966 G. R. MORTON GARBURETOR FOR INTERNAL COMBUSTION ENGINES 2 Sheets-Sheet 2 Filed Sept. 15, 1964 United States Patent 3,273,868 CARBURETOR FOR INTERNAL COMBUSTION ENGINES Glenn R. Morton, 7025 Sarpy Ave., Omaha, Nebr. Filed Sept. 15, 1964, Ser. No. 396,532 17 Claims. (Cl. 261-39) This is a continuation-in-part application of the application, Serial No. 32(1097 filed October 30, 1963.
This invention relates to carburetors for internal combustion engines and more particularly to a carburetor that has its needle valve means adjustably actuated by the varying atmospheric pressure relative to the minus atmospheric pressure inside the engine intake manifold.
Substantially, all internal combustion engines employ a carburetor to mix the liquid fuel, such as gasoline, and air into an ignitable gas. Obviously the efliciency of the engine will depend on the proper mixture of the air and liquid fuel. Most standard carburetors may be adjusted for maximum efficiency for a given engine speed, and/or a given atmospheric pressure. However, most carburetors have only one general use control, i.e., a butterfly throttle valve in the air inlet conduit and no automatic compensating means. This air flow is induced by the engine piston suction and is hereinafter referred to as manifold pressure.
One object of this invention is to provide a carburetor having an adjustable fixed needle valve with a vertically movable bowl.
A still further object of my invention is to provide a carburetor having a needle valve that is capable of limited floating action for power enrichment.
A still further object of my invention is to provide a carburetor with a needle valve adjustably responsible to a temperature sensitive bimetal unit for fuel enrichment during cold starts.
A still further object of my invention is to provide a carburetor that has its metering orifices below the fuel surface level of the carburetor bowl.
A still further object of my invention is to provide a carburetor having a passageway communicating with the engine intake manifold back of the butterfly control valve for the removal of any free fuel dropping incidently deposited in the bottom area of the unit.
A further object of this invention is to provide a carburetor that will balance its throttle position with the outside atmosphere as the engine manifold pressure changes.
A still further object of this invention is to provide a carburetor that will automatically enrich the mixture of gasoline at critical engine stages of operation that require such additional fuel.
A still further object of this invention is to provide a carburetor that provides rapid engine acceleration.
A still further object of this invention is to provide a carburetor that idles perfectly.
A still further object of this invention is to provide a carburetor that is so efiicient under all conditions that the pollution of the air from the engines exhaust is greatly reduced.
A still further object of my invention is to provide a carburetor that once adjusted for a given internal combustion engine will be substantially self adjusting for varying atmospheric conditions and varying temperature conditions.
A still further object of my invention is to provide a high efliciency carburetor that successfully mixes the fuel and air prior to their entry into the combustion chambers of the internal combustion engine.
Still further objects of my invention are to provide a carburetor for internal combustion engines that is economical in manufacture and durable in use.
These and other objects will be apparent to those skilled in the art.
This invention consists in the construction, arrangements, and combination of the various parts of the device, whereby the objects contemplated are attained as hereinafter more fully set forth, specifically pointed out in the claims, and illustrated in the accompanying drawings, in which:
FIG. 1 is a perspective view of my carburetor;
FIG. 2 is an enlarged cross-sectional view of my carburetor;
FIG. 3 is a perspective plan view of the fuel distribution spool with sections cut away to more fully illustrate its construction;
FIG. 4 is an enlarged perspective view of the float control lever, and
F IG. 5 is a plan view of the temperature sensitivity bimetal adjusting means for the carburetor needle valve taken in line 55 of FIG. 2.
Referring to the drawings the numeral generally designates the lower portion of the carburetor housing having a circular opening 11 in its top, an interior area 12 and an area 13 adapted to be in communication with the intake manifold of an internal combustion engine. The numeral 15 designates the usual butterfly valve adapted to be secured to the accelerator lever of the engine. This butterfly valve separates the areas 12 and 13. Suspended above and spaced from the general housing 10 by bracket legs 16, is the upper inverted cup housing generally designated by the numeral 17. The inside cylindrical area of the member 17 is designated by the numeral 19. Imposed in the inverted bottom of the member 17 is a cylinder element 20 having a reduced downwardly extending circular wall 21 at its lower area. Imposed in this reduced circular wall is a fixed tube unit 22. Vertically slidably mounted on the lower portion of the tube unit 22 is a spool unit 23 having an upper skirt portion 25 vertically movable in the inverted cup 17 and a lower skirt portion 26 vertically movable within the upper portion of the area as shown in FIG. 2. The skirt 26 has an upper outer projecting circular lip 27. Fixed to the under periphery of the skirt 27 is an upwardly extending lip 29 creating with the lip 27, an open circular channel 30. The central area of the spool has a hollow area 31. The numeral 32 designates radially extending passageways in the lower skirt communicating with the area 31 and the circular channel 30. Extending upwardly from the bottom of the area 12 is collar 33. The numeral 35 designates a centrally located downwardly extending tube on the bottom of the skirt 26 and which has its inside top communicating with the area 31. The numeral 36 designates the carburetor bowl secured to the under side of the skirt 26 by a nut 37 threaded into the lower end of the tube 35. Extending through the wall of the lower end portion of the tube 35 are passageways 39 connecting the inside bottom area of the bowl 36 with the inside of the tube 35. Directly above the passageways 39 and inside the tube 35 is the needle valve seat 40. The numeral 41 designates the carburetor bowl float. The numeral 42 designates a valve fixture extending through the skirt 36. This fixture has a slidable valve stem 43 in its passageway and which is engaged by a hinged lever 45. This hinged lever 45 rides on the float 40. When the float drops, the lever arm will drop and the valve stem 43 moves to a lowered open condition. When the float is elevated by sufficient fuel in the bowl, the lever 45 is thereby raised, and the valve stem is thereby elevated to close the valve means fixture and prevent further liquid fuel entering the carburetor bowl. Thus a suitable level of fuel will automatically be maintained in the carburetor bowl. Inasmuch as the spool 23 and carburetor bowl reciprocate upwardly and downwardly, the fuel supply conduit 46 is flexible. This conduit 46 is adapted to be in communication with a source of liquid fuel. The numeral 47 designates a coil spring under the carburetor bowl for yieldingly holding the carburetor bowl and spool 23 in an upward position of their sliding movement. If liquid fuel settles in the bottom of the housing 10, it passes through passageways 49 in the lower area of the collar 33, and is suction drawn from the in side bottom area surrounded by the collar 33 by the passageway 50 that communicates with this area and the area back of the butterfly valve 15.
Threaded downwardly in the tube 22 is cylinder 51. The needle valve unit consists of a needle valve 52, a head 53 at the top of the needle and a tube 55 extending downwardly from the head and embracing the upper portion of the needle as shown in FIG. 2. The numeral 56 designates a coil spring embracing the tube 55, having one end engaging the underside of the head 53 and its other end engaging the cylinder 51, for yieldingly holding the needle valve in an upward position. The tapered lower end portion of the needle valve extends through the needle valve seat 40. A sealing ring 57 is between the cylinder 51 and the tube 22. Slidably mounted in the upper enlarged area of the cylinder element is a piston 59 having a peripheral compression ring 60. Threaded in the piston 59 is a nut 61. Threaded through the nut 61 and capable of being engaged by the head 53 is a hollow tubular member 62. The numeral 63 designates a tubular bracket on the top of the piston 59. The numeral 65 designates a coiled heat sensitive bi-metal spring having one end secured to the bracket 63 and its other end secured to the fitting 64 threaded into the tubular member 62 as shown in FIG. 5. The numeral 66 designates a pin on the needle head and extending upwardly in the member 64. The numeral 6'7 designates an adjusting screw threaded into the upper end of the member 6 and capable of engaging the top of the pin 66.
The upper skirt has its periphery flexibly connected to the top 17 by a rubber or like flexible ring 69, thereby creating a variable area 70 above the spool 23. The numeral 71 designates a passageway having one end communicating with the outside atmosphere and its other end communicating with the area 70. The numeral 72 designates an adjustable valve means imposed in the passageway 71. The numeral 73 designates a passageway having one end communicating with the area back of the butterfly valve 15 and its other end communicating with the enclosed area below the piston 59. Any engine back firing is relieved by a spring loaded valve 75 communicating with the engine intake back of the butterfly valve 15. In order to give a whirling action to the liquid entering the mote at the periphery of the skirt 26, I have air passageways 76 in the skirt 26 having their air inlet ends communicating with the top of the skirt, their lengths extending at a tangent to the periphery of the skirt 26, and their air exit ends communicating with mote trough 30. There is an air passageway for each of the fuel passageways 32 and preferably each communicates with the mote trough 30 at the same point as its adjacent fuel passageway 32. The large areas forward of and to the rear of the butterfly valve 15 provide large fuel and air mixing chambers, thereby giving great efliciency and much less outside air pollution from the engine using my carburetor. When the engine is started and the butterfly valve 15 opened, the suction caused by the engine will pull the bowl 36 downwardly against the action of the spring 47. This action moves the valve seat downwardly and in a direction away from the tapered needle valve 52, thus permitting liquid fuel to be sucked upwardly through the tube 35, into the area 31, and through the fuel passageways 32 into the trough mote 30. The outside atmosphere will be sucked downwardly around the skirt 26, thereby picking up fuel from the overflowing mote trough 36. The mixed liquid fuel and air will travel past the butterfly valve 15 and into the intake manifold of the combustion engine. However, the up and down movement of the spool 23 may be yieldingly adjustably regulated by the valve means 72. The greater the amount of atmospheric pressure capable of being admitted to the area 19, the easier the spool 23 will be drawn downwardly by suction exerted on the spool skirt 26. If the atmospheric pressure in the area 19 is relatively low, due to valve adjustment, or outside atmospheric pressure, the resistance to the downward movement of the spool 23 will be relatively increased. As will be appreciated by the structure of the needle valve assembly, the needle valve is of a floating type having three control adjustments, two of which are automatic. The spring 56 yieldingly holds the needle valve in an upward position of its vertical sliding movement. The upperward limit of the movement of the needle valve relative to the core 62 and piston 59 is adjustably obtained by the screw 67 as shown in FIG. 2 and is of manual adjustment. The piston 59 is actuated automatically because its bottom side is affected by engine suction through the conduit 73. When there exists great suction back of the butterfly valve 15, the piston 59 will be drawn downwardly thereby lowering the needle valve relative to the needle valve seat 40. After the engine is running smoothly, the suction below the piston 59 will decrease, the needle valve spring will raise the needle and piston 59 and the needle valve will be in upper float condition thereby giving power enrichment. The second automatic needle valve control is the coiled heat sensative bi-metal band 65. When the coiled band 65 is cold it Will contract, thereby screwing the core 65, upwardly and permitting the needle to raise for the enrichment of the combustible engine fuel for cold engine starts. If the coil 65 is warm, or is heated, it will screw the core 64 downwardly in the piston 59 thereby lowering the needle valve relative to the piston 59, accordingly. I recommend that for general use, the needle valve spring be adjusted to a load of approximately seven inches of vacuum to obtain power enrichment. The spring 47 should have a load of approximately one inch of vacuum and the spring loaded valve be approximately loaded for one inch of vacuum.
From the foregoing, it will be appreciated that I have provided a highly eflicient carburetor for internal combustion engines, and after being initially adjusted, will function automatically to compensate for varying conditions of pressures, temperatures, and engine speeds and requirements.
Some changes may be made in the construction and arrangement of my carburetor for'internal combustion engines without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims, any modified forms of structure or use of mechanical equivalents which may be reasonably included Within their scope.
I claim:
*1. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper housing spaced apart from said lower housing,
a vertically movable carburetor bowl in said lower housing,
a means for yieldingly holding said carburetor bowl in an upward position of its movement,
a vertically slidable spool having a lower skirt secured to said carburetor bowl and an upper skirt vertically slidable in said upper housing,
means for connecting the inside of said carburetor bowl to a source of liquid combustible fuel,
a needle valve seat associated with said carburetor bowl,
a fuel passageway in the said lower skirt of said spool having one end operatively communicating with said needle valve seat and its other end exiting at the periphery of said lower skirt,
a tapered needle valve associated with said needle valve seat,
means for holding said needle valve at least in one direction,
a valve having one side communicating with the inside of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combustion engine,
and a valve adjustable passageway having one end communicating with the outside atmosphere and its other end communicating with the inside of said upper housing above the upper skirt of said spool.
2. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper housing spaced apart from said lower housa vertically movable carburetor bowl in said lower housa means for yieldingly holding said carburetor bowl in an upward position of its movement,
a vertically slidable spool having a lower skirt secured to said carburetor 'bowl and an upper skirt vertically slidable in said upper housing,
means for sealing the periphery of said upper skirt of said spool and said upper housing for preventing the movement of outside atmosphere into or out Otf the area between the inside of said upper housing and the top of the upper skirt of said spool,
means for connecting the inside of said carburetor bowl to a source of liquid combustible fuel,
a needle valve seat associated with said carburetor bowl,
a fuel passageway in the said lower skirt of said spool having one end operatively communicating with said needle valve seat and its other end exiting at the periphery of said lower skirt,
a tapered needle valve associated with said needle valve seat,
means for holding said needle valve at least in one direction,
a valve having one side communicating with the inside of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combustion engine,
and a valve adjustable passageway having one end communicating with the outside atmosphere and its other end communicating with the inside of said upper housing above the upper skirt of said spool.
3. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper housing spaced apart from said lower housing,
a vertically movable carburetor bowl in said lower housing,
a means for yieldingly holding said carburetor bowl in an upward position of its movement,
a vertically slidable spool having a lower skirt secured to said carburetor bowl and an upper skirt vertically slidable in said upper housing,
means lfOl' connecting the inside of said carburetor bowl to a source of liquid combustible fuel,
a needle valve seat associated with said carburetor bowl,
a fuel passageway in the said lower skirt of said spool having one end operatively communicating with said needle valve seat and its other end exiting at the periphery of said lower skirt,
a tapered needle valve associated with said needle valve seat,
adjustable means for holding said needle valve at least in one direction,
a valve having one side communicating with the inside of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combustion engine,
and a valve adjustable passageway having one end communicating with the outside atmosphere and its other end communicating with the inside of said upper housing above the upper skirt of said spool.
4. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper housing spaced apart firom said lower housing,
a vertically movable carburetor bowl in said lower housing,
a means for yieldingly holding said carburetor bowl in an upward position of its movement,
a vertically slidable spool having a lower skirt secured to said carburetor bowl and an upper skirt vertically slidable in said upper housing,
means for connecting the inside of said carburetor bowl to a source of liquid combustible fuel,
a needle valve seat associated with said carburetor bowl,
a fuel passageway in the said lower skirt of said spool having one end operatively communicating with said needle valve seat and its other end exiting at the periphery of said lower skirt,
a tapered needle valve associated with said needle valve seat,
means for holding said needle valve at least in one direction,
a valve having one side communicating with the inside of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combusion engine,
a valve adjustable passageway having one end communicating with the outside atmosphere and its other end communicating with the inside of said upper housing above the upper skirt of said spool,
and a spring loaded valve means communicating with the outside atmosphere and that side of said valve that is adapted to be in communication with the intake manifold of an internal combustion engine.
5. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper housing spaced apart from said lower housing,
a vertically movable carburetor bowl in said lower housing,
a means for yieldingly holding said carburetor bowl in an upward position of its movement,
a vertically slidable spool having a lower skirt secured to said carburetor bowl and an upper skirt vertically slidable in said upper housing,
means for connecting the inside of said carburetor bowl to a source of liquid combustible fuel,
a needle valve seat associated with said carburetor bowl,
'a fuel passageway in the said lower skirt of said spool having one end operatively communicating with said needle valve seat and its other end exiting at the periphery of said lower skirt,
a tapered needle valve associated with said needle valve seat,
means for holding said needle valve at least in one direction,
a valve having one side communicating with the inside of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combustion engine,
a valve adjustable passageway having one end communicating with the outside atmosphere and its other end communicating with the inside of said upper housing above the uppr skirt of said. spool,
and a passageway having one end communicating with the inside bottom of said carburetor housing and that side of said valve that is adapted to be in communication with the intake manifold of an internal combustion engine.
6. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper housing spaced apart from said lower housing,
a vertically movable carburetor bowl in said lower housing,
a means for yieldingly holding said carburetor bowl in an upward position of its movement,
a vertically slidable spool having a lower skirt secured to said carburetor bowl and an upper skirt vertically slidable in said upper housing,
means for connecting the inside of said carburetor bowl to a source of liquid combustible fuel,
a needle valve seat associated with said carburetor bowl,
a fuel passageway in the said lower skirt of said spool having one end operatively communicating with said needle valve seat and its other end exiting at the periphery of said lower skirt,
a tapered needle valve associated with said needle valve seat,
heat controlled means for holding said needle valve at least in one direction,
a valve having one side communicating with the inside of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combustion engine,
and a valve adjustable passageway having one end communicating with the outside atmosphere and its other end communicating with the inside of said upper housing above the upper skirt of said spool.
'7. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper housing spaced apart from said lower housing,
a vertically movable carburetor bowl in said lower housing,
a means for yieldingly holding said carburetor bowl in an upward position of its movement,
a vertically sl-idable spool having a lower skirt secured to said carburetor bowl and an upper skirt vertically slidable in said upper housing,
means for connecting the inside of said carburetor bowl to a source of liquid combustible fuel,
a needl valve seat associated with said carburetor bowl,
a fuel passageway in the said lower skirt of said spool having one end operatively communicating with said needle valve seat and its other end exiting at the periphery of said lower skirt,
a tapered needle valve associated with said needle valve seat,
means for holding said needle valve at least in one direction,
a valve having one side communicating with the inside of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combustion engine,
a valve adjustable passageway having one end communicating with the outside atmosphere and its other end communicating with the inside of said upper housing above the upper skirt of said spool,
and a float actuated valve means for maintaining a given level of liquid fuel inside said carburetor bowl.
3. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper inverted cup housing spaced from said lower housing,
a vertically movable carburetor bowl in said lower housing,
a means for yieldingly holding said carburetor bowl in an upward position of its vertical movement,
a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement,
means for sealing the upper skirt of said spool and said upper housing for preventing the passage of air past said upper skirt and into the inside area of said upper housing,
an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt,
means for connecting the inside of said carburetor bowl with a source of liquid combustible fuel,
a fixed needle valve seat associated with said carburetor bowl,
a plurality of fuel passageways in said lower skirt, each having one end operatively communicating with said needle valve seat and exiting at the periphery of said lower skirt,
a vertically movable needle valve associated with said needle valve seat,
a spring means for yieldingly holding said needle valve in an upward position of its movement,
a cylinder on said upper housing,
a vertically movable piston in said cylinder,
a passageway having one end communicating with the inside of said cylinder below said piston and its other end adapted to be in operative communication with the intake manifold of an internal combustion engine,
an adjustable valve means adapted to connect the inside of said lower housing to the intake manifold of an internal combustion engine,
and a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve.
9. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper inverted cup housing spaced from said lower housing,
a vertically movable carburetor bowl in said lower housing,
a means for yieldingly holding said carburetor bowl in an upward position of its vertical movement,
a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement,
means for flexibly sealing the upper skirt of said spool and said upper housing for preventing the passage of air past said upper skirt and into the inside area of said upper housing,
an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt,
means for connecting the inside of said carburetor bowl with a source of liquid combustible fuel,
a fixed needle valve seat associated with said carburetor bowl,
a plurality of fuel passageways in said lower skirt, each having one end operatively communicating with said needle valve seat and exiting at the periphery of said lower skirt,
a vertically movable needle valve associated with said needle valve seat,
a spring means for yieldingly holding said needle valve in an upward position of its movement,
a cylinder of said upper housing,
a vertically movable piston in said cylinder,
a passage way having one end communicating with the inside of said cylinder below said piston and its other end adapted to be in operative communication with the intake manifold of an internal combustion engine,
an adjustable valve means adapted to connect the inside of said lower housing to the intake manifold of an internal combustion engine,
and a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve.
10. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper inverted cup housing spaced from said lower housing,
a vertically movable carburetor bowl in said lower housing,
a means for yieldingly holding said carburetor bowl in an upward position of its vertical movement,
a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement,
means for sealing the upper skirt of said spool and said upper housing for preventing the passage of air past said upper skirt and into the inside area of said upper housing,
an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt,
means for connecting the inside of said carburetor bowl with a source of liquid combustible fuel,
a fixed needle valve seat associated with said carburetor bowl,
a plurality of fuel passageways in said lower skirt, each having one end operatively communicating with said needle valve seat and exiting at the periphery of said lower skirt,
a vertically movable needle valve associated with said needle valve seat,
spring means for yieldingly holding said needle valve in an upward position of its movement,
a cylinder on said upper housing,
a vertically movable piston in said cylinder,
a passageway having one end communicating with the inside of said cylinder below said piston and its other end adapted to be in operative communication with the intake manifold of an internal combustion engine,
an adjustable valve means adapted to connect the inside of said lower housing to the intake manifold of an internal combustion engine,
a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve,
and an automatic temperature controlled means for adjusting said stop means relative to said piston.
11. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper inverted cup housing spaced from said lower housing,
a vertically movable carburetor bowl in said lower housa means for yieldingly holding said carburetor bowl in an upward position of its vertical movement,
a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement,
means for sealing the upper skirt of said spool and said upper housing for preventing the passage of air past said upper skirt and into the inside area of said upper housing,
an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt,
means for connecting the inside of said carburetor bowl with a source of liquid combustible fuel,
a fixed needle valve seat associated with said carburetor bowl,
a plurality of fuel passageways in said lower ski-rt, each having one end operatively communicating with said needle valve seat and exiting at the periphery of said lower skirt,
a vertically movable needle valve associated with said needle valve seat,
a spring means for yieldingly holding said needle valve in an upward position of its movement,
a cylinder on said upper housing,
a vertically movable piston in said cylinder,
a passageway having one end communicating with the inside of said cylinder below said piston and its other end adapted to be in operative communication with the intake manifold of an internal combustion engine,
an adjustable valve means adapted to connect the inside of said lower housing to the intake manifold of an internal combustion engine,
a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve,
and a manual adjustable control means for adjusting said stop means relative to said piston.
12. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper inverted cup housing spaced from said lower housing,
a vertically movable carburetor bowl in said lower housing,
a means for yieldingly holding said carburetor bowl in an upward position of its vertical movement,
a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement,
means for sealing the upper skirt of said spool and said upper housing for preventing the passage of air past said upper skirt and into the inside area of said upper housing,
an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt,
means for connecting the inside of said carburetor bowl with a source of liquid combustible fuel,
a fixed needle valve seat associated with said carburetor bowl,
a plurality of fuel passageways in said lower skirt, each having one end operatively communicating with said needle valve seat and exiting at the periphery of said lower skirt,
a vertically movable needle valve associated with said needle valve seat,
a spring means for yieldingly holding said needle valve in an upward position of its movement,
a cylinder on said upper housing,
a vertically movable piston in said cylinder,
a passageway having one end communicating with the inside of said cylinder below said piston and its other end adapted to be in operative communication With the intake manifold of an internal combustion engine,
an adjustable valve means adapted to connect the inside of said lower housing to the intake manifold of an internal combustion engine,
a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve,
and a wall in said lower housing slidably supporting said carburetor bowl.
13. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper inverted cup housing spaced from said lower housing,
a vertically movable carburetor bowl in said lower housing,
a means for yieldingly holding said carburetor bowl in an upward position of its vertical movement,
a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement,
means for sealing the upper skirt of said spool and said upper housing for preventing the passage of air past said upper skirt and into the inside area of said upper housing,
an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt,
means for connecting the inside of said carburetor bowl with a source of liquid combustible fuel,
a fixed needle valve seat associated with said carburetor bowl,
a plurality of fuel passageways in said lower skirt, each having one end operatively communicating with said needle valve seat and exiting at the periphery of said lower skirt,
a vertically movable needle valve associated with said needle valve seat,
a spring means for yieldingly holding said needle valve in an upward position of its movement,
a cylinder on said upper housing,
a vertically movable piston in said cylinder,
a passageway having one end communicating with the inside of said cylinder below said piston and its other end adapted to be in operative communication with the intake manifold of an internal combustion engine,
an adjustable valve means adapted to connect the inside of said lower housing to the intake manifold of an internal combustion engine,
a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve,
a wall in said lower housing slidably supporting said carburetor bowl,
surplus liquid passageways extending through said wall,
and a passageway having one end communicating with the inside lower housing and its other end adapted to be in operative communication with the intake manifold of an internal combustion engine.
14. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper inverted cup housing spaced from said lower housing,
a vertically movable carburetor bowl in said lower housing,
a means for yieldingly holding said carburetor bowl in an upward position of its vertical movement,
a vertically movable spool having an upper skirt in said housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement,
means for sealing the upper skirt of said spool and said upper housing for preventing the passage of air past said upper skirt and into the inside area of said upper housing,
an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt,
means for connecting the inside of said carburetor bowl with a source of liquid combustible fuel,
a fixed needle valve seat associated with said carburetor bowl,
a plurality of fuel passageways in said lower skirt, each having one end operatively communicating with said needle valve seat and exiting at the periphery of said lower skirt,
a vertically movable needle valve associated with said needle valve seat,
a spring means for yieldingly holding said needle valve in an upward position of its movement,
a cylinder on said upper housing,
a vertically movable piston in said cylinder,
a passageway having one end communicating with the inside of said cylinder below said piston and its other end adapted to be in operative communication with the intake manifold of an internal combustion engine,
an adjustable valve means adapted to connect the inside of said lower housing to the intake mainfold of aninternal combustion engine,
a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve,
and a trough mote at the periphery of the lower skirt of said spool.
15. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper inverted cup housing spaced from said lower housing,
a vertically movable carburetor bowl in said lower housing,
a means for yieldingly holding said carburetor bowl in an upward position of its vertical movement,
a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement,
means for sealing the upper skirt of said spool and said upper housing for preventing the passage of air past said upper skirt and into the inside area of said upper housing,
an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt,
means for connecting the inside of said carburetor bowl with a source of liquid combustible fuel,
a fixed needle valve seat associated with said carburetor :bowl,
a plurality of fuel passageways in said lower skirt, each having one end operatively communicating with said needle valve seat and exiting at the periphery of said lower skirt,
a vertically movable needle valve associated with said needle valve seat,
a spring means for yieldingly holding said needle valve in an upward position of its movement,
a cylinder on said upper housing,
a vertically movable piston in said cylinder,
a passageway having one end communicating with the inside of said cylinder below said piston and its other end adapted to be in operative communication with the intake manifold of an internal combustion engine,
an adjustable valve means adapted to connect the inside of said lower housing to the intake mainfold of an internal combustion engine,
a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve,
a trough mote at the periphery of the lower skirt of said spool,
and a plurality of air passageways in the lower skirt of said spool, each having one end communicating with the top of said lower skirt and its other end exiting into said trough mote.
16. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening,
an upper inverted cup housing spaced from said lower housing,
a vertically movable carburetor bowl in said lower housing,
a means for yieldingly holding said carburetor bowl in an upward position of its vertical movement,
a vertically movable spool having an upper skirt in said upper housing and a lower skirt secured to said carburetor bowl and capable of substantially closing the top opening in said lower housing when said carburetor bowl is in an upward position of its vertical movement,
means for sealing the upper skirt of said spool and said upper housing 'for preventing the passage of air past said upper skirt and into the inside area of said upper housing,
an adjustable valve means for permitting air to pass into or out of the area in said upper housing above said upper skirt,
means for connecting the inside of said carburetor bowl with a source of liquid combustible fuel,
a fixed needle valve seat associated with said carburetor bowl,
a plurality of fuel passageways in said lower skirt, each having one end operatively communicating with said needle valve seat and exiting at the periphery of said lower skirt,
a vertically movable needle valve associated with said needle valve seat,
a spring means for yieldingly holdin said needle valve in an upward position of its movement,
a cylinder on said upper housing,
a vertically movable piston in said cylinder,
a passageway having one end communicating with the inside of said cylinder below said piston and its other end adapted to be in operative communication with the intake manifold of an internal combustion engine,
an adjustable valve means adapted to connect the inside of said lower housing to the intake manifold of an internal combustion engine,
a stop means associated with said needle valve and said piston for limiting the upper vertical movement of said needle valve,
a trough mote at the periphery of the lower skirt of said spool,
and a plurality of air passageways in the lower skirt of said spool, each having one end communicating with the top of said lower skirt and its other end exiting into said trough mote,
said air passageways extending at a tangent to the periphery of said lower skirt.
17. In a carburetor for internal combustion engines,
a lower carburetor housing having a top opening, a
bore area and a compartment area,
an upper housing spaced apart from said lower housing,
a vertically movable carburetor bowl in said lower housing bore area,
a means for yiel-dingly holding said carburetor bowl in an upward position of its movement,
a vertically slidable hollow spool having a lower skirt secured to said carburetor bowl and an upper portion vertically slidable on said upper housing,
first conduit means connecting the inside of said carburetor bowl to a source of liquid combustible fuel,
second conduit means for discharging fuel from said fuel bowl,
a needle valve seat in said second conduit means,
a fuel passageway in said lower skirt of said spool having one end operatively communicating with said needle valve seat and its other end exiting at the periphery of said lower skirt,
means mounting a tapered needle valve within the hollow portion of said spool and extending adjacent said needle valve seat,
and a valve having one side communicating with the compartment area of said lower carburetor housing and its other side adapted to be in communication with the intake manifold of an internal combustion engine.
References Cited by the Examiner UNITED STATES PATENTS 2,887,309 5/1959 Raynor 261 FOREIGN PATENTS 435,768 9/1935 Great Britain. 515,040 11/1939 Great Britain. 528,939 11/ 1940 Great Britain.
HARRY B. THORNTON, Primary Examiner.
T. R. MILES, Assistant Examiner.

Claims (1)

1. IN A CARBURETOR FOR INTERNAL COMBUSTION ENGINES, A LOWER CARBURETOR HOUSING HAVING A TOP OPENING, AN UPPER HOUSING SPACED APART FROM SAID LOWER HOUSING, A VERTICALLY MOVABLE CARBURETOR BOWL IN SAID LOWER HOUSING, A MEANS FOR YIELDINGLY HOLDING SAID CARBURETOR BOWL IN AN UPWARD POSITION OF ITS MOVEMENT, A VERTICALLY SLIDABLE SPOOL HAVING A LOWER SKIRT SECURED TO SAID CARBURETOR BOWL AND AN UPPER SKIRT VERTICALLY SLIDABLE IN SAID UPPER HOUSING, MEANS FOR CONNECTING THE INSIDE OF SAID CARBURETOR BOWL TO A SOURCE OF LIQUID COMBUSTIBLE FUEL, A NEEDLE VALVE SEAT ASSOCIATED WITH SAID CARBURETOR BOWL, A FUEL PASSAGEWAY IN THE SAID LOWER SKIRT OF SAID SPOOL HAVING ONE END OPERATIVELY COMMUNICATING WITH SAID NEEDLE VALVE SEAT AND ITS OTHER END EXITING AT THE PERIPHERY OF SAID LOWER SKIRT, A TAPERED NEEDLE VALVE ASSOCIATED WITH SAID NEEDLE VALVE SEAT, MEANS FOR HOLDING SAID NEEDLE VALVE AT LEAST IN ONE DIRECTION, A VALVE HAVING ONE SIDE COMMUNICATING WITH THE INSIDE OF SAID LOWER CARBURETOR HOUSING AND ITS OTHER SIDE ADAPTED TO BE IN COMMUNICATION WITH THE INTAKE MANIFOLD OF AN INTERNAL COMBUSTION ENGINE, AND A VALVE ADJUSTABLE PASSAGEWAY HAVING ONE END COMMUNICATING WITH THE OUTSIDE ATMOSPHERE AND ITS OTHER END COMMUNICATING WITH THE INSIDE ATMOSPHERE AND ITS OTHER HOUSING ABOVE THE UPPER SKIRT OF SAID SPOOL.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3563524A (en) * 1969-05-28 1971-02-16 Edgar D Jelken Carburetor for internal combustion engines
US3653642A (en) * 1968-10-22 1972-04-04 Zenith Carburetter Co Ltd Carburettors
US3959418A (en) * 1975-05-08 1976-05-25 James T. Scott Carburetor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB435768A (en) * 1934-03-27 1935-09-27 Hans Eberhard Jacoby Improved carburetting devices for internal combustion engines
GB515040A (en) * 1938-02-23 1939-11-24 Self Priming Pump And Engineer Improvements in and relating to carburettors for internal combustion engines
GB528939A (en) * 1938-05-27 1940-11-11 James Leighton Whiteman Improvements in carburettors for internal-combustion engines
US2887309A (en) * 1957-09-06 1959-05-19 Gilbert E Raynor Carburetors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB435768A (en) * 1934-03-27 1935-09-27 Hans Eberhard Jacoby Improved carburetting devices for internal combustion engines
GB515040A (en) * 1938-02-23 1939-11-24 Self Priming Pump And Engineer Improvements in and relating to carburettors for internal combustion engines
GB528939A (en) * 1938-05-27 1940-11-11 James Leighton Whiteman Improvements in carburettors for internal-combustion engines
US2887309A (en) * 1957-09-06 1959-05-19 Gilbert E Raynor Carburetors

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653642A (en) * 1968-10-22 1972-04-04 Zenith Carburetter Co Ltd Carburettors
US3563524A (en) * 1969-05-28 1971-02-16 Edgar D Jelken Carburetor for internal combustion engines
US3959418A (en) * 1975-05-08 1976-05-25 James T. Scott Carburetor

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