Carburetor

Claim 2

A carburetor comprising: means defining an air passageway, for directing an airstream; a movable throttle block having an airstream opening therein and movable across said passageway; a tapered metering pin carried by said movable throttle block and extending across said opening from one side thereof through a lateral aperture in the other side of said opening; whereby said metering pin is also movable with said throttle block; means, comprising a fixedly positioned fuel tube extending through said aperture and having a metering element incorporating a fuel dispensing bore telescopically embracing said metering pin, for dispensing fuel into said airstream; said fuel dispensing bore being fixedly positioned in predetermined relation to said air passageway; said fuel tube comprising a flexible tubing alignment sector; means for moving said throttle block for causing said airstream opening to throttle said airstream to a given extent, and for causing a selectable section of said tapered metering pin to occupy said bore of said fixedly positioned fuel tube, for metering a given amount of fuel into said airstream in accordance with the position of said block; and a sealing means movable with said block and surrounding said metering pin at said one side of said opening and being sealably engageable with said fuel dispensing bore when said throttle block is moved to a position closing said air passageway.

Claim 3

A carburetor comprising: means, comprising an air passageway, for establishing an airstream; a positionable throttle block having an airstream opening therein; a tapered metering pin mounted in said positionable throttle block; whereby said metering pin is also positionable; means, comprising a fixedly positioned fuel tube having a metering element incorporating a fuel dispensing bore, for dispensing fuel into said airstream; said fuel dispensing bore being fixedly positioned in a predetermined location of said air passageway; means for positioning said throttle block for causing said airstream opening to throttle said airstream to a given extent, and for causing a selectable section of said positionable tapered metering pin to engage said bore of said fixedly positioned fuel tube, for metering a given amount of fuel into said airstream; sealing means positioned at the active end of said positionable throttle block; means for causing said sealing means to be pressure abutted against the fuel dispensing bore of said fuel tube, for shutting off the flow of fuel from said fuel tube; and means for preventing said metering element from being longitudinally displaced; said preventing means comprising a peripheral groove around said fuel tube and further comprising locking means positioned in said peripheral groove, whereby said fuel tube is longitudinally fixedly positioned, but is permitted to assume selected angular orientations.

Claim 4

A carburetor comprising: means, comprising an air passageway, for establishing an airstream; a positionable throttle block having an airstream opening therein; a tapered metering pin mounted in said positionable throttle block; whereby said metering pin is also positionable; means, comprising a fixedly positioned fuel tube having a metering element incorporating a fuel dispensing bore, for dispensing fuel into said airstream; said fuel dispensing bore being fixedly positioned in a predetermined location of said air passageway; means for positioning said throttle block for causing said airstream opening to throttle said airstream to a given extent, and for causing a selectable section of said positionable tapered metering pin to engage said bore of said fixedly positioned fuel tube, for metering a given amount of fuel into said airstream; sealing means positioned at the active end of said positionable throttle block; means for causing said sealing means to be pressure abutted against the fuel dispensing bore of said fuel tube, for shutting off the flow of fuel from said fuel tube; and means for preventing said metering element from being longitudinally displaced; said preventing means comprising a peripheral groove around said fuel tube and further comprising locking means positioned in said peripheral groove, whereby said fuel tube is longitudinally fixedly positioned, but is permitted to assume selected angular orientations.

Claim 5

A carburetor comprising: means defining an air passageway, for directing an airstream; a movable throttle block having an airstream opening therein and movable across said passageway; a tapered metering pin carried by said movable throttle block and extending across said opening from one side thereof through a lateral aperture in the other side of said opening; whereby said metering pin is also movable with said throttle block; means, comprising a fixedly positioned fuel tube extending through said aperture and having a metering element incorporating a fuel dispensing bore telescopically embracing said metering pin, for dispensing fuel into said airstream; said fuel dispensing bore being fixedly positioned in predetermined relation to said air passageway; means for moving said throttle block for causing said airstream opening to throttle said airstream to a given extent, and for causing a selectable section of said tapered metering pin to occupy said bore of said fixedly positioned fuel tube, for metering a given amount of fuel into said airstream in accordance with the position of said block; a sealing means movable with said block and surrounding said metering pin at said one side of said opening and being sealably engageable with said fuel dispensing bore when said throttle block is moved to a position closing said air passageway; and means for preventing said metering element from being longitudinally displaced, said preventing means comprising a peripheral groove around said fuel tube and further comprising locking means positioned in said peripheral groove, whereby said fuel tube is longitudinally fixedly positioned, but is permitted to assume selected angular orientations.

Claim 6

A carburetor comprising: means defining an air passageway, for directing an airstream; a movable throttle block having an airstream opening therein and movable across said passageway; a tapered metering pin carried by said movable throttle block and extending across said opening from one side thereof through a lateral aperture in the other side of said opening; whereby said metering pin is also movable with said throttle block; means, comprising a fixedly positioned fuel tube extending through said aperture and having a metering element incorporating a fuel dispensing bore telescopically embracing said metering pin, for dispensing fuel into said airstream; said fuel dispensing bore being fixedly positioned in predetermined relation to said air passageway; means for moving said throttle block for causing said airstream opening to throttle said airstream to a given extent, and for causing a selectable section of said tapered metering pin to occupy said bore of said fixedly positioned fuel tube, for metering a given amount of fuel into said airstream in accordance with the position of said block; a sealing means movable with said block and surrounding said metering pin at said one side of said opening and being sealably engageable with said fuel dispensing bore when said throttle block is moved to a position closing said air passageway; and means for preventing said metering element from being longitudinally displaced, said preventing means comprising a peripheral groove around said fuel tube and further comprising locking means positioned in said peripheral groove, whereby said fuel tube is longitudinally fixedly positioned, but is permitted to assume selected angular orientations.

Claim 7

A carburetor comprising: means defining an air passageway, for directing an airstream; a movable throttle block having an airstream opening therein and movable across said passageway; a tapered metering pin carried by said movable throttle block and extending across said opening from one side thereof through a lateral aperture in the other side of said opening; whereby said metering pin is also movable with said throttle block; means, comprising a fixedly positioned fuel tube extending through said aperture and having a metering element incorporating a fuel dispensing bore telescopically embracing said metering pin, for dispensing fuel into said airstream; said fuel tube comprising a flexible tubing alignment sector; said fuel dispensing bore being fixedly positioned in predetermined relation to said air passageway; and means for moving said throttle block for causing said airstream opening to throttle said airstream to a given extent, and for causing a selectable section of said tapered metering pin to occupy said bore of said fixedly positioned fuel tube, for metering a given amount of fuel into said airstream in accordance with the position of said block.

Claim 8

A carburetor comprising: means defining an air passageway, for directing an airstream; a movable throttle block having an airstream opening therein and movable across said passageway; a tapered metering pin carried by said movable throttle block and extending across said opening from one side thereof through a lateral aperture in the other side of said opening; whereby said metering pin is also movable with said throttle block; means, comprising a fixedly positioned fuel tube extending through said aperture and having a metering element incorporating a fuel dispensing bore telescopically embracing said metering pin, for dispensing fuel into said airstream; said fuel tube comprising a flexible tubing alignment sector; said fuel dispensing bore being fixedly positioned in predetermined relation to said air passageway; and means for moving said throttle block for causing said airstream opening to throttle said airstream to a given extent, and for causing a selectable section of said tapered metering pin to occupy said bore of said fixedly positioned fuel tube, for metering a given amount of fuel into said airstream in accordance with the position of said block.

Claim 9

A carburetor comprising: means, comprising an air passageway, for establishing an airstream; a positionable throttle block having an airstream opening therein; a tapered metering pin mounted in said positionable throttle block; one end of said tapered metering pin being mounted in a threaded insert that is threadedly engaged in said throttle block; a sealing-retainer positioned at the active end of said throttle block; the central portion of said tapered metering pin being supported by an interference fit into an axial opening of said sealing-retainer; whereby said metering pin is also positionable; means, comprising a fixedly positioned fuel tube, for dispensing fuel into said airstream; said fuel tube comprising a fuel inlet, a flexible tubing alignment sector, and a metering element incorporating a fuel dispensing bore; said fuel dispensing bore being fixedly positioned in a predetermined location of said airstream; means for positioning said throttle block for causing said airstream opening thereof to throttle said airstream to a given extent, for causing a selectable section of said positionable tapered metering pin to engage said bore of said fixedly positioned fuel tube for metering a given amount of fuel into said airstream, and for causing said sealing-retainer to be pressure abutted against the fuel dispensing metering element of said fuel tube for shutting off the flow of fuel from said fuel tube.

Claim 10

A carburetor comprising: means, comprising an air passageway, for establishing an airstream; a positionable throttle block having an airstream opening therein; a tapered metering pin mounted in said positionable throttle block; one end of said tapered metering pin being mounted in a threaded insert that is threadedly engaged in said throttle block; a sealing-retainer positioned at the active end of said throttle block; the central portion of said tapered metering pin being supported by an interference fit into an axial opening of said sealing-retainer; whereby said metering pin is also positionable; means, comprising a fixedly positioned fuel tube, for dispensing fuel into said airstream; said fuel tube comprising a fuel inlet, a flexible tubing alignment sector, and a metering element incorporating a fuel dispensing bore; said fuel dispensing bore being fixedly positioned in a predetermined location of said airstream; means for positioning said throttle block for causing said airstream opening thereof to throttle said airstream to a given extent, for causing a selectable section of said positionable tapered metering pin to engage said bore of said fixedly positioned fuel tube for metering a given amount of fuel into said airstream, and for causing said sealing-retainer to be pressure abutted against the fuel dispensing metering element of said fuel tube for shutting off the flow of fuel from said fuel tube.

Claim 11

The combination of claim 5 including means for preventing said metering element from being longitudinally displaced by the abutting pressure; said preventing means comprising a peripheral groove around said metering element, and further comprising a locking stud positioned in said peripheral groove.

Claim 12

The combination of claim 6 wherein said fuel tube is longitudinally fixedly positioned by said groove and stud, but said fuel inlet is adapted to assume desired angular orientations.

Claim 13

The combination of claim 5 including means, comprising an idle speed adjustment screw, for preventing said abutment of said sealing-retainer against said fuel dispensing metering element, for providing an idle speed flow of fuel from said fuel tube.