Turbine rotor assembly for a rotor-type carburetor
First Claim
1. A rotor-type carburetor comprising:
- a first generally cylindrical rotor section having an anular recess extending axially inwardly from one end portion thereof;
a second generally cylindrical rotor section having an annular end portion complementarily received in said annular recess of said first rotor section;
means defining a circumferential seal between said first and second rotor sections within said annular recess of said first rotor section; and
wherein said annular end portion has an upper end, and wherein said seal-defining means include an O-ring carried by said upper end.
1 Assignment
0 Petitions
Accused Products
Abstract
An injection molded plastic turbine rotor for a rotor-type carburetor is assembled by simply pressing together upper and lower generally cylindrical sections. When joined in this manner the two sections form in the assembled rotor an internal circumferential seal between the two sections, and an internal passageway system which defines a centrifugal pump mechanism within the turbine rotor. In an alternate embodiment, the rotor includes a third plastic section which is captively retained within the rotor, between the upper and lower sections thereof, and is adapted to lockingly receive an end portion of a fuel supply tube inserted downwardly through a central opening formed through the upper section.
15 Citations
33 Claims
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1. A rotor-type carburetor comprising:
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a first generally cylindrical rotor section having an anular recess extending axially inwardly from one end portion thereof; a second generally cylindrical rotor section having an annular end portion complementarily received in said annular recess of said first rotor section; means defining a circumferential seal between said first and second rotor sections within said annular recess of said first rotor section; and wherein said annular end portion has an upper end, and wherein said seal-defining means include an O-ring carried by said upper end.
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2. A rotor-type carburetor comprising:
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a first generally cylindrical rotor section having an annular recess extending axially inwardly from one end portion thereof; a second generally cylindrical rotor section having an annular end portion complementarily received in said annular recess of said first rotor section; means defining a circumferential seal between said first and second rotor sections within said annular recess of said first rotor section; and wherein said first rotor section has an upper end portion having formed therethrough an axially extending central passage adapted for installation therein of a fuel supply tube, the interior surface of said axially extending central passage having formed thereon a radially inwardly projecting sharp-edged annular portion configured to sealingly engage the inserted fuel supply tube.
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3. A rotor-type carburetor comprising:
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a first generally cylindrical rotor section having an annular recess extending axially inwardly from one end portion thereof; a second generally cylindrical rotor section having an annular end portion complementarily received in said annular recess of said first rotor section; means defining a circumferential seal between said first and second rotor sections within said annular recess of said first rotor section; and wherein said first rotor section has a central axial passage extending downwardly through its upper end and adapted to receive a fuel supply tube, said central axial passage being conically outwardly flared in a downward direction, and wherein said first and second rotor sections define within said rotor apparatus a frustroconically shaped passage having a base portion communicating with the lower end of said central axial opening, an annular side portion which circumscribes said central axial opening and flares conically upwardly from said base portion;
an upper annular passage positioned at and communicating with the upper end of said frustoconically shaped annular passage; and
an annular fuel discharge passage positioned radially outwardly of said upper annular passage, said apparatus further comprising orifice means intercommunicating said upper annular passage with said annular fuel discharge passage. - View Dependent Claims (4, 5)
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6. A rotor-type carburetor comprising:
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a first generally cylindrical rotor section having an annular recess extending axially inwardly from one end portion thereof; a second generally cylindrical rotor section having an annular end portion complementarily received in said annular recess of said first rotor section; means defining a circumferential seal between said first and second rotor sections within said annular recess of said first rotor section; and wherein said first rotor section has a central axial passage extending downwardly through its upper end, and wherein said apparatus further comprises means associated with the inner surface of said central axial passage for enhancing the rotational acceleration of fuel therein during rotational acceleration of said turbine rotor apparatus. - View Dependent Claims (7)
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8. A rotor-type carburetor comprising:
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a first generally cylindrical rotor section having an annular recess extending axially inwardly from one end portion thereof; a second generally cylindrical rotor section having an annular end portion complementarily received in said annular recess of said first rotor section; a third rotor section having a generally frustroconical configuration with a central passage formed axially therethrough, said third rotor section being captively retained within said rotor apparatus between said first and second sections thereof and defining with said first and second sections a first frustroconically shaped internal passage in said apparatus which circumscribes the axis thereof. - View Dependent Claims (9, 10, 11)
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12. A rotor type carburetor comprising:
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a first rotor section having a first inlet passageway extending axially therethrough and having a first face; a second rotor section having a second face disposed adjacent the first face; annular seal means positioned between the first and second faces to form a centrifugal pressure chamber for fuel to establish a fuel pressure within the chamber proportional to the rotational velocity of the rotor; dosing orifice means sized to pass a predetermined dose of fuel proportional to the fuel pressure from the chamber for ingestion by an engine; the first and second faces cooperatively defining the pressure chamber in such a manner that the chamber has a volume substantially less than the total volume of the first and second rotor sections combined. - View Dependent Claims (13, 14, 15)
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16. A turbine rotor assembly for a rotor-type carburetor or the like, said turbine rotor assembly being rotatable about an axis and comprising:
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(a) means defining a first annular passage positioned within said assembly, circumscribing said axis, and adapted to receive fuel supplied to said assembly during rotation thereof; (b) means defining a second annular passage positioned within said assembly, circumscribing said axis radially outwardly of said first annular passage and adapted to discharge fuel from said assembly; (c) orifice means carried within said assembly and intercommunicating said first and second annular passages; and (d) means, positioned in said first annular passage upstream from said orifice means relative to the rotational direction of said assembly, for blocking a substantial radial portion of said first annular passage along a relatively small circumferential portion thereof. - View Dependent Claims (17, 18)
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19. A method of assembling the turbine rotor portion of a rotor-carburetor, comprising the steps of:
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(a) providing a first section of the turbine rotor having therein an annular recess; (b) providing a second section of the turbine rotor having thereon an annular boss; (c) inserting said annular boss into said annular recess; and (d) forming a circumferential seal within said annular recess between said annular boss and said first turbine rotor section. - View Dependent Claims (20, 21, 22, 23)
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24. A method of assembling the turbine rotor portion of a rotor-carburetor having a centrally disposed fuel supply tube, said method comprising the steps of:
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(a) providing a first section of the turbine rotor having an axis, an axially extending internal boss, an annular recess circumscribing said internal boss, and a central opening extending axially through said internal boss; (b) providing a second section of the turbine rotor having an axis, an annular boss circumscribing said last-mentioned axis and having an interior base portion; (c) providing a third section of the turbine rotor having a central opening formed therethrough; (d) inserting said annular boss into said annular recess; (e) interposing said third section between said internal boss and said interior base portion; and (f) inserting an end portion of the fuel supply tube inwardly through said central opening of said first section and into press-fitting engagement with the surface of said central opening of said third section. - View Dependent Claims (25, 26)
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27. A method of rotationally retarding the bladed turbine rotor portion of a rotor-type carburetor upon shut-down of an engine in which the carburetor is installed, the turbine rotor having upper and lower opposite end portions rotatably carried, respectively, by upper and lower support structures, the rotating turbine rotor blades creating a downward force on the rotor during engine operating and a lifting force thereon when air inflow to the engine ceases, said method comprising the steps of:
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(a) axially slidably mounting the opposite upper and lower end portions of the turbine rotor, respectively, in the upper and lower support structures; (b) configuring the turbine rotor to permit axial play thereof between the upper and lower support structures; and (c) providing said turbine rotor with a surface positioned and configured to frictionally engage one of said supporting structures when said turbine rotor lifts during air flow shut-down to the engine.
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28. A rotor type carburetor comprising:
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a cylindrical barrel forming a passageway of air to be driven into an engine, upper and lower support spiders attached to the cylindrical barrel and extending into the passageway, a fuel inlet tube extending from the upper support spyder toward the lower support spyder along the axis of the passageway and connected to a supply of fuel, a rotor supported by bearing means on the lower spyder for rotation about the fuel inlet tube, the rotor including; a generally cylindrical first member having an axial bore therethrough for receiving the fuel inlet tube, and a lower face; a generally cylindrical second member having means on the lower end for cooperative engagement with the bearing means on the lower support spyder for rotatably supporting the rotor for rotation about the axis and an upper face disposed adjacent the lower face of the first member; an annular seal formed between the first and second member to form a fuel pressure chamber between the adjacent faces communicating with the fuel inlet tube, for establishing fuel pressure upon rotation of the rotor due to centrifugal forces; a fuel dosing orifice formed in one of the members at a point spaced radially from the axis of the rotation and substantially above the lower end of the fuel inlet tube for providing fluid communication from the fuel pressure chamber to the exterior of the chamber; the lower and upper faces being conformed to form a fuel passageway within the pressure chamber from the lower end of the fuel inlet tube to the dosing orifice of substantially reduced volume when compared to the total available volume; a plurality of turbine blades formed on a cylindrical third member disposed around the first and second members; a circumferential spray edge formed on the lower end of the third member below the turbine blades for atomizing fuel applied thereto as the rotor rotates due to air passing through the barrel and over the turbine blades; and the third member defining a fuel passageway from the dosing orifice to the spray edge. - View Dependent Claims (29, 30, 31, 32, 33)
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Specification