US3685808A — Means of preparing a fuel-air mixture

Claim 1

Independent Claim 176 words

The combination with a carburetor having an air passage; means in the air passage, operable during flow of air through the air passage, to produce a zone in the air passage lower than the normal pressure of air flowing in the air passage, and means defining a passageway for supplying fuel to said zone for entrainment in the air flowing in the air passage, of a sonic generator, comprising: a. means defining a vortex chamber; b. at least one inlet exposed to the air flowing in the air passage and directed tangentially into the vortex chamber to cause a turbulent air vortex in the chamber; c. and an outlet of reduced diameter directed axially from the vortex chamber into the fuel passageway adjacent said reduced pressure zone thereby to intensify the vortex turbulence of the air as it passes through the outlet into the fuel passageway and to cause an intimate and turbulent premixing of air and fuel prior to discharge into said reduced pressure zone for entrainment in the air flowing in the air passageway.

Claim 2

Dependent Claim 176 words

The combination with a carburetor having an air passage; means in the air passage, operable during flow of air through the air passage, to produce a zone in the air passage lower than the normal pressure of air flowing in the air passage, and means defining a passageway for supplying fuel to said zone for entrainment in the air flowing in the air passage, of a sonic generator, comprising: a. means defining a vortex chamber; b. at least one inlet exposed to the air flowing in the air passage and directed tangentially into the vortex chamber to cause a turbulent air vortex in the chamber; c. and an outlet of reduced diameter directed axially from the vortex chamber into the fuel passageway adjacent said reduced pressure zone thereby to intensify the vortex turbulence of the air as it passes through the outlet into the fuel passageway and to cause an intimate and turbulent premixing of air and fuel prior to discharge into said reduced pressure zone for entrainment in the air flowing in the air passageway.

Claim 3

Dependent Claim 58 words

The combination of a carburetor and a sonic generator, as defined in claim 1, which further includes: a. means defining a channel exposed to the air receiving end of the inlet and directed upstream to convert a portion of the air velocity to increased pressure at the inlet thereby to increase flow of air into the vortex chamber.

Claim 4

Dependent Claim 52 words

The combination of a carburetor and a sonic generator, as defined in claim 1, wherein: a. the discharge from the vortex whistle is transverse to the fuel passageway and a reflecting surface is located at the far side of the passageway to intensify the turbulent reaction between the air and the fuel.

Claim 5

Dependent Claim 27 words

A sonic generator, as defined in claim 1, wherein: a. a rotatable mass is located in the vortex chamber to transmit mechanical vibration to the walls thereof.

Claim 6

Dependent Claim 155 words

A means of preparing a fuel-air mixture, comprising: a. a tubular structure forming an air passage; b. a venturi disposed in the air passage and creating a zone of reduced pressure; c. a fuel passage connected to the venturi and subject to the reduced pressure zone to deliver fuel thereto; d. a vortex whistle including a vortex chamber having an inlet exposed to air in the inlet passage and an outlet directed into the fuel passage adjacent its connection with the venturi; e. said vortex whistle being responsive to the pressure differential between its inlet and outlet to divert a portion of the air from the air passage to the fuel passage and generate turbulent vibrations in the diverted air, thereby to produce, with the fuel flowing in the fuel passage, a turbulent fuel-air premixture for delivery to the remaining air in the air passage through the zone of reduced pressure created by the venturi.

Claim 7

Dependent Claim 155 words

A means of preparing a fuel-air mixture, comprising: a. a tubular structure forming an air passage; b. a venturi disposed in the air passage and creating a zone of reduced pressure; c. a fuel passage connected to the venturi and subject to the reduced pressure zone to deliver fuel thereto; d. a vortex whistle including a vortex chamber having an inlet exposed to air in the inlet passage and an outlet directed into the fuel passage adjacent its connection with the venturi; e. said vortex whistle being responsive to the pressure differential between its inlet and outlet to divert a portion of the air from the air passage to the fuel passage and generate turbulent vibrations in the diverted air, thereby to produce, with the fuel flowing in the fuel passage, a turbulent fuel-air premixture for delivery to the remaining air in the air passage through the zone of reduced pressure created by the venturi.

Claim 8

Dependent Claim 26 words

A means, as defined in claim 5, wherein: a. a rotatable mass is located in the vortex chamber to transmit mechanical vibration to the walls thereof.

Claim 9

Dependent Claim 26 words

A means, as defined in claim 6, wherein: a. a second sonic generator is mounted on the venturi to cause mechanical vibration of the walls thereof.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-08-22	1976-02-21	1976-08-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-08-22	1980-02-21	1980-08-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-08-22	1984-02-21	1984-08-22	$7700.00	Window Closed / Lapsed

Means of preparing a fuel-air mixture

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