Carburetor with acceleration fuel pump

Details Carburetor with acceleration fuel pump Carburetor with acceleration fuel pump

2007-02-06

2007-02-06

Chiesa, Richard L. (Department: 1724)

Gas and liquid contact apparatus

Fluid distribution

Pumping

C261S035000

Reexamination Certificate

active

10996962

ABSTRACT:
A combustion engine carburetor with a fuel-and-air mixing passage extending through a body and a float bowl engaged sealably to the body. A vacuum actuated acceleration fuel pump is preferably carried by the float bowl and has a hose-less vacuum channel communicating between the fuel-and-air mixing passage downstream of a throttle valve and a vacuum chamber of the acceleration pump. A hose-less fuel discharge channel communicates between a supplemental fuel chamber of the acceleration pump and the fuel-and-air mixing passage between a venturi and a choke valve in the mixing passage. Preferably, the fuel discharge channel has an injecting bore portion defined by the body and being angled to direct fuel in a downstream direction toward the venturi to promote mixing with air.

REFERENCES:
patent: 2551719 (1951-05-01), Ball
patent: 2660417 (1953-11-01), Anderson
patent: 2768818 (1956-10-01), Egerer
patent: 2775435 (1956-12-01), Kommer
patent: 3017167 (1962-01-01), Griffen
patent: 3404872 (1968-10-01), Nutten
patent: 4076770 (1978-02-01), Saito et al.
patent: 6293524 (2001-09-01), Endo et al.
patent: 6382599 (2002-05-01), Aihara et al.
patent: 6481699 (2002-11-01), Aihara et al.
patent: 2002/0163087 (2002-11-01), Gerhardy
patent: 52-43026 (1977-04-01), None

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