Carburetor air-fuel mixture adjustment assembly

Details Carburetor air-fuel mixture adjustment assembly Carburetor air-fuel mixture adjustment assembly

2006-07-04

2006-07-04

Chiesa, Richard L. (Department: 1724)

Gas and liquid contact apparatus

Fluid distribution

Valved

C137S382000, C261S044800, C261S071000, C261SDIG038, C261SDIG084

Reexamination Certificate

active

07070173

ABSTRACT:
An apparatus for adjusting the air-fuel ratio of a fuel mixture to be supplied to an engine. The apparatus has a pair of needle valve bodies and a pair of receptacles formed in a main body of a carburetor for receiving the needle valve bodies. Each needle valve body has a needle and a head. The needles are axially movable relative to a respective needle orifice. The needles may be axially advanced and retracted by rotating the needle valve bodies within the receptacles to respectively decrease and increase the flow of the fuel mixture around the needles and through the orifices. To prevent tampering with the needle valve body setting, the head of the needle valve body has an unconventional shape requiring a specialized tool to rotatably adjust the needle valve body. To further prevent tampering, the head is recessed with the main body of the carburetor. A retainer is disposed in the main body of the carburetor and receives the needle valve bodies to facilitate maintaining alignment of the needle valve bodies relative to the receptacles. The retainer assures that a constant fuel calibration setting is maintained through the orifices by resisting displacement of the needles due to such factors as external forces applied to the head of the needle valve body or engine vibration.

REFERENCES:
patent: 3469825 (1969-09-01), DuBois
patent: 4097561 (1978-06-01), Seki et al.
patent: 4234524 (1980-11-01), Arai
patent: 4271093 (1981-06-01), Kobayashi
patent: 4271095 (1981-06-01), Maeda
patent: 4283353 (1981-08-01), Miller
patent: 4481153 (1984-11-01), Kobayashi et al.
patent: 4568499 (1986-02-01), Wood
patent: 4759883 (1988-07-01), Woody et al.
patent: 5262092 (1993-11-01), Reeder et al.
patent: 5322645 (1994-06-01), Hammett et al.
patent: 5707561 (1998-01-01), Swanson
patent: 5709822 (1998-01-01), Togashi
patent: 5753148 (1998-05-01), King et al.
patent: 5776379 (1998-07-01), Bowles
patent: 5961896 (1999-10-01), Koizumi et al.
patent: 6003845 (1999-12-01), Kus
patent: 6234458 (2001-05-01), Gerhardy
patent: 6273403 (2001-08-01), Kahlhamer
patent: 6302384 (2001-10-01), Douyama
patent: 6402124 (2002-06-01), Pattullo et al.
patent: 6769670 (2004-08-01), Ohgane et al.
patent: 6945520 (2005-09-01), Ohgane et al.
patent: 2004/0007788 (2004-01-01), Vimercati
patent: 9-158783 (1997-06-01), None
patent: 9158783 (1997-06-01), None

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