Gas and liquid contact apparatus – Fluid distribution – Valved
Patent
1981-04-27
1987-04-07
Miles, Tim
Gas and liquid contact apparatus
Fluid distribution
Valved
261 44F, 261 65, F02M 908
Patent
active
046559760
ABSTRACT:
An improved variable venturi carburetor including one or more improved features such as one or more air valve(s) comprising fuel discharge orifices, upstream of one or more throttle(s); backfire protection means in the air valve(s); layered construction of the air valve(s); overhead biasing means for the air valve(s), with or without related air valve(s) positioning means which may, for instance, assist in enrichment of the fuel air mixture during starting; an arm and ramp fuel metering arrangement interconnected, preferably directly, with an internal bore on a shaft which supports the air valve(s) means for rotation, through which the fuel may be directed from the pickup arm to the discharge orifices in or on the air valve means; ball valve means in the end of the pickup arm bearing against the ramp to assist in minimizing deviations in the fuel/discharge gap resulting from differential expansion; composite construction of the arm and ramp hanger of materials which coefficients of expansion selected to minimize gap changes resulting from temperature changes; various arrangements for fuel enrichment; improved throttle configurations; spatial configurations of shaft means for the air valve(s) and throttle(s) which facilitate provision of bearing structure for the aforesaid elements in the body of the carburetor while reducing the production of carburetor throat area taken up by the shafting arrangements; and other improvements.
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