F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
123/54
F02M 19/10 (2006.01) F02M 9/10 (2006.01) F02M 17/10 (2006.01)
Patent
CA 1104011
A B S T R A C T An improved variable venturi carburetor including one or more improved features such as one or more air valve(s) comprising fuel discharge arifices, upstream of one or more throttle valve(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 arm ramp gap resulting from differential expansion; composite con- struction of the arm and ramp hangar of materials with 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 facili- tate provision of bearing structure for the aforesaid elements in the body of the carburetor while reducing the proportion of carburetor throat area taken up by the shafting arrangements; and other improvements.
318568
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