Self-lift carburetor

Details Self-lift carburetor Self-lift carburetor

1977-05-13

1979-02-13

Miles, Tim R.

Gas and liquid contact apparatus

Fluid distribution

Pumping

261DIG68, 261 69A, F02M 1704

Patent

active

041395808

ABSTRACT:
A small carburetor for chain saws and the like which needs no fuel pump. A spring-biased diaphragm has a radically higher bias than is normal and controls a fuel inlet valve open to the tank such that a higher vacuum is needed to open the valve, thus providing the necessary pull to draw fuel from a tank in any position relative to the fuel tank whether below, above, or to the side of the carburetor. An on-off check valve is interposed between the diaphragm fuel chamber and the main fuel orifice to insure constant negative pressures in the diaphragm chamber. The carburetor body, molded from plastic, has a composite jet insert and plug-in connection to the engine.

REFERENCES:
patent: 1804659 (1931-05-01), Tice
patent: 2396031 (1946-03-01), Udale et al.
patent: 3104617 (1963-09-01), Barr
patent: 3151627 (1964-10-01), Rice
patent: 3241822 (1966-03-01), Degenhardt
patent: 3253822 (1966-05-01), Arndt et al.
patent: 3253822 (1966-05-01), Arndt et al.
patent: 3254880 (1966-06-01), Phillips
patent: 3256869 (1966-06-01), Nutten et al.
patent: 3738623 (1973-07-01), Tuckey

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