Device for reducing evaporation loss from carburetors and fuel t

Details Device for reducing evaporation loss from carburetors and fuel t Device for reducing evaporation loss from carburetors and fuel t

1982-04-12

1983-11-22

Mancene, Gene

Harvesters

Motorized harvester

Having motor on ground-supported carrier

220202, 220 85VS, 123516, A01D 3500, B65D 5116

Patent

active

044161085

ABSTRACT:
A lawn mower is illustrated as including a carburetor having a float bowl adapted to contain a vent assembly for selectively venting the air space of the carburetor float bowl to the atmosphere when the internal combustion engine of the lawn mower is running and for precluding evaporation of fuel from the air space when the engine is not running. The lawn mower fuel tank also includes a vent assembly for selectively venting the fuel tank to the atmosphere when the internal combustion engine is running and for precluding evaporation of fuel from the fuel tank into the atmosphere when the engine is not running. Each vent assembly includes a valve member resting on a valve seat and supported for movement in response to vibration of the engine and in such a manner that the valve member will return to its position on the valve seat when the engine is shut off.

REFERENCES:
patent: 2145739 (1939-01-01), Shaw
patent: 2964029 (1960-12-01), Tirloni
patent: 3302658 (1967-02-01), De Frees
patent: 3640257 (1972-02-01), Cornelius
patent: 3687335 (1972-08-01), Hunter
patent: 3771690 (1973-11-01), Hunter
patent: 4028075 (1977-06-01), Roberge
patent: 4162021 (1979-07-01), Crute
patent: 4211058 (1980-07-01), Larsen
patent: 4326370 (1982-04-01), Thourd

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