Apparatus for venting fuel vapors

Details Apparatus for venting fuel vapors Apparatus for venting fuel vapors

F - Mech Eng,Light,Heat,Weapons

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F02M 33/02 (2006.01) F02M 5/08 (2006.01) F02M 25/08 (2006.01)

Patent

CA 1096720

8765 APPARATUS FOR VENTING FUEL VAPORS Harvey L. Ruth Larry J. Tipton Abstract of the Disclosure Apparatus for venting fuel vapors present in the fuel bowl of a carburetor for an internal combustion engine comprises a bowl vent through which fuel vapors discharge when the vent is open. A valve opens and closes the vent. A biasing force is exerted on the valve to close the vent. In response to starting of the engine first and second opening forces are exerted on the valve; these forces being sufficient to overcome the biasing force exerted thereon and open the vent. Each vent opening force is independently sufficient to open the vent and the vent is open when the engine is running even if one of the first and second forces is not exerted on the valve or is insufficient to open the valve.

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