Patent ID: 6866056
Filing Date: 2005-03-15
Classification: B60K,B63B,B65D,F16K,Y10S,Y10T

Abstract:
1. A method of venting air to a fuel tank without allowing fuel vapors to escape to the atmosphere, comprising the steps of: providing a fuel cap having a valve cavity in a bottom thereof, forming at least one flow passage through said fuel cap to said valve cavity; inserting a diaphragm into said valve cavity; and inserting a vent disc into a bottom of said fuel cap, said vent disc including a diaphragm projection, forming at least one air passage through said vent disc, a moveable outer perimeter of said diaphragm sealing a bottom of said valve cavity, a vacuum in the fuel tank unsealing said diaphragm to provide air flow to the fuel tank through said at least one flow passage and said at least one air passage.