Patent ID: 8677978

Claim:
A system for venting fuel vapors from a fuel tank of an internal combustion engine, the system comprising: a coupling device having first, second and third ports that are all connected with one another internally at a junction within the coupling device, a filter in communication with the third port, wherein the first port is configured to be at least indirectly coupled to the fuel tank, wherein the second port is configured to be at least indirectly coupled to a carburetor, and wherein the third port is in communication with an outside environment via the filter; and an obstruction that is formed at a location downstream of the junction en route from the junction toward the carburetor, the location being either within the coupling device or at a position downstream of the coupling device, wherein the coupling device is configured to allow at least some of the fuel vapors to proceed from the fuel tank to the carburetor and wherein at least some air from the outside environment is able to proceed via the filter into the third port and subsequently toward the fuel tank.