Patent ID: 8235021

Claim:
A device for supply of an internal combustion engine ( 1 ), comprising a carburettor ( 72 ) and an air filter ( 71 ) fitted on an intake line ( 70 ), through which intake line ( 70 ) air filtered by an air filter ( 71 ) is conveyed into a carburettor ( 72 ), and an anti-backflow element ( 8 ) located in series on the intake line ( 70 ) between the carburettor ( 72 ) and the air filter ( 71 ), wherein the anti-backflow element ( 8 ) exhibits an external casing ( 80 ) comprising a perimetral band ( 81 ) exhibiting at least a portion of substantially circular development closed by two side walls ( 82 , 83 ), such as to internally define at least a compartment ( 84 ), which has an invariable geometry and which is in communication with the carburettor ( 72 ) through a duct ( 85 ) opening in the perimetral band ( 81 ) and extending tangentially relative to the portion of circular development; the compartment ( 84 ) also being in communication with the air filter ( 71 ) through at least a first duct ( 86 ) opening in one of the two side walls ( 82 , 83 ).