Patent ID: 7186282

Claim:
A motor vehicle air cleaner comprising: an upper cap having an inflow chamber, said inflow chamber being provided with an air intake passage; a lower cap engaged with said upper cap and having an outflow chamber; a first filter element arranged between said inflow chamber of said upper cap and said outflow chamber of said lower cap, said outflow chamber having an outtake passage; and a drainage mechanism provided to a bottom of said upper cap, said drainage mechanism having a flannel member and a check valve mechanism fitted into said funnel member, said check valve mechanism being a hollow member made of rubber and having a top end provided with two flanges engaged with an outlet of said lower cap, said check valve mechanism having a lower end which reduces into a slim and flushed drain, a second filter element fitted in said check valve mechanism, said funnel member having a lower end provided with a ventilation port; whereby when in operation, said outflow chamber is in a negative pressure status to create a suction force to close up said drain thereby preventing water vapor or dust from being sucked into said outflow chamber through said drain, and when not in operation, pressure inside said outflow chamber is equal to ambient pressure to leave said drain open thereby enabling water and vapor to be discharged into said funnel member.