Air-filter assembly

Claim 1

An air filter assembly for connecting to a pipe member of a control valve of an exhaust emission cleaning system, comprising: a filter case having an air filter therein and having a communicating hole connected to said pipe member; a filter cap coupled with said filter case, wherein said filter case and said filter cap are made of elastic material and formed integrally with each other via at least one connecting member; a projection vertically extending from the bottom of said filter case wherein said communicating hole comprises an inner, small diameter opening provided at the top of said projection, said projection including an inner conical surface portion connected to said small diameter opening, at least one longitudinal recess extending from the top of said projection towards said bottom of said filter case, and a transverse groove formed in said projection and cooperable with said pipe member so as to facilitate connection of said filter case to said pipe member; air inlet means formed in either said filter case or said filter cap on opposite side portions of said projection; projecting means provided on said filter case wherein said filter cap is coupled with said filter case by connection with said projecting means; at least one connecting member, including an aperture for said projecting means, formed integrally with said filter case and said filter cap wherein said filter case is coupled to said cap by said at least one connecting member; and a rib portion provided on said filter cap to hold said air filter, whereby said air filter can be simply and quickly assembled and replaced.