Abstract: Disclosed is an air cleaner a body, a cover detachably provided on a front side of the body and configured to have an intake hole to take air into the body, a filter case disposed between the body and the cover such that a filter is attached to the filter case, and an authorized filter sensor attached to the filter and the filter case to sense whether the filter is authorized, wherein the authorized filter sensor includes a transmitting member attached to a lower end portion of the filter or included in the lower end portion of the filter and a detecting member provided on the filter case to sense the transmitting member and detect a variable electrical property.

Abstract: Disclosed is an air cleaner a body, a cover detachably provided on a front side of the body and configured to have an intake hole to take air into the body, a filter case disposed between the body and the cover such that a filter is attached to the filter case, and an authorized filter sensor attached to the filter and the filter case to sense whether the filter is authorized, wherein the authorized filter sensor includes a transmitting member attached to a lower end portion of the filter or included in the lower end portion of the filter and a detecting member provided on the filter case to sense the transmitting member and detect a variable electrical property.

Abstract: A materials removal assembly for clearing materials from a horizontal surface, such as for removing snow or precipitation from a top surface on a vehicle. The assembly has a beam; a first coupling connected to a first end of the beam; a second coupling connected to the first coupling; and a blade assembly connected to the second coupling. The first coupling permits rotation of the second coupling and the blade assembly above and below a longitudinal axis of the beam. The second coupling permits rotation of the blade assembly about a first vertical axis transverse to the longitudinal axis of the beam. In one embodiment, movement of the materials removal assembly causes rotation of the blade assembly and movement of the materials to a side of the vehicle.