Patent ID: 7282077
Filing Date: 2007-10-16
Classification: F02M,Y10S

Abstract:
1. An air cleaner comprising: a first housing portion including a non-circular attachment fit; a second housing portion attached to the first housing portion to define a filter space; and a filter element including a non-circular filter aperture having a perimeter, the perimeter engageable with the attachment fit, the attachment fit and the filter aperture sized to provide substantially equal contact pressure around the perimeter when the perimeter is engaged with the attachment fit, wherein the attachment fit is a substantially oval protrusion that has two protrusion end portions and two protrusion side portions, and wherein the filter perimeter is substantially oval and defines two perimeter end portions and two perimeter side portions, and wherein the protrusion side portions and the perimeter side portions cooperate to define a first interference, and wherein the protrusion end portions and the perimeter end portions cooperate to define a second interference different from the first interference.