Patent ID: 7485168
Filing Date: 2009-02-03
Classification: B60H,F04D

Abstract:
1. An air filter assembly comprising: an air filter extending along a central axis from a first end to a second end and decreasing in width along said central axis from said first end to said second end; a filter housing partially enclosing said air filter and defining an aperture adjacent to said second end; and at least one valve member rotatable about a rotation axis to pivot around said second end and selectively block at least a portion of said aperture; wherein said at least one valve member is further defined as an arcuate rigid panel; wherein said rotation axis intersects said central axis, wherein said at least one valve member is further defined as being operable to block at least substantially half of said aperture wherein said air filter is further defined as being one of conical, frusto-conical, semi-spherical, and frusto-spherical.