Patent ID: 8900339

Claim:
A filter for filtering particles from air or fluid, the filter comprising: a first end and a second end, wherein the first end comprises an aperture; one or more sections of pleated filter media comprising a plurality of pleats formed in a substantially conical shape about an axis and around an inner void region in communication with the aperture, wherein a diameter associated with the first end aperture is greater than a diameter associated with the second end; and one or more radial support regions in circumferential contact with at least one of an outer surface of the filter media, wherein spacing of at least some of the plurality of pleats are maintained at least in part by the one or more radial support regions; wherein the one or more sections of pleated filter media comprises a first filter section joined with a second filter section, wherein the first filter section comprises pleated filter media with a first uncompressed linear pleating period, and wherein the second filter section comprises pleated filter media with a second uncompressed linear pleating period, wherein the first uncompressed linear pleating period is smaller than the second uncompressed linear pleating period.