公开(公告)号：US06598749B2

公开(公告)日：2003-07-29

申请号：US09950861

申请日：2001-09-12

Applicant: C. Thomas Paul ,  Scott D. Wofsy

Inventor： C. Thomas Paul ,  Scott D. Wofsy

IPC: B01D2706

CPC classification number: B01D29/21 ,  B01D29/58 ,  B01D2201/0407 ,  B01D2201/122 ,  B01D2201/188

Abstract: A filter is disclosed that includes a cylindrical filter element having a longitudinal axis, an outer periphery, an inner periphery, and a plurality of longitudinal pleats arranged in a spiral configuration in close proximity to one another. Each of the pleats has a pair of legs, and the legs of each pleat are joined to one another at a root. The roots of adjacent pleats are radially spaced from one another about the inner periphery of the filter element.