US Patent Issued to ATMUS FILTRATION IP on April 14 for "Filter with variable cross-section axial seal" (Wisconsin Inventor)

ALEXANDRIA, Va., April 15 -- United States Patent no. RE50,860, issued on April 14, was assigned to ATMUS FILTRATION IP INC. (Nashville, Tenn.).

"Filter with variable cross-section axial seal" was invented by Ken Tofsland (Stoughton, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Filtration systems having filter elements having an axial seal member with a variable cross-section are described. The variable cross-section is matched by the non-planar sealing surfaces of the housing and housing cover that receive the filter elements. The non-planar sealing surfaces of the housing and the housing cover prevent proper filtration system function when an unauthorized replacement filter element having a flat axi...