The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2002
Filed:
Jul. 13, 2001
Jeffrey S. Morgan, Stoughton, WI (US);
Jon S. Wake, Verona, WI (US);
Kent J. Kallsen, Madison, WI (US);
Nelson Industries, Inc., Stoughton, WI (US);
Abstract
A filter element ( ) includes pleated filter media ( ) having a plurality of pleats ( ) in a closed annular loop having an outer perimeter ( ) defined by a plurality of outer pleat tips ( ), an inner perimeter ( ) defined by a plurality of inner pleat tips ( ), the loop having a hollow interior ( ) extending along an axis ( ), wherein fluid to be filtered flows laterally through the filter media and flows axially in the hollow interior ( ). The filter element has an axial flow passage ( ) along the axis ( ) and circumscribing the hollow interior ( ) and has a flow perimeter ( ) greater than the inner perimeter ( ) of the filter element defined by the inner pleat tips ( ), and in the preferred embodiment substantially the same as the outer perimeter ( ) defined by the outer pleat tips ( ), to provide axial flow ( ) through the hollow interior ( ) and additional axial flow ( and ) through the axial ends ( ) of the pleats.