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:
Feb. 08, 2005
Filed:
May. 28, 2002
Wayne R W Bishop, St. Louis Park, MN (US);
William Michael Juliar, Coon Rapids, MN (US);
Jian Xu, Maple Grove, MN (US);
Steven Scott Gieseke, Richfield, MN (US);
Wayne R W Bishop, St. Louis Park, MN (US);
William Michael Juliar, Coon Rapids, MN (US);
Jian Xu, Maple Grove, MN (US);
Steven Scott Gieseke, Richfield, MN (US);
Donaldson Company, Inc., Minneapolis, MN (US);
Abstract
A core construction for use in a filter element includes a tubular member having a wall with opposite first and second ends. The first end is adaptable for engagement with structure, such as a frame utilized with a filter element. The second end is also engageable with external structure, such as a handle. Preferably, a filter element is constructed by rolling a media construction around the core construction. The media construction includes a corrugated sheet secured to a flat sheet rolled around the core construction into a coiled construction. The coiled construction has inlet flutes and outlet flutes. Methods for using and assembling filter elements preferably use core constructions as described herein.