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:
Dec. 25, 2007
Filed:
Oct. 14, 2004
Daniel Eric Adamek, Bloomington, MN (US);
Michael Jon Gustafson, St. Bonifacius, MN (US);
Jarren B. Mills, Apple Valley, MN (US);
Kirk A. Schnieder, Eden Prairie, MN (US);
Marilyn D. Welch, Burnsville, MN (US);
Daniel Eric Adamek, Bloomington, MN (US);
Michael Jon Gustafson, St. Bonifacius, MN (US);
Jarren B. Mills, Apple Valley, MN (US);
Kirk A. Schnieder, Eden Prairie, MN (US);
Marilyn D. Welch, Burnsville, MN (US);
Donaldson Company, Inc., Minneapolis, MN (US);
Abstract
A generally cylindrical filter element incorporating nonsymmetrical or asymmetrical V-pleated media. The V-pleated media provides increased filter media per given filter volume, extended filter life, and a smaller filter for equivalent filter life. A smaller filter is generally beneficial for some applications such as aircraft, due to its lower weight. Various features of the filter include asymmetric variable pleat heights applied to a cylindrical or obround filter; defined pleat spacing applied to a variable pleat height element; optimal pleat density; and optimal shape of inlet and outlet.