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:
May. 11, 1999
Filed:
Apr. 26, 1996
Joseph C Tokar, Apple Valley, MN (US);
Gary R Gillingham, Prior Lake, MN (US);
Wayne M Wagner, Apple Valley, MN (US);
Daniel T Risch, Burnsville, MN (US);
Jim C Rothman, Burnsville, MN (US);
Fred H Wahlquist, Bloomington, MN (US);
Edward A Steinbrueck, Eden Prairie, MN (US);
Steven A Carter, Eagan, MN (US);
Donaldson Company, Inc., Minneapolis, MN (US);
Abstract
A conical filter device inserts into a duct having flow passing from upstream to downstream. The filter device includes fluted filter media having flutes formed therein and a housing. The filter forms a seal between the outer edge of the filter at the downstream side and the housing. The upstream face of the filter is conical shaped in a first embodiment and frusto-conical in a second embodiment with the housing roughly corresponding to the shape of the filter. The filter elements are formed by winding layers of filter media to form a circular cross-section. The elements are moved axially as they are wound or placed on a shaping form while the sealant is still pliable to shape the element.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile