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. 21, 2012
Filed:
Dec. 21, 2004
Angelo Schiavon, Possio Rusco, IT;
Mauro Cantoni, Mantova, IT;
Andrey Zanettin, Ostiglia, IT;
Claudio Formica, Pomponesco, IT;
Angelo Schiavon, Possio Rusco, IT;
Mauro Cantoni, Mantova, IT;
Andrey Zanettin, Ostiglia, IT;
Claudio Formica, Pomponesco, IT;
Donaldson Company, Inc., Minneapolis, MN (US);
Abstract
A liquid filter assembly is provided. The preferred assembly includes a serviceable filter cartridge having a primary filter section and a secondary or bypass filter section. The preferred assembly includes a bypass valve arrangement and a suction filter arrangement. The suction filter arrangement preferably includes a dimensionally biased valve arrangement, preferably one which is devoid of a helical coiled spring, to control flow through the suction filter. A flow/pressure regulation valve, to allow flow from an interior of the assembly to a reservoir if needed, is preferably provided. Preferred serviceable filter cartridges are shown.