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:
Apr. 23, 1985
Filed:
Nov. 16, 1982
Applicant:
Inventors:
Mervin E Wright, Apple Valley, MN (US);
Donald D Gronholz, Minneapolis, MN (US);
Assignee:
Donaldson Company, Inc., Minneapolis, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
210445 ; 210450 ; 210451 ; 2104935 ; 210495 ; 55497 ; 55502 ; 55524 ; 156202 ;
Abstract
A filter assembly (10) includes a frame (10 and 12) and means (10, 32, 34, 36, 38, 44, 48, and 50) releasably retaining a replaceable pleated filter element (14) therein. The edges of the pleats (68) of the filter element (14) are folded over diagonal fold lines (70) and tucked between adjacent pleats in a manner which provides control expansibility and substantially even pleat spacing upon expansion after storage in collapsed condition.