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. 14, 1981
Filed:
Mar. 16, 1979
Applicant:
Inventor:
Bruce M Sullivan, Burnsville, MN (US);
Assignee:
Donaldson Company, Inc., Minneapolis, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
55 96 ; 55337 ; 55428 ; 55482 ; 55497 ; 55502 ; 55507 ; 277143 ; 277152 ;
Abstract
An improved cylindrical two-stage air cleaner in which the overall efficiency of the cleaner is improved by changing the configuration of filtering means therein from a cylindrical one to a conical one, and in which improved structure is included for sealing the cleaner to prevent passage of incoming air to the outlet without being cleaned, and to automatically scrape particulate matter from the inside of the cleaner housing each time a principal filter is changed.