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:
Aug. 09, 1994
Filed:
Apr. 20, 1990
Applicant:
Inventors:
Yuan-Ming Tang, New Brighton, MN (US);
Gregory H Stephan, Stillwater, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210232 ; 210484 ; 21049701 ; 55500 ; 55502 ;
Abstract
A filter cartridge is provided with an end cap and a lock ring which capture a filter element therebetween on assembly and which include projections extending beyond the outer surfaces of the end cap and the lock ring. The application of heat to the projections causes the material of the projections to fuse together and provide a leak-proof seal between the end cap, the lock ring and the filter material.