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:
Oct. 25, 1994
Filed:
Mar. 23, 1993
Applicant:
Inventors:
Gary R Gillingham, Prior Lake, MN (US);
Marty A Barris, Lakeville, MN (US);
Charles O Reinhart, Minneapolis, MN (US);
Julian A Imes, Jr, Bloomington, MN (US);
Erland D Anderson, Farmington, MN (US);
Peter A Betts, Prior Lake, MN (US);
Assignee:
Donaldson Company, Inc., Minneapolis, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60288 ; 60286 ; 60295 ; 60311 ; 55314 ; 55466 ; 55DI / ;
Abstract
Trap muffler apparatus with bypass around a trap core is disclosed. A preferred bypass arrangement utilizing a tubular shutter valve system is described. Forward or reverse regeneration are possible. Bypass to atmosphere without filtration is avoided with dual in-line traps or with the segmented trap and control of exhaust gases to traps not being regenerated.