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. 17, 1999
Filed:
Oct. 16, 1997
Hidetoshi Saito, Itami, JP;
Katsuhiko Yoro, Itami, JP;
Shiro Nakajima, Itami, JP;
Noboru Yamasaki, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
An exhaust gas purifier which can regenerate its trapper for trapping particulate matter (PM) in exhaust over the entire area of its filter portion, even if a large amount of PM is trapped. PM trapped on the trapper is burned by heating the trapper with an electric heater inserted in the trapper on its downstream side. With this arrangement, PM is less likely to accumulate between the electric heater and the trapper. Also, PM is less likely to adhere to the surface of heater supporting insulators. Thus, it is possible to prevent short-circuiting between the heater and the trapper through PM.