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:
May. 25, 1993
Filed:
Jul. 08, 1991
Masatoshi Shimoda, Hino, JP;
Hino Jidosha Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
The backwash type particulate filter according to the present invention is constituted by a gas permeable ceramic filter with a plurality of bores, the one ends of which open to gas inlet ports and the other ends of which open to gas outlet ports and the inner surfaces of the bores being used for filtration surfaces, and a NOx catalyst carried on the outer surface of the ceramic filter. Accordingly, the NOx catalyst is isolated from the influence of heat caused by burning the soot in the exhaust gas from a diesel engine collected on the filtration surfaces, thereby maintaining its catalytic function for a long time. The soot in the exhaust gas is effectively removed with the ceramic filter and the hazardous gas components in the exhaust gas with the NOx catalyst, respectively.