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:
Feb. 09, 2010
Filed:
Sep. 13, 2007
Hirofumi Sakamoto, Chita-gun, JP;
Hirofumi Sakamoto, Chita-gun, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A honeycomb structure useful as exhaust gas trapping filter, particularly, as a diesel particulate filter (DPF) for trapping particulate matter, etc. in diesel engine exhaust gas and capable of effectively inhibiting defects such as cracks due to thermal stress, by reducing influence of thermal stress generated upon use or regeneration. The honeycomb structure includes: an integrally joined body constituted of plural honeycomb segments at joint faces with a bonding material layer, and an outer peripheral coat layer. Thickness of the bonding material layer satisfies the relation: (T)=(1.2 to 10.0)×(T) between an average thickness (T) at positions (X) and (X) located at the both ends in the central axis direction of segments and a maximum thickness (T) between positions (Y) and (Y) apart from respective ends in 3 to 40% of the whole length of the honeycomb segment.