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:
Jul. 17, 2007
Filed:
Feb. 25, 2003
Shinichi Miwa, Tajimi, JP;
Yukio Miyairi, Nagoya, JP;
Shigeharu Hashimoto, Okazaki, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A honeycomb filter of the present invention is a honeycomb filterincluding a number of through-holessurrounded by partition walls and extending through an axial direction, in which the partition walls have filterability, predetermined through-holesare plugged at one end portion, and the remaining through-holesare plugged at the other end portion to trap particulate matter contained in a dust-containing fluid. The honeycomb filter is characterized in that a heat capacity of a central partis set to be larger than that of a peripheral partin a section of the honeycomb filterperpendicular to the axial direction. There is provided a honeycomb filter in which a crack is not generated by thermal stress during use, especially at a regeneration time and which is superior in durability.