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. 21, 2012
Filed:
Jun. 07, 2004
Teruo Komori, Ibi-gun, JP;
Kazushige Ohno, Ibi-gun, JP;
Sungtae Hong, Ibi-gun, JP;
Yukio Oshimi, Ibi-gun, JP;
Teruo Komori, Ibi-gun, JP;
Kazushige Ohno, Ibi-gun, JP;
Sungtae Hong, Ibi-gun, JP;
Yukio Oshimi, Ibi-gun, JP;
Ibiden Co., Ltd., Ogaki-shi, JP;
Abstract
An object of the present invention is to provide a honeycomb structural body with a long service life, which can reduce a pressure loss to a low level upon collecting particulates and maintain the pressure loss at the low level for a long time even after regenerating processes. The honeycomb structural body includes a columnar porous ceramic block in which a large number of through holes are placed in parallel with one another in the length direction with a wall portion interposed therebetween. Herein, the large number of through holes are constituted by a group of large-capacity through holes, each of which is sealed at one end of the honeycomb structural body so that the total sum of the areas on a cross section perpendicular to the length direction is made relatively great, and a group of small-capacity through holes, each of which is sealed at the other end of the honeycomb structural body so that the total sum of the areas on the cross section is made relatively small, and a surface roughness Rof the wall face of the through hole is set in a range from 10 to 100 μm.