Honeycomb filter

Details Honeycomb filter Honeycomb filter

2007-02-20

2007-02-20

McNeil, Jennifer (Department: 1775)

Stock material or miscellaneous articles

Structurally defined web or sheet

Honeycomb-like

C428S593000

Reexamination Certificate

active

10491163

ABSTRACT:
A honeycomb filter1is constituted by integrating a plurality of honeycomb segments12including a large number of through channels3partitioned by partition walls2and extending through an axial direction. The honeycomb filter1is characterized in that a thermal conductivity, strength, or strength/Young's modulus ratio of a honeycomb segment12Idisposed in a central portion is high, or a porosity, average pore diameter, or (porosity×(average pore diameter)2) of a wall portion is small with respect to a honeycomb segment12Odisposed in an outer peripheral portion. The honeycomb filter is used in a filter or the like for capturing particulates in an exhaust gas, superior in regeneration efficiency, and capable of simultaneously achieving durability and low pressure loss.

REFERENCES:
patent: 3505158 (1970-04-01), Murray
patent: 4335783 (1982-06-01), McBrayer et al.
patent: 5914187 (1999-06-01), Naruse et al.
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patent: B2 61-51240 (1986-11-01), None
patent: A 01-145377 (1989-06-01), None
patent: A 08-028246 (1996-01-01), None
patent: A 2000-233979 (2000-08-01), None
patent: A 2001-162177 (2001-06-01), None
Translation of JP 01-145377).
Gulati, “Strength and Thermal Shock Resistance of Segmented Wall-Flow Diesel Filters,” SAE Technical Paper Series, 86008, pp. 11-18, 1986.

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