Patent · US Active

Asymmetric honeycomb wall-flow filter having improved structural strength

US7601194B2 · kind B2 · utility

22Cited by

20References

16Claims

0Family size

Assignee

CORNING INCORPORATED · US

Inventors

Douglas Munroe Beall · Corning, US
Rodney I. Frost · Corning, US
Weiguo Miao · Corning, US

Key dates

Filing date	Mar 24, 2005
Grant date	Oct 13, 2009
Priority date	—
Expiry date	Jul 26, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24149
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A honeycomb filter includes an array of interconnecting porous walls which define an array of first channels and second channels. The first channels are bordered on their sides by the second channels and have a larger hydraulic diameter than the second channels. The first channels have a square cross-section, with corners of the first channels having a shape, such as a bevel or fillet, such that the thickness, t3, of the porous walls adjoining the corners of the first channels is comparable to the thickness, t4, of the porous walls adjoining edges of the first and second channels. Embodiments having a corner fillet with a radius, Rc, are also disclosed. Embodiments wherein 0.30 t4≦Rc≦1.0 t4 exhibit combinations of low wall pressure drop and low thermal stress.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.