Core member for catalytic oxidation converter

Claim 2

A core member in accordance with claim 1 and in which said plurality of patterns of said passages comprises two of such patterns.

Claim 3

A core member in accordance with claim 2 and in which said plurality of patterns of said passages comprises two of such patterns.

Claim 4

A core member in accordance with claim 1 and in which the cross-sectional areas of said passages are square.

Claim 5

A core member in accordance with claim 2 and in which the cross-sectional areas of said passages are square.

Claim 6

A core member in accordance with claim 3 and in which the cross-sectional areas of said passages are square.

Claim 7

A core member in accordance with claim 4 and in which the cross-sectional areas of said passages are square.

Claim 8

A core member for use in a catalytic oxidation converter for internal combustion engine exhaust gases, such member comprising a cylindrical body of a refractory material having planar ends and embodying a multitude of passages of relatively minute areal cross-sections extending therethrough generally normal to said planar ends, such multitude of passages being cross-sectionally defined by networks of relatively thin and linearly discontinuous walls in the directions of the cross-sectional planes of said body, and the multitude comprising; A. a generally hexagonal cross-sectional pattern of a plurality of hexagonal groups of similar passages with each such group geometrically congruent in areal cross-section with each of the other groups of said pattern and said groups each having six passages each, such pattern extending axially through the center of said cylindrical body; B. a first generally annular cross-sectional pattern of a plurality of hexagonal groups of similar passages with each such group, in overall areal cross-section, geometrically congruent with each of the other groups of such pattern and with each of said groups of said hexagonal pattern, each of such groups of the annular pattern having four passages each, such annular pattern extending longitudinally through said cylindrical body in a surrounding relationship with said hexagonal pattern; C. a second generally annular cross-sectional pattern of a plurality of hexagonal groups of similar passages with each of such groups having three passages each, and with such pattern geometrically similar in overall areal cross-section with said first annular pattern and with each group of passages of such second pattern geometrically congruent in overall areal cross-section with each of the other such groups of such pattern and with each of said groups of said hexagonal and said first annular patterns, such second annular pattern extending longitudinally through said cylindrical body in a surrounding relationship with said first annular pattern; D. a third generally annular cross-sectional pattern of groups of similar passages with each of such groups having two passages each, such pattern being similar to said second annular pattern and extending longitudinally through said cylindrical body in a surrounding relationship with such second annular pattern; and E. a fourth generally annular cross-sectional pattern of passages extending through said cylindrical body in a surrounding relationship with said third annular pattern and with such fourth pattern extending to and including the peripheral wall of said cylindrical body, each of said passages of the fourth annular pattern being at least partly geometrically congruent in areal cross-section with each of the groups of passages of the previously mentioned patterns of such groups thereof.

Claim 9

A core member in accordance with claim 9 and further including an oxidation catalyst material deposited on said networks of walls defining said multitude of passages.