US4740408A
Expired / Lapsed
US
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Ceramic honeycomb body
Assignee: NGK Insulators Ltd
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Filing: 1985-12-02
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Granted: 1988-04-26
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Expires: 2005-12-02
Abstract
Abstract A ceramic honeycomb body has a plurality of through holes defined by partition walls so as to be separated from each other, and fins are integrally formed with selected partition walls so as to extend into the through holes surrounded by such selected partition walls, whereby the cross-sectional area of the through hole is selectively reduced by the fins thus provided.
Inventors
- 👤 Shigeru Mochida
- 👤 Masaru Kojima
- 👤 Jun Kitagawa
- 👤 Koichi Ikeshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:56
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/0006; B; B01; B01D; B01D46/00; B01D46/10; F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2825; F01N3/2828; B01J; B01J35/00; B01J35/50; B01J35/56; F01N2330/00; F01N2330/06; F01N2330/30; F01N2330/38; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24744
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
65 words
A ceramic honeycomb body comprising: a plurality of partition walls forming a plurality of through holes; and a plurality of fins integrally secured to said plurality of partition walls, such that said fins extend into said plurality of through holes only at a central portion of said ceramic honeycomb body and said fins do not meet to form walls to further subdivide said through holes.
Claim 2
Dependent Claim
65 words
A ceramic honeycomb body comprising: a plurality of partition walls forming a plurality of through holes; and a plurality of fins integrally secured to said plurality of partition walls, such that said fins extend into said plurality of through holes only at a central portion of said ceramic honeycomb body and said fins do not meet to form walls to further subdivide said through holes.
Claim 3
Dependent Claim
54 words
The ceramic honeycomb body of claim 1, wherein an open cross-sectional area of said through holes having said fins extending thereinto for permitting a gas to flow therethrough is less than an open cross-sectional area of through holes at a peripheral portion of said ceramic honeycomb body which do not have fins extending thereinto.
Claim 4
Dependent Claim
38 words
The ceramic honeycomb body of claim 1, wherein said plurality of fins extend into said through holes in an amount less than 30% of a diameter of a circle inscribed into each of said plurality of through holes.
Claim 5
Dependent Claim
39 words
The ceramic honeycomb body of claim 3, wherein said through holes have a substantially square cross-section and siad fins extend into said through holes in an amount 20-30% of a length of one side of said square through holes.
Claim 6
Dependent Claim
27 words
The ceramic honeycomb body of claim 3, wherein said through holes have a cross-sectional shape selected from the group consisting of square, triangular, hexagonal, circular and rectangular.
Claim 7
Dependent Claim
41 words
The ceramic honeycomb body of claim 1, wherein said plurality of fins are integrally secured to said partition walls during extrusion of the ceramic honeycomb body and a subsequent sintering thereof and said partition walls and fins are made of cordierite.
Claim 8
Dependent Claim
27 words
The ceramic honeycomb body of claim 1, wherein a thickness of said plurality of fins is substantially equal to a thickness of said plurality of partition walls.
Claim 9
Dependent Claim
39 words
The ceramic honeycomb body of claim 1, wherein said plurality of fins block a cross-sectional area of gaseous flow in said plurality of through holes a different amount to control an amount of gaseous flow through said honeycomb body.
Claim 10
Dependent Claim
113 words
A ceramic honeycomb body for purifying exhaust gases from an engine comprising: a central portion and an outer peripheral portion, each of said central portion and outer peripheral portion being formed by a plurality of partition walls forming a plurality of through holes therein; and a plurality of fins integrally secured to said plurality of partition walls, such that said plurality of fins extend into said plurality of through holes only at said central portion of said ceramic honeycomb body, said fins restricting a flow of exhaust gases in said central portion relative to said outer peripheral portion and said fins do not meet to form walls to further subdivide said through holes.
Claim 11
Dependent Claim
113 words
A ceramic honeycomb body for purifying exhaust gases from an engine comprising: a central portion and an outer peripheral portion, each of said central portion and outer peripheral portion being formed by a plurality of partition walls forming a plurality of through holes therein; and a plurality of fins integrally secured to said plurality of partition walls, such that said plurality of fins extend into said plurality of through holes only at said central portion of said ceramic honeycomb body, said fins restricting a flow of exhaust gases in said central portion relative to said outer peripheral portion and said fins do not meet to form walls to further subdivide said through holes.
Claim 12
Dependent Claim
54 words
The ceramic honeycomb body of claim 9, wherein an open cross-sectional area of said through holes having said fins extending thereinto for permitting a gas to flow therethrough is less than an open cross-sectional area of through holes at a peripheral portion of said ceramic honeycomb body which do not have fins extending thereinto.
Claim 13
Dependent Claim
38 words
The ceramic honeycomb body of claim 9, wherein said plurality of fins extend into said through holes in an amount less than 30% of a diameter of a circle inscribed into each of said plurality of through holes.
Claim 14
Dependent Claim
39 words
The ceramic honeycomb body of claim 11, wherein said through holes have a substantially square cross-section and said fins extend into said through holes in an amount 20-30% of a length of one side of said square through holes.
Claim 15
Dependent Claim
27 words
The ceramic honeycomb body of claim 11, wherein said through holes have a cross-sectional shape selected from the group consisting of square, triangular, hexagonal, circular and rectangular.
Claim 16
Dependent Claim
41 words
The ceramic honeycomb body of claim 9, wherein said plurality of fins are integrally secured to said partition walls during extrusion of the ceramic honeycomb body and a subsequent sintering thereof and said partition walls and fins are made of cordierite.
Claim 17
Dependent Claim
27 words
The ceramic honeycomb body of claim 9, wherein a thickness of said plurality of fins is substantially equal to a thickness of said plurality of partition walls.
Claim 18
Dependent Claim
39 words
The ceramic honeycomb body of claim 9, wherein said plurality of fins block a cross-sectional area of gaseous flow in said plurality of through holes a different amount to control an amount of gaseous flow through said honeycomb body.
Claim 19
Dependent Claim
123 words
A ceramic honeycomb body for purifying exhaust gases from an engine comprising: a central portion and an outer peripheral portion, each of said central portion and outer peripheral portion being formed by a plurality of partition walls forming a plurality of through holes; and a plurality of fins integrally secured to said plurality of partition walls, such that said fins extend into said plurality of through holes only at said central portion of said ceramic honeycomb structural body, said fins providing for a different amount of blockage of exhaust gases which pass through said plurality of through holes at said central portion relative to said outer peripheral portion and said fins do not meet to form walls to further subdivide said through holes.
Claim 20
Dependent Claim
123 words
A ceramic honeycomb body for purifying exhaust gases from an engine comprising: a central portion and an outer peripheral portion, each of said central portion and outer peripheral portion being formed by a plurality of partition walls forming a plurality of through holes; and a plurality of fins integrally secured to said plurality of partition walls, such that said fins extend into said plurality of through holes only at said central portion of said ceramic honeycomb structural body, said fins providing for a different amount of blockage of exhaust gases which pass through said plurality of through holes at said central portion relative to said outer peripheral portion and said fins do not meet to form walls to further subdivide said through holes.
Claim 21
Dependent Claim
38 words
The ceramic honeycomb body of claim 17, wherein said plurality of fins extend into said through holes in an amount less than 30% of a diameter of a circle inscribed into each of said plurality of through holes.
Claim 22
Dependent Claim
39 words
The ceramic honeycomb body of claim 18, wherein said through holes have a substantially square cross-section and said fins extend into said through holes in an amount 20-30% of a length of one side of said square through holes.
Claim 23
Dependent Claim
27 words
The ceramic honeycomb body of claim 18, wherein said through holes have a cross-sectional shape selected from the group consisting of square, triangular, hexagonal, circular and rectangular.
Claim 24
Dependent Claim
41 words
The ceramic honeycomb body of claim 17, wherein said plurality of fins are integrally secured to said partition walls during extrusion of the ceramic honeycomb body and a subsequent sintering thereof and said partition walls and fins are made of cordierite.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |