# US 4,396,664 A · Ceramic honeycomb structural body

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- Number: US 4,396,664 A
- Document ID: US4396664A
- Status: Granted
- Kind: A
- Application number: 06/262,941
- Filed: 1981-05-12
- Granted: 1983-08-02
- Earliest claimed: 1980-05-20
- Assignees: NGK Insulators, Ltd.
- Inventors: Shigeru Mochida; Masaru Kojima; Toshihiko Hijikata
- Web page: https://patentgrep.com/patent/US4396664A

## CPC

- F01N 3/2853: {using mats or gaskets between catalyst body and housing}
- F01N 3/2867: {the mats or gaskets being placed at the front or end face of catalyst body}
- Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y10T 428/24149: Honeycomb-like
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A ceramic honeycomb structural body to be used in an automobile monolith catalyst converter in which the ceramic honeycomb structural body having numerous parallel channels are clamped by annular supporting members perpendicular to axis of said channels has such a structure that end surfaces of the ceramic honeycomb structural body are more strongly clamped at an inner circumferential portion of the above described annular supporting members than at the outer circumferential portion of said annular supporting members. Such a ceramic honeycomb structural body is stably held in the catalyst converter without forming break at the peripheral portion of the end surface of the honeycomb structural body.

## Claims

### Claim 1

A monolithic catalyic converter, comprising:
a housing;
a ceramic, honeycomb structural body disposed within said housing, said body having two end surfaces and a plurality of channels extending through the body between the end surfaces, each of said end surfaces having an inner circumferential portion and an outer circumferential portion contiguous with and extending radially outwardly from the inner circumferential portion;
a plurality of annular supports within said housing for contacting each of the end surfaces of said structural body; substantially perpendicular to the axis of said parallel channels:
clamping means for applying pressure to said annular supports to clamp said end surfaces, each of said outer circumferential portions having a first portion contiguous with said inner circumferential portion and having a surface parallel to and abutting one of said annular supports, and a second portion radially outward of said first portion having a surface which is not parallel to said support and which is spaced from said supports, the pressure applied to said first portion being greater than the pressure applied to said second portion.