# US 2014/0360016 A1 · Method of Manufacturing an Exhaust Gas Carrying Device and Tool Therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0360016 A1 - Document ID: US20140360016A1 - Status: Published application - Kind: A1 - Application number: 14/469,638 - Filed: 2014-08-27 - Published: 2014-12-11 - Earliest claimed: 2008-09-10 - Assignees: Faurecia Emissions Control Technologies, Germany GmbH - Applicants: Faurecia Emissions Control Technologies, Germany GmbH - Inventors: Stefan Keller; Stefan Meischkoetter; Otto Steinhauser; Manfred Stiglmaier - Web page: https://patentgrep.com/patent/US20140360016A1 ## CPC - F01N 3/28: Construction of catalytic reactors - B21D 17/02: by pressing (grooving or notching of bolts, studs, or the like B21K1/54) - B21D 39/04: of tubes with tubes; of tubes with rods {(crimped pipe joints as such F16L13/14)} - B23P 11/005: {by expanding or crimping} - B23P 17/00: Metal-working operations, not covered by a single other subclass or another group in this subclass - F01N 3/2853: {using mats or gaskets between catalyst body and housing} - F01N 13/141: {Double-walled exhaust pipes or housings} - F01N 13/18: Construction facilitating manufacture, assembly, or disassembly - F01N 13/1838: {characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles} - F01N 13/185: {the connection being realised by deforming housing, tube, baffle, plate, or parts thereof} - B23P 2700/03: Catalysts or parts thereof - F01N 2260/10: for avoiding stress caused by expansions or contractions due to temperature variations - F01N 2260/18: for improving rigidity, e.g. by wings, ribs - F01N 2350/00: Arrangements for fitting catalyst support or particle filter element in the housing - F01N 2450/02: Fitting monolithic blocks into the housing - F01N 2450/20: by mechanical joints, e.g. by deforming housing, tube, baffle plate or parts thereof - Y10T 29/49345: Catalytic device making - Y10T 29/49398: Muffler, manifold or exhaust pipe making - Y10T 29/49861: Sizing mating parts during final positional association - Y10T 29/49897: Registering mating opposed tool parts [e.g., registering a punch and a cooperating die] - Y10T 29/49913: by constricting outer annulus - Y10T 29/49927: Hollow body is axially joined cup or tube - Y10T 29/53: Means to assemble or disassemble - Y10T 29/53726: with second workpiece inside annular work one workpiece moved to shape the other - Y10T 29/53996: by deforming - 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) - B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F) - B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A method of manufacturing an exhaust gas carrying device, in particular an exhaust gas purification device, and a tool provided therefor include segment-like jaws that are used to deforma an outer housing. The jaws have indentations or projections adjacent to each other, and which are complementary to form a continuously surrounding indentation/projection. The reshaped outer housing is provided with one or more surrounding projections or indentations by the deformation. ## Claims ### Claim 1 A method of manufacturing an exhaust gas carrying device, in particular an exhaust gas purification device, which has an outer housing with an insert clamped therein, comprising the following steps: (a) providing a tool having a plurality of jaws which are adapted to be moved inwards against the outer housing, and wherein the jaws extend axially beyond a length of the outer housing; (b) providing an indentation or a projection on an inside of each jaw, with indentations or projections of all jaws being oriented in relation to each other such that a continuously surrounding indentation or a continuously surrounding projection is obtained; (c) placing the outer housing and the insert positioned therein into the tool; (d) deforming the outer housing by closing the jaws to clamp the insert in the outer housing; and (e) producing a surrounding projection or a surrounding indentation on the outer housing remote from ends of the outer housing when closing the jaws. ### Claim 2 (depends on 1) The method according to claim 1, wherein step (e) includes producing a plurality of projections or indentations that are axially spaced from each other on the outer housing. ### Claim 3 (depends on 1) The method according to claim 1, including forming the projection or the indentation to have an arcuate radial end in cross-section. ### Claim 4 (depends on 1) The method according to claim 1, including configuring the outer housing as a circumferentially closed tube into which the insert is inserted. ### Claim 5 (depends on 1) The method according to claim 1, wherein the insert comprises a substrate and a flexible bearing mat surrounding the substrate. ### Claim 6 (depends on 1) The method according to claim 1, wherein step (e) includes producing a plurality of projections or indentations that are axially spaced from each other along a length of the outer housing such that opposing axial ends of the insert extend axially beyond the projections or indentations. ### Claim 7 (depends on 6) The method according to claim 6, wherein the insert comprises a substrate and a flexible bearing mat surrounding the substrate, and wherein all projections and indentations are formed in the outer housing between opposing axial ends of the substrate and the flexible bearing mat. ### Claim 8 (depends on 7) The method according to claim 7, including deforming the outer housing and the flexible bearing mat such that the mat extends into the projections or indentations. ### Claim 9 (depends on 1) The method according to claim 1, including forming the projections or indentations on the jaws such that each jaw includes more than one projection or indentation. ### Claim 10 A tool for manufacturing an exhaust gas carrying device comprising: a plurality of movable jaws having inner faces of which, in a closed condition, have an inner contour corresponding to an outer contour to be attained of an outer housing, the jaws having on the inner faces thereof a plurality of indentations or projections, the indentations or projections circumferentially adjoining the indentations/projections of adjacent jaws to produce a plurality of continuously surrounding indentations or projections that are axially spaced apart from each other along a length of the outer housing. ### Claim 11 (depends on 10) The tool according to claim 10, wherein the jaws have a greater length than a length of the outer housing. ### Claim 12 (depends on 10) The tool according to claim 10, wherein each jaw is defined by a jaw length extending axially from a first jaw end to a second jaw end, and wherein each jaw length is greater than the length of the outer housing. ### Claim 13 (depends on 12) The tool according to claim 12, wherein each jaw includes a plurality of indentations with each indentation forming a circumferential portion of the continuously surrounding indentations, and with the circumferential portions being axially spaced apart from each other along the jaw length. ### Claim 14 (depends on 13) The tool according to claim 13, wherein the indentation has an arcuate radial end in cross-section. ### Claim 15 A method of manufacturing an exhaust gas carrying device, in particular an exhaust gas purification device, which has an outer housing with an insert clamped therein, comprising the following steps: (a) providing a tool having a plurality of jaws that are circumferentially spaced apart from each other and which are adapted to be moved radially inwards against the outer housing; (b) providing a plurality of indentations on an inside of each jaw, with indentations of circumferentially adjacent jaws being oriented in relation to each other such that a continuously surrounding indentation is obtained, and with the indentations of each jaw being axially spaced apart from each other; (c) placing the outer housing and the insert positioned therein into the tool; (d) deforming the outer housing by closing the jaws to clamp the insert in the outer housing; and (e) producing a plurality of continuously surrounding projections on the outer housing remote from ends of the outer housing when closing the jaws, the continuously surrounding projections being axially spaced apart from each other along a length of the outer housing. ### Claim 16 (depends on 15) The method according to claim 15, wherein the jaws have a greater length than a length of the outer housing. ### Claim 17 (depends on 15) The method according to claim 15, including configuring the outer housing as a circumferentially closed tubular housing into which the insert is inserted. ### Claim 18 (depends on 15) The method according to claim 15, wherein opposing axial ends of the insert extend axially beyond the continuously surrounding projections. ### Claim 19 (depends on 18) The method according to claim 18, wherein the insert comprises a substrate and a flexible bearing mat surrounding the substrate, and wherein all projections are formed in the outer housing between opposing axial ends of the substrate and the flexible bearing mat.