# US 10,371,038 B2 · Connection piece assembly unit, especially for an exhaust gas treatment device of an exhaust system of an internal combustion engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,371,038 B2 - Document ID: US10371038B2 - Status: Granted - Kind: B2 - Application number: 15/651,386 - Filed: 2017-07-17 - Published: 2018-01-25 - Granted: 2019-08-06 - Earliest claimed: 2016-07-19 - Assignees: Eberspächer Exhaust Technology GmbH & Co. KG - Applicants: Eberspächer Exhaust Technology GmbH & Co. KG - Inventors: Dan Liu; Peter Kast - Web page: https://patentgrep.com/patent/US10371038B2 ## CPC - F01N 13/1805: {Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body (pipe joints in general F16L; fixing auxiliaries in motor vehicles in general B60K)} - F01N 13/008: {Mounting or arrangement of exhaust sensors in or on exhaust apparatus (sensor arrangements for engine control F02D41/1439)} - F01N 13/08: Other arrangements or adaptations of exhaust conduits {(pipes, joints or supports therefor in general F16L; collecting or removing exhaust gases of vehicle engines in workshops B08B15/00, on highways E01C1/005)} - F01N 13/102: {having thermal insulation} - F01N 13/14: having thermal insulation {(exhaust manifolds F01N13/102)} - F01N 13/141: {Double-walled exhaust pipes or housings} - F01N 13/148: {Multiple layers of insulating material} - F16L 41/008: {for connecting a measuring instrument} - F01N 3/021: by means of filters - F01N 3/10: by thermal or catalytic conversion of noxious components of exhaust - F01N 2260/20: for heat or sound protection, e.g. using a shield or specially shaped outer surface of exhaust device - F01N 2310/00: Selection of sound absorbing or insulating material - F01N 2450/22: by welding or brazing - F01N 2450/24: by bolts, screws, rivets or the like - F01N 2510/02: for thermal insulation - F01N 2530/26: Multi-layered walls - F01N 2560/00: Exhaust systems with means for detecting or measuring exhaust gas components or characteristics - 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) - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL ## Abstract A connection piece assembly unit, especially for an exhaust gas treatment device of an exhaust system of an internal combustion engine, includes a connection piece (30) with a base area (32) for fixing the connection piece (30) to a carrier assembly unit. A covering element (40) projects over an outside (42) of the connection piece (30). ## Claims ### Claim 1 An exhaust gas treatment device for an exhaust system of an internal combustion engine, the exhaust gas treatment device comprising: a device housing; a covering device overlapping, in at least some areas, the device housing on an outside of the device housing; at least one connection piece assembly unit comprising: a connection piece with a base area for fixing the connection piece to a carrier assembly unit of the exhaust gas treatment device; and a covering element protruding over an outside of the connection piece, wherein the connection piece of at least one connection piece assembly unit is fixed to the device housing in a mounting area of the device housing, which mounting area is not overlapped by the covering device and the covering element of the connection piece assembly unit overlaps the covering device, in at least some areas of an edge area adjacent to the mounting area; the covering device comprising, at least one layer of covering material overlapping the device housing on an outside of the device housing in at least some areas, at least one layer of protective material overlapping the at least one layer of covering material in at least some areas on a side facing away from the outside of the device housing, the at least one layer of protective material, in the edge area of the covering device, which edge area is adjacent to the mounting area, extends with an edge section beyond at least one layer of covering material towards the connection piece and in a direction away from the outside of the device housing. ### Claim 2 (depends on 1) An exhaust gas treatment device in accordance with claim 1, wherein the covering element has a fastening area for fixing the covering element to the connection piece. ### Claim 3 (depends on 2) An exhaust gas treatment device in accordance with claim 2, wherein the covering element further comprises: an overlapping area extending, starting from the fastening area, in a direction away from the connection piece; or a shielding area extending in a direction towards the base area; or an overlapping area extending, starting from the fastening area, in a direction away from the connection piece and a shielding area extending in a direction towards the base area. ### Claim 4 (depends on 3) An exhaust gas treatment device in accordance with claim 3, wherein: wherein the covering element further comprises: an overlapping area extending, starting from the fastening area, in a direction away from the connection piece; and a shielding area extending in a direction towards the base area, wherein the shielding area extends, starting from the overlapping area, a distance from the fastening area. ### Claim 5 (depends on 2) An exhaust gas treatment device in accordance with claim 2, wherein the fastening area comprises a sleeve-shaped configuration and overlaps the connection piece on an outside of the connection piece. ### Claim 6 (depends on 5) An exhaust gas treatment device in accordance with claim 5, wherein: the fastening area is configured with an internal thread formation; the connection piece is configured with an external thread formation provided on an outside of the connection piece; and the internal thread formation of the fastening area fasteningly meshes with the external thread formation on the outside of the connection piece. ### Claim 7 (depends on 2) An exhaust gas treatment device in accordance with claim 2, wherein the fastening area has a ring washer-shaped configuration. ### Claim 8 (depends on 1) An exhaust gas treatment device in accordance with claim 1, wherein the covering element is fixed to the connection piece by a connection in substance comprising welding, soldering or bonding. ### Claim 9 (depends on 1) An exhaust gas treatment device in accordance with claim 1, wherein the connection piece has a connection piece opening configured with an internal thread formation for receiving an assembly unit to be carried at the connection piece, the assembly unit being at least one of a measuring probe and a tool meshing formation with an external polygon, provided at the covering element. ### Claim 10 (depends on 1) An exhaust gas treatment device in accordance with claim 1, wherein: in at least one connection piece assembly unit, the covering element overlaps the edge section in the direction away from the connection piece. ### Claim 11 (depends on 1) An exhaust gas treatment device in accordance with claim 1, wherein in the at least one connection piece assembly unit, the covering element is not in contact with the covering device. ### Claim 12 (depends on 1) An exhaust gas treatment device in accordance with claim 1, wherein the at least one connection piece assembly unit has the fastening area of the covering element held between the connection piece and an assembly unit carried on the connection piece. ### Claim 13 (depends on 1) An exhaust gas treatment device in accordance with claim 1, wherein: the at least one connection piece assembly unit has the connection piece fixed with a base area to the device housing by a connection in substance comprising welding or soldering. ### Claim 14 (depends on 1) An exhaust gas treatment device in accordance with claim 1, wherein the covering element has a fastening area for fixing the covering element to the connection piece. ### Claim 15 (depends on 14) An exhaust gas treatment device in accordance with claim 14, wherein the covering element further comprises: an overlapping area extending, starting from the fastening area, in a direction away from the connection piece; or a shielding area extending in a direction towards the base area; or an overlapping area extending, starting from the fastening area, in a direction away from the connection piece and a shielding area extending in a direction towards the base area. ### Claim 16 (depends on 15) An exhaust gas treatment device in accordance with claim 15, wherein: wherein the covering element further comprises: an overlapping area extending, starting from the fastening area, in a direction away from the connection piece; and a shielding area extending in a direction towards the base area, wherein the shielding area extends, starting from the overlapping area, a distance from the fastening area. ### Claim 17 (depends on 15) An exhaust gas treatment device in accordance with claim 15, wherein the fastening area comprises a sleeve-shaped configuration and overlaps the connection piece on an outside of the connection piece. ### Claim 18 (depends on 17) An exhaust gas treatment device in accordance with claim 17, wherein: the fastening area is configured with an internal thread formation; the connection piece is configured with an external thread formation provided on an outside of the connection piece; and the internal thread formation of the fastening area fasteningly meshes with the external thread formation on the outside of the connection piece. ### Claim 19 (depends on 1) An exhaust gas treatment device in accordance with claim 1, wherein: in at least one connection piece assembly unit, the covering element overlaps the edge section in the direction towards the outside of the device housing on a side facing away from the connection piece. ### Claim 20 (depends on 1) An exhaust gas treatment device in accordance with claim 1, wherein: in at least one connection piece assembly unit, the covering element overlaps the edge section in the direction away from the connection piece and overlaps the edge section in the direction towards the outside of the device housing on a side facing away from the connection piece. ### Claim 21 (depends on 1) An exhaust gas treatment device in accordance with claim 1, wherein: the at least one layer of covering material is composed of fiber material comprising ceramic fiber material. ### Claim 22 (depends on 1) An exhaust gas treatment device in accordance with claim 1, wherein: the at least one layer of protective material is composed of sheet metal material. ### Claim 23 (depends on 1) An exhaust gas treatment device in accordance with claim 1, wherein: the covering device has a hole-like opening in at least one mounting area, and the at least one connection piece assembly unit has the connection piece fixed with a base area to the device housing by a connection in substance comprising welding or soldering, and the at least one layer of covering material is composed of fiber material comprising ceramic fiber material, and the at least one layer of protective material is composed of sheet metal material.