# US 2004/0113422 A1 · Exhaust vibration decoupling connector with locked liner tubes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2004/0113422 A1 - Document ID: US20040113422A1 - Status: Published application - Kind: A1 - Application number: 10/718,444 - Filed: 2003-11-19 - Published: 2004-06-17 - Earliest claimed: 2002-11-26 - Assignees: Microflex Corporation - Inventors: Josif Atanasoski; Italo DeBlasi - Web page: https://patentgrep.com/patent/US20040113422A1 ## CPC - F01N 13/1816: {the pipe sections being joined together by flexible tubular elements only, e.g. using bellows or strip-wound pipes} - F01N 13/1811: {with means permitting relative movement, e.g. compensation of thermal expansion or vibration} - 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) ## Abstract An exhaust-vibration decoupling connector has an inlet tube (1) extended downstream from a decoupler inlet (2) to an inlet-tube step (22). The inlet-tube step includes a radially inward extension of the inlet tube to a damper seat (23) that includes further downstream extension of the inlet tube having a bend (36,37) which interlocks with a radially inward extension (24) of an outlet tube to prevent the connector from extension movement. An outlet tube (4) is extended upstream from a decoupler outlet (5) to an outlet-tube step (24) that includes a radially inward extension of the outlet tube to proximate an outside surface of the damper seat. A vibration damper is positioned removably in a damper fixture (3) that includes the damper seat intermediate the inlet-tube step and the outlet-tube step proximate midway between the decoupler inlet and the decoupler outlet. Surrounding the vibration damper, a decoupler bellows (7) has an upstream bellows attachment (9) proximate an outside periphery of the inlet tube and a downstream bellows attachment (10) proximate an outside periphery of the outlet tube. Enclosing an outside periphery of the decoupler bellows is a flex cover (13) that is extended from proximate the decoupler inlet to the decoupler outlet. External to the flex cover and external to the decoupler bellows can be a shield sleeve (16) that is extended from proximate the decoupler outlet to predeterminedly proximate the decoupler inlet for rigid protection of the decoupler bellows, and the flex cover. The decoupler inlet is articulated for attachment to an exhaust-outlet structure (33) on an engine. The decoupler outlet is articulated for attachment to an exhaust-treatment structure (34). ## Claims ### Claim 1 An exhaust-vibration decoupling connector comprising: an inlet tube extended downstream from a decoupler inlet to proximate an upstream portion of a damper fixture, said inlet tube having outlet radial bend around a circumference on an upstream end to interlock with an outlet tube; an outlet tube extended upstream from a decoupler outlet to proximate a downstream portion of the damper fixture, said outlet tube having an inward radial bend on a downstream end which interlocks with the bend on the inlet tube; the damper fixture being proximate midway between the decoupler inlet and the decoupler outlet; a vibration damper positioned removably in the damper fixture; a bellows having an upstream bellows attachment proximate the decoupler inlet; the bellows having a downstream bellows attachment proximate the decoupler outlet; the bellows having a bellows inside perimeter that is positioned radially outward predeterminedly from a radially outside perimeter of the vibration damper; the bellows inside perimeter including inside peripheries of undulations of the bellows; a flex cover having an upstream flex attachment proximate the decoupler inlet; the flex cover having a downstream flex attachment proximate the decoupler outlet; the flex cover having a cover inside perimeter that is positioned proximate a bellows outside perimeter; a shield sleeve having a shield attachment proximate the decoupler outlet; and the shield sleeve having a shield inside perimeter that is positioned radially outward predeterminedly from a radially outside perimeter of the flex cover. ### Claim 2 (depends on 1) The exhaust-vibration decoupling connector of claim 1 wherein: the upstream bellows attachment includes an upstream bellows sleeve extending downstream axially a predetermined attachment distance from proximate the decoupler inlet to a first undulation wall that is extended radially intermediate the upstream bellows sleeve and a first side of a first undulation of the bellows; the downstream bellows attachment includes a downstream bellows sleeve extending upstream axially a predetermined attachment distance from proximate the decoupler outlet to a second undulation wall that is extended radially intermediate the downstream bellows sleeve and a second side of a last undulation of the bellows; the upstream bellows sleeve includes an inside periphery that is positioned removably on an outside periphery of a fastener portion of the inlet tube; and the downstream bellows sleeve includes an inside periphery that is positioned removably on an outside periphery of a fastener portion of the outlet tube. ### Claim 3 (depends on 2) The exhaust-vibration decoupling connector of claim 2 wherein: the upstream flex attachment includes an upstream flex-cover sleeve extending downstream axially a predetermined attachment distance from proximate the decoupler inlet to a first flex-cover wall that is extended radially intermediate the upstream flex-cover sleeve and a first attachment side of the flex cover; and the downstream flex attachment includes a downstream flex-cover sleeve extending upstream axially a predetermined attachment distance from proximate the decoupler outlet to a second flex-cover wall that is extended radially intermediate the downstream flex-cover sleeve and a second attachment side of the flex cover. ### Claim 4 (depends on 3) The exhaust-vibration decoupling connector of claim 3 wherein: the upstream flex-cover sleeve includes an inside periphery that is positioned removably on an outside periphery of the upstream bellows sleeve; and the downstream flex-cover sleeve includes an inside periphery that is positioned removably on an outside periphery of the downstream bellows sleeve. ### Claim 5 (depends on 1) The exhaust-vibration decoupling connector of claim 1 wherein: the inlet tube is circumferential with an inside periphery and an outside periphery; the outlet tube is circumferential with an inside periphery and an outside periphery; the inside periphery and the outside periphery of the inlet tube are predeterminedly smaller than the inside periphery and the outside periphery of the outlet tube; the damper fixture includes an inlet-tube step extended radially inward to a damper seat having an axial downstream extension of the inlet tube; the damper fixture includes an outlet-tube step extended radially inward to predeterminedly proximate an outside periphery of the damper seat; the inlet-tube step includes a first side of the damper fixture; and the outlet-tube step includes a second side of the damper fixture. ### Claim 6 (depends on 5) The exhaust-vibration decoupling connector of claim 5 wherein: the outlet-tube step is articulated to allow axial and pivotal travel of the outlet tube in relation to the inlet tube predeterminedly. ### Claim 7 (depends on 5) The exhaust-vibration decoupling connector of claim 5 wherein: the vibration damper includes a mesh-wire washer having an inside periphery that is positioned removably on the damper seat, an outside periphery that is predeterminedly smaller than the bellows inside periphery, a first side proximate the inlet-tube step and a second side proximate the outlet-tube step. ### Claim 8 (depends on 5) The exhaust-vibration decoupling connector of claim 5 wherein: the vibration damper includes a wave-spring damper having one or more wave springs intermediate wave-spring washers in detachably sealed contact with the inlet-tube step and the outlet-tube step. ### Claim 9 (depends on 5) The exhaust-vibration decoupling connector of claim 5 wherein: the vibration damper includes a helical-spring damper; the helical-spring damper has a first side in detachable contact with the inlet-tube step and a second side in detachably contact with the outlet-tube step. ### Claim 10 (depends on 5) The exhaust-vibration decoupling connector of claim 5 wherein: the vibration damper includes a spring-side damper having a helical spring in a circumferential channel with a first wall adjacent to the inlet-tube step and a second wall adjacent to the outlet-tube step; the circumferential channel is arcuate intermediate the first wall and the second wall; and the first wall and the second wall have inside peripheries proximate the outside periphery of the damper seat. ### Claim 11 (depends on 1) The exhaust-vibration decoupling connector of claim 1 and further comprising: the flex cover includes a heat-resistant and flexible material that is reinforced with wire network predeterminedly. ### Claim 12 (depends on 1) The exhaust-vibration decoupling connector of claim 1 wherein: the flex cover includes braided-wire material. ### Claim 13 (depends on 12) The exhaust-vibration decoupling connector of claim 12 wherein: the flex cover includes a braid cap that is positioned intermediate the upstream flex attachment and exhaust-outlet structure to which the exhaust-vibration decoupling connector is attachable. ### Claim 14 (depends on 1) The exhaust-vibration decoupling connector of claim 1 wherein: the upstream bellows attachment is articulated for sealed attachment to a predetermined exhaust-outlet structure; and the downstream bellows attachment is articulated for sealed attachment to a predetermined exhaust-treatment structure that is fluidly downstream from the exhaust-outlet structure. ### Claim 15 (depends on 13) The exhaust-vibration decoupling connector of claim 13 wherein: the upstream bellows attachment is disposed a snug-fit distance from the downstream bellows attachment for fitting snugly intermediate the exhaust-outlet structure and the exhaust-treatment structure predeterminedly. ### Claim 16 (depends on 15) The exhaust-vibration decoupling connector of claim 15 wherein: the shield sleeve has a shield length that is less than the snug-fit distance for allowing axial distance change between the decoupler inlet and the decoupler outlet and for allowing pivotal movement of the decoupler outlet predeterminedly. ### Claim 17 (depends on 1) The exhaust-vibration decoupling connector of claim 1 wherein: the bellows includes flexibly parallel walls intermediate arcuately flexible floors and roofs. ### Claim 18 (depends on 17) The exhaust-vibration decoupling connector of claim 17 wherein: the bellows includes oppositely disposed ends that are buttressed against oppositely disposed end walls of the flex cover. ### Claim 19 (depends on 1) The exhaust-vibration decoupling connector of claim 1 wherein: the bellows includes damping filler intermediate internal walls of undulations of the bellows. ### Claim 20 (depends on 19) The exhaust-vibration decoupling connector of claim 19 wherein: the damping filler includes mesh wire. ### Claim 21 An exhaust-vibration decoupling connector comprising: an inlet tube extended downstream from an upstream portion of the inlet tube proximate a decoupler inlet to proximate an upstream portion of a damper fixture, said inlet tube having outward radial bend around a circumference on an upstream end to interlock with an outer tube; an outlet tube extended upstream from a downstream portion of the outlet tube proximate a decoupler outlet to proximate a downstream portion of the damper fixture, said outlet tube having an inward radial bend on a downstream end which interlocks with the bend on the inlet tube; the damper fixture being proximate midway between the decoupler inlet and the decoupler outlet; a vibration damper positioned removably in the damper fixture; a bellows having an upstream bellows attachment proximate the decoupler inlet; the bellows having a downstream bellows attachment proximate the decoupler outlet; the bellows having a bellows inside perimeter that is positioned radially outward predeterminedly from a radially outside perimeter of the vibration damper; the bellows inside perimeter including inside peripheries of the bellows; a flex cover having an upstream flex attachment proximate the decoupler inlet; the flex cover having a downstream flex attachment proximate the decoupler outlet; and the flex cover having a cover inside perimeter that is positioned proximate a bellows outside perimeter. ### Claim 22 (depends on 21) The exhaust-vibration decoupling connector of claim 21 wherein: the upstream bellows attachment includes an upstream bellows sleeve extending downstream axially a predetermined attachment distance from proximate the decoupler inlet to a first undulation wall that is extended radially intermediate the upstream bellows sleeve and a first side of a first undulation of the bellows; the downstream bellows attachment includes an downstream bellows sleeve extending upstream axially a predetermined attachment distance from proximate the decoupler outlet to a second undulation wall that is extended radially intermediate the downstream bellows sleeve and a second side of a last undulation of the bellows; the upstream bellows sleeve includes an inside periphery that is positioned removably on an outside periphery of a fastener portion of the inlet tube; the downstream bellows sleeve includes an inside periphery that is positioned removably on an outside periphery of a fastener portion of the outlet tube; the inlet tube is circumferential with an inside periphery and an outside periphery; the outlet tube is circumferential with an inside periphery and an outside periphery; the inside periphery and the outside periphery of the inlet tube are predeterminedly smaller than the inside periphery and the outside periphery of the outlet tube; the damper fixture includes an inlet-tube step extended radially inward to a damper seat having an axial downstream extension of the inlet tube; the damper fixture includes an outlet-tube step extended radially inward to predeterminedly proximate an outside periphery of the damper seat; the inlet-tube step includes a first side of the damper fixture; and the outlet-tube step includes a second side of the damper fixture. ### Claim 23 (depends on 22) The exhaust-vibration decoupling connector of claim 22 wherein: the outlet-tube step is articulated to allow axial and pivotal travel of the outlet tube in relation to the inlet tube predeterminedly. ### Claim 24 (depends on 22) The exhaust-vibration decoupling connector of claim 22 wherein: the vibration damper includes a mesh-wire washer having an inside periphery that is positioned removably on the damper seat, an outside periphery that is predeterminedly smaller than the bellows inside periphery, a first side proximate the inlet-tube step, and a second side proximate the outlet-tube step. ### Claim 25 (depends on 22) The exhaust-vibration decoupling connector of claim 22 wherein: the vibration damper includes a helical-spring damper; ### Claim 26 (depends on 22) The exhaust-vibration decoupling connector of claim 22 wherein: the vibration damper includes a wave-spring damper. ### Claim 27 (depends on 22) The exhaust-vibration decoupling connector of claim 22 wherein: the vibration damper includes a spring-side damper having a helical spring in a circumferential channel with a first wall adjacent to the inlet-tube step and a second wall adjacent to the outlet-tube step; the circumferential channel is arcuate intermediate the first wall and the second wall; and the first wall and the second wall have inside peripheries proximate the outside periphery of the damper seat. ### Claim 28 (depends on 21) The exhaust-vibration decoupling connector of claim 21 wherein: the upstream bellows attachment is articulated for sealed attachment to a predetermined exhaust-outlet structure; and the downstream bellows attachment is articulated for sealed attachment to a predetermined exhaust-treatment structure that is fluidly downstream from the exhaust-outlet structure. ### Claim 29 (depends on 21) The exhaust-vibration decoupling connector of claim 21 wherein: the upstream bellows attachment is disposed a snug-fit distance from the downstream bellows attachment for fitting snugly intermediate the exhaust-outlet structure and the exhaust-treatment structure predeterminedly. ### Claim 30 (depends on 21) The exhaust-vibration decoupling connector of claim 21 wherein: the bellows includes flexibly parallel walls intermediate arcuately flexible floors and roofs. ### Claim 31 (depends on 21) The exhaust-vibration decoupling connector of claim 21 wherein: the bellows includes damping filler intermediate internal walls of undulations of the bellows. ### Claim 32 (depends on 21) The exhaust-vibration decoupling connector of claim 21 wherein: the damping filler includes mesh-wire rings.