Decoupling sleeve for mounting in a motor vehicle exaust pipe

A decoupling sleeve for mounting in a motor vehicle exhaust pipe, the sleeve comprising a mechanical portion having two rigid end zones for connection to the exhaust pipe and a flexible mechanical link extending between and interconnecting said rigid end zones, and a sealing portion that is thermally insulated from the inside by an insulation portion and that extends over substantially the entire length of the mechanical portion of the sleeve, wherein the sealing portion comprises a central zone formed by a layer or wall made of a material that is flexible and that withstands temperature, and two rigid end zones respectively connected to said two end zones of the mechanical portion, the sealing portion forming a covering that is continuous, closed, and leakproof, further including a deformable and thermally conductive element which surrounds the flexible layer internally or externally.

A decoupling sleeve for mounting in a motor vehicle exhaust pipe, the sleeve comprising a mechanical portion having two rigid end zones for connection to the exhaust pipe and a flexible mechanical link extending between and interconnecting said rigid end zones, and a sealing portion that is thermally insulated from the inside by an insulation portion and that extends over substantially the entire length of the mechanical portion of the sleeve, wherein the sealing portion comprises a central zone formed by a layer or wall made of a material that is flexible and that withstands temperature, and two rigid end zones respectively connected to said two end zones of the mechanical portion, the sealing portion forming a covering that is continuous, closed, and leakproof, wherein each end zone of the sealing portion is made in the form of a long and thin cover, and wherein each cover supports cooling fins.

A decoupling sleeve for mounting in a motor vehicle exhaust pipe, the sleeve comprising a mechanical portion having two rigid end zones for connection to the exhaust pipe and a flexible mechanical link extending between and interconnecting said rigid end zones, and a sealing portion that is thermally insulated from the inside by an insulation portion and that extends over substantially the entire length of the mechanical portion of the sleeve, wherein the sealing portion comprises a central zone formed by a layer or wall made of a material that is flexible and that withstands temperature, and two rigid end zones respectively connected to said two end zones of the mechanical portion, the sealing portion forming a covering that is continuous, closed, and leakproof, wherein each end zone of the sealing portion is made in the form of a long and thin cover, and wherein each cover is made of a material that is a poor conductor of heat.

A decoupling sleeve for mounting in a motor vehicle exhaust pipe, the sleeve comprising a mechanical portion having two rigid end zones for connection to the exhaust pipe and a flexible mechanical link extending between and interconnecting said rigid end zones;

• a sealing portion comprising a central zone made of a material that is flexible and that withstands temperature and two rigid end zones or covers respectively connected to said two end zones of the mechanical portion;
• wherein the mechanical and sealing portions are dissociated from each other so as to perform their respective functions independently of each other, the central zone is constituted by at least a thin layer of an elastomer material which is thermally protected radially by an insulation portion that extends over substantially the entire length of the mechanical portion of the sleeve, and which is also thermally protected axially by the covers which are relatively long and thin.

A decoupling sleeve for mounting in a motor vehicle exhaust pipe, the sleeve comprising a mechanical portion having two rigid end zones for connection to the exhaust pipe and a flexible mechanical link extending between and interconnecting said rigid end zones;

• a sealing portion comprising a central zone made of a material that is flexible and that withstands temperature and two rigid end zones or covers respectively connected to said two end zones of the mechanical portion;
• wherein the mechanical and sealing portions are dissociated from each other so as to perform their respective functions independently of each other, the central zone is constituted by at least a thin layer of an elastomer material having a thickness of about 0.5 mm to 2 mm and which is thermally protected radially by an insulation portion that extends over substantially the entire length of the mechanical portion of the sleeve;
• and which is also thermally protected axially by the covers which are relatively long and thin with a thickness of about 0.2 mm to 1 mm.

A decoupling sleeve for mounting in a motor vehicle exhaust pipe, the sleeve comprising a mechanical portion having two rigid end zones for connection to the exhaust pipe and a flexible mechanical link extending between and interconnecting said rigid end zones;

• a sealing portion comprising a central zone made of a material that is flexible and that withstands temperature and two rigid end zones or covers respectively connected to said two end zones of the mechanical portion;
• wherein the mechanical and sealing portions are dissociated from each other so as to perform their respective functions independently of each other, the central zone is constituted by at least a thin layer of an elastomer material having a thickness of about 0.5 mm to 2 mm and which is thermally protected radially by an insulation portion that having a thickness of about 5 mm to 20 mm and extends over substantially the entire length of the mechanical portion of the sleeve, and which is also thermally protected axially by the covers which are relatively long and thin.

A decoupling sleeve for mounting in a motor vehicle exhaust pipe, the sleeve comprising a mechanical portion having two rigid end zones for connection to the exhaust pipe and a flexible mechanical link extending between and interconnecting said rigid end zones;

• a sealing portion comprising a central zone made of a material that is flexible and that withstands temperature and two rigid end zones or covers respectively connected to said two end zones of the mechanical portion;
• wherein the mechanical and sealing portions are dissociated from each other so as to perform their respective functions independently of each other, the central zone is constituted by at least a thin layer of an elastomer material having a thickness of about 0.5 mm to 2 mm and which is thermally protected radially by an insulation portion having a thickness of about 0.5 mm to 20 mm and that extends over substantially the entire length of the mechanical portion of the sleeve, and which is also thermally protected axially by the covers which are relatively long and thin.