Abstract: A coupling device is provided having a female coupling engageable with a male coupling and a ring interposable between the couplings and provided with retaining means. A gasket is housed in the female coupling and held in position by the ring. The retaining means axially holds the ring to the female coupling and has two windows spaced apart in the circumferential direction over the body of the ring. The complementary retaining means of the female coupling has two lugs projecting from the tubular body constituting the female coupling. Each window houses an elastically deformable tongue having its free end co-operating with a longitudinal edge of the window to provide a housing within which one of the lugs becomes inserted in the engaged state of the female coupling and of the ring, and the retaining means holds the ring to the male coupling having two through openings arranged in the body of the ring and a locking member.

Abstract: A motor vehicle cooling fluid flow pipe, such as an engine cooling fluid pipe, characterized in that the wall of the pipe is constituted by a single layer made of a polymer material comprising a mixture of at least two polymer materials of different natures, one of which, referred to as a first material, being a polyolefin, and the other of which, referred to as a second material, being a thermoplastic polymer elastomer (TPE). The method of manufacturing this pipe comprises an operation of mixing at least the polyolefin and the thermoplastic polymer elastomer (TPE), a step of extruding said mixture in a screw extruder followed by a step of forming the pipe, the operation of mixing the polyolefin and the thermoplastic polymer elastomer (TPE) being performed upstream from the extruder or at its inlet.

Abstract: A coupling device (1) comprising: a female coupling (2) engageable with a male coupling; a ring (3) interposable between said couplings and provided with retaining means; and a gasket (7) housed in the female coupling (2) and held in position by the ring (3).

Abstract: A motor vehicle cooling fluid flow pipe, such as an engine cooling fluid pipe, characterized in that the wall of the pipe is constituted by a single layer made of a polymer material comprising a mixture of at least two polymer materials of different natures, one of which, referred to as a first material, being a polyolefin, and the other of which, referred to as a second material, being a thermoplastic polymer elastomer (TPE). The method of manufacturing this pipe comprises an operation of mixing at least the polyolefin and the thermoplastic polymer elastomer (TPE), a step of extruding said mixture in a screw extruder followed by a step of forming the pipe, the operation of mixing the polyolefin and the thermoplastic polymer elastomer (TPE) being performed upstream from the extruder or at its inlet.