Abstract: A tubular coupling comprising a female connector (2) into which a male connector (6) provided with an annular collar (7) is designed to be inserted axially, and a connection element (9) that extends in a transverse direction in the female connector. The connection element is designed to interfere mechanically with the collar while the male connector is being inserted into the female connector, and to move by itself in said transverse direction towards the inside of the female connector. In addition, the connection element and the female connector are also designed so that, after the reaction to the radial resilient deformation of the connection element on the collar of the male connector, they come to bear against each other in the manner of a projection (14) that, by resilient return, exerts pressure on a guide ramp (15), so as to generate a thrust force that extends the movement of the connection element towards the inside of the female connector.

Abstract: A tubular coupling comprising a female connector (2) into which a male connector (6) provided with an annular collar (7) is designed to be inserted axially, and a connection element (9) that extends in a transverse direction in the female connector. The connection element is designed to interfere mechanically with the collar while the male connector is being inserted into the female connector, and to move by itself in said transverse direction towards the inside of the female connector. In addition, the connection element and the female connector are also designed so that, after the reaction to the radial resilient deformation of the connection element on the collar of the male connector, they come to bear against each other in the manner of a projection (14) that, by resilient return, exerts pressure on a guide ramp (15), so as to generate a thrust force that extends the movement of the connection element towards the inside of the female connector.

Abstract: A preform intended for the manufacture of a metal foam having a porosity of between 62% and 85%, the preform including a set of precursors in the form of balls formed of a mixture of 12% to 25% of organic binder, 72% to 87% of sodium chloride and 1 to 3% of kalinite. The precursors have a diameter of around 1 mm to 10 mm, and preferably 4 mm, the precursors being obtained by granulating the mixture using a fluidized bed process.

Abstract: A manufacturing process for a metal foam provided with at least one channel and intended namely for the manufacture of heat exchangers using a preform of balls. A foundry core constituted by a central core and a coating of a material fusible at low temperature are arranged in a foundry mould, the preform is then tightly arranged around the core, the fusible material is then eliminated by heating at a low temperature, then the molten metal mass is cast in the mould in order to fill the free spaces between the balls and between the balls and the central core, and lastly the balls are eliminated.

Abstract: The invention relates to a preform intended for the manufacture of a metal foam having a porosity of between 62% and 85%, wherein it includes a set of precursors in the form of balls formed of a mixture of 12% to 25% of organic binder, 72% to 87% of sodium chloride and 1 to 3% of kalinite, the precursors have a diameter of around 1 to 10 mm and preferably of 4 mm and said precursors are obtained by granulating the mixture using the fluidized bed process.

Abstract: A tube coupling including a female connector a body into which a male connector having an annular collar is inserted axially, and a connection element is provided. The connection element extends in a transverse direction within the body of the female connector. The connection element is designed to interfere mechanically with the collar during insertion of the male connector and to move transversely of its own accord towards the inside of the female connector. The connection element includes a locking hook that cooperates with a locking catch provided in the female connector. The hook goes past the catch as a result of the mechanical interference of the collar that drives axial and radial elastic deformation of the connection element. The hook locks against the catch when the connection element is fully pushed into the female connector.