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Oscar D'Almeida

Mathias Woydt

Jean-Thierry Audren

The invention concerns a system, in particular suitable for high power engines, comprising at least a rotor and means comprising active sections fit for making the rotor(s) rotate by their synchronized deformation, characterized in that the rotor material comprises an Al, Fe alloy with at least one other element, the alloy comprising at least more or less 80% in weight of Al and at least between 0.1 and 15.0% in weight in Fe.

Rotors of high power engines

The invention concerns an actuator which includes a linear piston () in an active material, and an inner sliding cylinder (') which includes an outer cylinder (&#x2032;) in which the said sliding cylinder ((&#x2032;) is pre-stressed, with one cylinder being in an anisotropic material with a negative or approximately zero expansion coefficient along at least one axis and a positive or approximately zero expansion coefficient on at least one other axis, and the other cylinder having a positive thermal or approximately zero expansion coefficient.

Materials of the cylinders of active-piston actuators

The invention relates to an actuator comprising a sliding sleeve and an active piston, control means, wherein the sliding sleeve and the piston have at their interface at least one pair of friction layers,

Mechanical actuator comprising an active linear piston

The invention concerns an actuator that includes an active piston, an inner sliding cylinder and an outer cylinder in which the said sliding cylinder is pre-stressed, where one of the cylinders is in a material with a negative thermal expansion coefficient or one that is close to zero, with the other cylinder having a positive thermal expansion coefficient, in which the material of the cylinder with negative expansion coefficient or one close to zero is one of the following materials:

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Boulogne Billancourt, France

Oscar D'Almeida