Caoutchouc Manufacture Et Plastiques

Christian Ledevehat

Robert Colley

Fabrice Lecouturier

Olivier Parguez

A composite material includes an elastomer matrix forming a basic component of the material. There is included a cross-linking system of the elastomer matrix and at least one fiber reinforcement including fibers with a maximum length of about 30 mm. The fibers are disposed throughout the elastomer matrix and are generally oriented to extend in a first direction of reinforcement. There is at least one thermosetting resin in the elastomer matrix. The elastomer matrix which includes the cross-linking system, the fiber reinforcement and the thermosetting resin has a first equivalent tensile modulus which is calculated for a hypothetical elongation of 100% in the first direction and a second equivalent tensile modulus which is calculated for an actual or hypothetical elongation of 100% in a second direction which is perpendicular to the first direction. A second equivalent tensile modulus is at least 6 MPa. Anisotropy ratio of the first equivalent tensile modulus and the second equivalent tensile modulus is at least 6.

Flexible expansion compensation sleeve for connecting sections of pipe

Anisotropic composite material having an elastomer matrix

A transmission mechanism for continuously variable transmissions comprises at least one endless flexible connecting element which is non-metallic, flexible, quasi-inextensible longitudinally, and a plurality of transverse links, also non-metallic. Each link includes at least one groove in which is engaged the endless flexible connecting element. The transmission mechanism is further characterized by the fact that the coefficient of friction between the endless flexible connecting element and the transverse links is a maximum of 0.4. The transverse links, which are axially perfectly symmetrical, have on each of their faces, a device for guidance of the transverse links relative to one another.

Variable speed transmission device

A composite material for a transmission belt includes an elastomer matrix forming a basic component of the material. There is included a cross-linking system of the elastomer matrix and at least one fiber reinforcement including fibers with a maximum length of about 30 mm. The fibers are disposed throughout the elastomer matrix and are generally oriented to extend in a first direction of reinforcement. There is at least one thermosetting resin in the elastomer matrix. The elastomer matrix which includes the cross-linking system, the fiber reinforcement and the thermosetting resin has a first equivalent tensile modulus which is calculated for a hypothetical elongation of 100% in the first direction and a second equivalent tensile modulus which is calculated for an actual or hypothetical elongation of 100% in a second direction which is perpendicular to the first direction. A second equivalent tensile modulus is at least 6 MPa. Anisotropy ratio of the first equivalent tensile modulus and the second equivalent tensile modulus is at least 6. The elastomer matrix forming the basic component is in at least one layer within the transmission belt which includes a longitudinal axis. The first direction of reinforcement of the at least one layer is perpendicular to the longitudinal axis.

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Clermont-Ferrand, France

Christian Ledevehat