Caoutchouc Manufacture Et Plastiques

Pneumatiques, Caoutchouc Manufacture Et Plastiques Kleber-colombes

Jacques J Champleboux

Jean-Pierre Bechu

Bernard Ragout

Franck Tailhardat

Maurice Rouby

Charles Moreau

Device with flexible hose, particularly for an expandable packer, wherein hose is reinforced by armature layers made of flexible cables disposed helically and is attached at least at one end by compression of said layers against rigid pieces, characterized by the supporting elements and gripping elements, which are coaxial, having nonadhesive conical compression surfaces which diverge toward the end and by at least one wedge provided with slits being driven between reinforcing layers to ensure compression.

Expandable hose device

An intercirculation tunnel between successive railroad cars or highway vehicles for ensuring protection against bad weather and atmospheric agents as well as noise and heat insulation as a unitized structure with oval constant cross section. The structure has a self-supporting wall that is elastically deformable throughout without mechanical devices, and that is composed of a multilayer composite of compact elastomers including an outer layer and an inner layer which can also contain reinforcements and an intermediate layer of a cellular polymer material.

Intercirculation tunnel between vehicles

A device for temporarily shutting off conduits comprises an elastic or resilient sleeve expansible under powerful internal pressure, and having a rubber wall comprising at least two superimposed plies defining an internal tube and an external sheath, the cords of all the plies being crossed from one ply to another while forming angles smaller than 30.degree. with respect to the generatrices. According to the invention, the pair of outer plies constitutes a resistant carcass of the sleeve while the pair of internal plies form protective plies constituted by adjacent cords having a diameter less than half that of the cords of the outer plies of the carcass and forming with the generatrices angles not greater than the angles of the cords of the carcass plies.

Shut-off devices

A self-floating flexible pipe for use with off-shore petroleum installations, which includes an inner reinforced pipe for conducting fluids which is surrounded by a layer of cellular material for assuring permanent floatation of the pipe. In order to protect the cellular layer, an outer reinforcing sheathing formed of helically wound metallic cables embedded in a rubber layer is provided. These helically wound metallic cables are wound at a setting angle with respect to the longitudinal axis of the pipe in the range of 56.degree. to 68.degree. so as to minimize the effect of these armoring cables on the flexibility of the overall pipe construction. These armoring cables are also preferably resilient in a longitudinal direction, with preferred embodiments including undulated cables so as to further lessen the impact of these cables on the flexibility of the pipe. An outer covering layer of polychloroprene is provided on the rubber layer within which the cables are embedded for protecting this rubber layer.

Growing community of inventors

Clermont-Ferrand, France

Jacques J Champleboux