A self-retracting flexible composite hose of helical configuration has a core tube and sheath of crystalline-like polymer which has an elastic memory, a layer of helically wound spaced strands of fibrous reinforcing material which only partially covers the core tube and polymeric protuberances integral with the sheath extending between the strands and fusion welded to the core tube.
A housing secured to a truck tractor body contains pneumatic and electrical outlets for supplying air pressure and electricity to a trailer for powering brakes and lights. The housing contains an inlet for receiving a pair of air hoses and an electrical cable connected respectively to electrical and pneumatic systems inside the tractor. Inside the housing, the hoses and cables are connected to outlets mounted on the housing shell. Helically coiled hose extensions and jumper cable are connected respectively from the pneumatic and electrical outlets on the housing to suitable inlet connectors on the trailer. When the extensions and jumper are not connected to the trailer, they are attached to retainer brackets on the housing for storage. A lamp is mounted to the housing for illuminating a working area between the tractor body and trailer during hookup of the hoses and cable. The lamp is controlled by a switch mounted on the housing. Other service valves and switches may be mounted in the housing. The sidewalls of the housing are inclined to reduce wind resistance and to avoid interference with the trailer during a hard turn and snagging with external objects.
Brakes mounted on the wheels of slidably adjustable axles used with truck trailers are connected by a pair of flexible coiled tubes to service and emergency air lines. The flexible coiled tubes are mounted one within the other and have identical end fittings which connect directly to service and emergency air lines and directly to airbrake lines. No intermediate fittings are utilized. The end fittings of each coiled tube are also mounted in fixed relation to a transverse support bracket mounted on the trailer body and to a bracket mounted on a rear axle support. Each end fitting has first, second, and third threaded portions, with the first threaded portion coupled to the end of one of the coiled tubes, the second threaded portion being received through a hole in a bracket, and the third threaded portion being coupled with either an air pressure supply line or an airbrake line.
A hose for transport of fluid such as oil for a cooling system of an engine oil cooler, a torque converter oil cooler, etc. and oil for an oil lubrication system of a vacuum pump that are used in automobiles, aircraft, etc., and the hose comprises an inner tube of acrylic rubber; a reinforcement ply including lower yarns spirally wound on the outside surface of aforesaid inner tube such that the size of mesh will be 0.5 mm or more, and upper yarns spirally wound on said lower yarns and an outer tube of acrylic rubber laminated over the outside surface of aforesaid inner tube through said reinforcement ply, aforesaid inner tube and aforesaid outer tube being directly bonded by vulcanization through the meshes of said reinforcement ply.
A multilayer pipe is comprised of an internal tubular ply made from a synthetic material, a strengthening reinforcement member also made from a synthetic material and an external ply made from a synthetic material. At least one of the plies is bonded, by melting, to the reinforcement member. The strengthening reinforcement member has, over the whole or part of its length, a reticulate lacunary structure, of which only internal and external faces thereof are bonded to corresponding adjacent plies. Spaces of the lacunary structure are blocked off by, but not filled by, these plies.
