Abstract: A heat-shrink tube for an electrical power cable comprises a sleeve having an insulating inner layer, a conductive outer layer and a thermoplastic mid-layer located between the inner and outer layers. The mid-layer is recovered by the application of heat thereto. The insulating inner layer is preferably comprised of an elastomeric material and the thermoplastic mid-layer is rigid and acts to retain the inner layer in a radially expanded state prior to its recovery.

Abstract: A heat-shrink tube for an electrical power cable comprises a sleeve having an insulating inner layer, a conductive outer layer and a thermoplastic mid-layer located between the inner and outer layers. The mid-layer is recovered by the application of heat thereto. The insulating inner layer is preferably comprised of an elastomeric material and the thermoplastic mid-layer is rigid and acts to retain the inner layer in a radially expanded state prior to its recovery.

Abstract: A carbon piston whose piston crown underside forms in the region between the increased-thickness boss portions independently of the surface configuration of the top side of the piston crown a curved surface, preferably an ellipsoidal surface, which adjoins the increased-thickness boss portions. The piston skirt has an axial profile in the form of a conical surface with rectilinear generatrices, which tapers upwardly to the connection to the ring portion.

Abstract: A gripping element for sports shoes comprising a gripping element body of plastic material and a ceramic insert (2) which forms the tread surface of the gripping element and which is embedded in the gripping element body and which is embraced within the gripping element body over a part of its length by a metal sleeve (3) which is also embedded in the gripping element body. In that arrangement a plastic material layer (14) is formed between the peripheral surface of the ceramic insert and the inside surface of the metal sleeve. In order to make the plastic material layer as uniform as possible in its wall thickness. at least the part of the peripheral surface of the ceramic insert (2), that is embraced by the metal sleeve, is smooth and narrows towards the tread surface (FIG. 1).

Abstract: The invention relates to the dry run-high pressure stage of a multistage piston compressor with a piston designed as a tappet (2) guided in the high pressure cylinder (1) and sealed against the compression space of the cylinder (1) by means of self-lubricating sealing elements (3) forming an annular gap together with the working surface, whereby the latter is formed by a material suitable for dry run. According to the invention, the sealing elements having a height conforming at least to their diameter are embodied in the form of at least two cylindrical sealing elements (3), which are loosely placed one on top of the other in the cylinder (1) on the free end of the tappet (2), provided with working surface guides at least in part areas, and have chamfers (6) on the face side.

Abstract: A gripping element for a sports shoe comprises a body portion of plastic material and a ceramic insert which is embedded into the body portion and which provides the ground-engaging surface of the element. The ceramic insert is surrounded over a part of its length by a metal sleeve which is also embedded into the body portion of the element. At least on its outside peripheral surface around which the metal sleeve extends, the ceramic insert has surface configurations such as annular ribs and/or grooves to provide a positive connection to the plastic material therearound, with a layer of plastic material between the ceramic insert and the metal sleeve.

Abstract: A gripping stud for sports shoes comprises a stud body and a ceramic insert connected to the stud body thereby to form the ground-engaging surface thereof. The stud body comprises a central metal portion and a base portion disposed therearound while the ceramic insert connected to the lower end of the metal portion is of a flat lens-like configuration, with curved top and bottom sides. Alternatively the ceramic insert comprises a plurality of juxtaposed balls embedded in a stud body at the ground-engaging surface of the stud.

Abstract: A safety device for motor vehicle seats, particularly for the protection of a child in the event of rapid deceleration, has a retaining belt, a deformable air bag, and belt loops arranged on the belt which hold and guide the air bag, so that at rapid deceleration the body of the child will exert forward pressure on the air cushion towards the front portion of the belt, and thereby the air bag will be deformed and will be raised in front of the body of the child to be protected.