Abstract: A cable drag chain including a series of hollow links for guiding and protecting cables, hoses or the like conduits, the conduits being connected between a stationary power supply and a movable machine member. Each link includes a pair of opposite link plates connected in parallel relation between upper and lower coupling bars made of a transparent synthetic resin to enable defects in the conduits to be seen from outside the cable.

Abstract: A method for manufacturing a resin impregnated cloth bearing surface wherein the resin impregnated cloth is deaerated to reduce air bubbles in the finished bearing.

Abstract: A chain includes a plurality of identical link elements each including a main body part with a cantilevered connecting part integrally formed at one end thereof. The connecting part includes an enlarged rounded head portion and a narrower neck portion extending between the head portion and the main body part. The main body part has a rounded recess and a narrow slot formed in a first surface thereof. The slot adjoins an end of the recess opposite the connecting element. The slot extends from the recess to adjoin a side surface of the main body. Confining sections extend from the surface of the main body adjacent the slot so as to overlie opposite sides of the recess. The recess, slot and confining sections together define an opening in the first surface which has substantially the same shape as the connecting element.

Abstract: A continuous push-drive chain formed by a plurality of blocks, each of the blocks having a letter V-shaped configuration in side elevation, defining large engagement surfaces relative to overall block size; and, structure for connecting adjacent blocks to one another disposed at one distal end of the V-shaped configuration, whereby large pushing forces between the blocks may be transmitted substantially unidirectionally and independently of the connecting structure, simultaneously increasing chain load capacity and reducing chain wear.

Abstract: A conveyor or chain having a tubular filament-wound cylindrical element used as the pins interconnecting the link plates and/or as rollers or bushings in the chain assembly. The element is formed from a length of tubular material which is wound on a mandrel having an outside diameter equal to the inside diameter of the tubular element. The filament of the winding is a long aramid fiber which is integrated in the tubular material by an adhesive agent.

Abstract: A link chain comprising a series of inner links, outer links and means connecting said inner and outer links for pivotal displacement about a series of transverse axes. The inner links are integral plastic structures of self-lubricating wear-resistant material, including a pair of side plates, a pair of bushing means extending between said plates and concentric with said transverse axes, and an outwardly projecting part at the side margin of each of the side plates extending along the central part of said side plates between the end edges of said adjacent outer links. The end edges of the metallic outer links and the projecting parts of the plastic structure are in the form of an arc of a circle concentric with the adjacent transverse axis. The thickness of the projecting part corresponds to the thickness of said outer links to form a substantially continuous sliding contact area along each side of the link chain.