Abstract: A steel flake product, suitable for being crushed or ground to form a steel powder for powder metallurgical purposes, consists of a plurality of relatively thin, brittle and easily crushed, substantially dendrite-free steel flakes of amorphous to compact-grained structure. Such steel flakes are produced by causing molten steel to form at least one discrete, relatively thin flake-shaped layer on a relatively cold metal surface of great cooling capacity, moving rapidly and substantially across the direction of delivery of the molten steel. Due to the great cooling capacity the layer is made to solidify extremely rapidly.

Abstract: A ball bushing comprising a sleeve, a cage, inside the sleeve adapted to be mounted on a shaft member or the like. The ball bushing has formed therein a number of closed ball paths, the balls being loaded between the sleeve and the shaft in a section or zone of each ball path. The sleeve has a number of longitudinal profiles countersunk in relation to a circle circumscribing the sleeve. The profiles define internal raceways for the loaded balls. The sleeve is also characterized by a generally uniform or constant cross sectional shape along its entire length.

Abstract: An improved reinforcing material for concrete and comprising a multitude of relatively short and substantially straight steel flakes. The steel flakes are of a shape tapering towards the ends of the flakes, and they have a thickness of about 0.1 mm to about 0.5 mm, a maximum width of at least about ten times the thickness, but at least about 2 mm, and a length of at least about 100 times the thickness. They are intended to be uniformly distributed and in principle randomly orientated in the concrete. The most preferred dimensions are: thickness 0.1 to 0.2 mm, maximum width 4 to 6 mm, and length 20 to 80 mm.

Abstract: An improved reinforcing material for concrete is manufactured by causing molten steel to impinge upon a relatively cold metal surface of great cooling capacity, moving rapidly substantially across the direction of delivery of the molten steel, to form at least one discrete relatively thin flake-shaped layer of molten steel on the metal surface, causing the layer to solidify on said metal surface to form a steel flake, and mutually adjusting the parameters which determine the shape and the dimensions of the steel flakes so as to give the flakes a shape tapering towards the ends of the flake and a thickness of about 0.1 mm to about 0.5 mm, a maximum width of at least about ten times the thickness but at least about 2 mm, and a length of at least about 100 times the thickness.

Abstract: A ball bushing which comprises a sleeve and a shaft, and balls arranged therebetween. The balls are guided in a cage and, between the sleeve and shaft there are arranged load-carrying strips for the balls, characterized in that the sleeve of the ball bushing is shaped with a number of preferably circular envelope surface extending ridges showing a continuous cross-section basic profile. The interior of the sleeve is of polygon shape and in the middle of the polygon surfaces there are the apertures provided with a bottom intended to receive load-carrying strips for the balls in the loaded zone and also intended to center the cage element which in a corresponding manner is of polygon shape.

Abstract: Sponge iron is produced by a process including a charging step during which an iron oxide is arranged as a stationary bed in a furnace chamber, a heating step during which a hot, preferably non-reducing atmosphere is cased to flow through the stationary bed, and a reduction step during which a hot reducing atmosphere is caused to flow through the stationary bed to reduce the iron oxide to sponge iron. Optionally, there is a final cooling step during which cold non-oxidizing atmosphere cools the sponge iron. The relatively hot atmosphere which has just passed through the stationary bed is counter-currently heat exchanged with the relatively cool fresh atmosphere about to enter the furnace chamber.

Abstract: A roller bearing provided with flanges and having an inner ring, an outer ring and roller elements therebetween, sealed to prevent penetration of foreign matter, and constructed so that at least one of the rings is integral with two flanges extending on either side of the ring.

Abstract: Wheel bearing application, including same for a wholly unloaded, rigid rear shaft, comprising drive means arranged in a sleeve portion for transferring torsional movement from a drive shaft and a bearing consisting of a moment-carrying, play-adjusted, rigid inner-ring-rotated roller bearing. The inner ring comprises two directly adjacent separate rings that are fitted on the sleeve portion and an outer ring of one piece, with rolling bodies arranged between the inner and outer rings.