Abstract: A method of manufacturing a metallic valve housing by hydroforming a tube section in a die is provided. The die includes an upper part having a stamp and a lower part having a depression. The tube section is placed in the die, filled with a liquid, and subjected to a high internal pressure. Opposite walls of the tube section in a middle portion between two tube ends is shaped in that one side of the tube section is pressed inwards transversely to the axis of the tube section by the stamp to form a concave curvature, and the opposite wall is pressed into the depression in the lower part to form a flat.

Abstract: A method of manufacturing a metallic valve housing by means of hydroforming a tube section in a die including an upper part having a stamp, a lower part having a depression, the tube section being placed in the die, filled with a liquid, and subjected to a high internal pressure, and opposite walls of the tube section in a middle portion between two tube ends being shaped in that one side of the tube section is pressed inwards transversely to the axis of the tube section by means of the stamp to form a concave curvature and the opposite wall is pressed into the depression in the lower part to form a flat.

Abstract: A hierarchical network management system is described which includes concentrators (2A to 5A) on the individual levels (E1 to E3) of the hierarchy as well as adjustable interfaces in the concentrators for point-to-point and bus connections. An interface is provided for a bus connection on a master side. The interface takes delays into consideration. A transmission channel can be connected to the interface. The channel includes a forward bus and return line (a5, b5). Parallel addressable apparatus (8A, 8B, 8C) can be connected to the forward and return lines. A controllable change-over switch (A8, B8, C8), inserted in the return line (b5) of the transmission channel, is provided for each addressable apparatus (8A, 8B, 8C) of the parallel combination.

Abstract: Hydrophilic silicone rubber article, the surface of which is hydrophilized partly or completely by reaction (equilibration reaction) with organosiloxanes, the organosiloxanes being synthesized by the reaction of SiH-group-containing siloxanes with allyl compounds which contain protected OH groups. These articles are particularly useful as contact lenses and intraocular lenses.

Abstract: A modified silicone rubber with dimethylsiloxane and urethane units in the main chains, which are cross linked through methyl groups. This material is hydrophilic and suitable as a contact lens material.

Abstract: A vertically arranged filter drum (6) is installed in the feed chamber (2) of the cylindrical housing (1) of the filter, this drum having a closed upper end and an open lower end. The filter drum (6) consists of an outer (13) and an inner (14) supporting basket exhibiting a screen (15) with passage openings for the liquid to be filtered, as well as of a filtering basket (16) disposed between the two supporting baskets (13, 14), the filtering basket being made of a filter material, for example perforated sheet metal. The filter drum (6) is rotationally driven by a shaft (10), supported in a post (8) on the filter housing (1), and by a motor (11) and is seated with its lower open end with running clearance in the discharge chamber (4) of the filter housing (1). The liquid to be purified enters the feed chamber (2) of the filter (1) via the inlet (3), and the purified liquid leaves the filter through the outlet (5) of the discharge chamber (4).

Abstract: A wear liner is provided for the roof of the pedestal jaw of a side frame. The liner is welded in place only along the lateral edges of the liner and is retained in place, in the event of weld failure, by depending legs engageable with pedestal jaw stop lugs. Additional retaining lugs may be provided in the pedestal jaw roof.

Abstract: A wear liner is provided for the roof of the pedestal jaw of a side frame. The liner is welded in place only along the lateral edges of the liner and is retained in place, in the event of weld failure, by depending legs engageable with pedestal jaw stop lugs. Additional retaining lugs may be provided in the pedestal jaw roof.