Abstract: An axial sealing system of a rotary piston engine with a triangular piston and a dual-arc casing runway surfacing with which a seal body arranged in axial groove or groove bore cooperating sealingly after each axial sealing strip at a preceding end thereof for sealing therewith and the preceding sealing plug under gas pressure from the working or operating chamber. The sealing body is a second sealing plug cut into by the sealing strip and the first sealing plug. Also this can be a sealing strip segment having a configuration that fits with respect to the cutout of the sealing strip and the first sealing plug.

Abstract: For motor-driven chain saws, there is the danger that the chain saw will be kicked back if the reaction forces suddenly increase intensely in response to the forward thrust. This kickback effect and the danger of accident associated therewith are intended to be reduced by means of a special configuration of the saw chain. The saw chain has drive links which have an approximately triangular shape and which engage the tooth gaps of the nose sprocket with inclined flanks. The drive links are configured to be asymmetrical with respect to a partition line running between the two pivot axes of the link so that the forward flank angle is greater than the rearward flank angle referred to the partition line. The two flank angles together are greater than the opening angle of the V-shaped tooth gap of the nose sprocket.

Abstract: Friction-reducing coating compositions and coated machine parts having a wearing surface provided with coatings of same. In one embodiment, the coating composition includes from 10 to 25 weight % molybdenum metal; from 55 to 70 weight % nickel alloy; and from 5 to 25 weight % chromium carbide Cr.sub.3 C.sub.2. In a second embodiment, the coating composition includes from 25 to 45 weight % molybdenum metal; from 45 to 60 weight % nickel alloy; and from 5 to 25 weight % of a hard substance selected from chromium metal, chromium carbide Cr.sub.23 C.sub.6 and molybdenum carbide Mo.sub.2 C. Preferably the nickel alloys contain from 73 to 95 weight % nickel and have a melting point below that of nickel metal. Preferably the friction-reducing coating is applied to a wearing surface by plasma flame spraying. These coatings impart excellent wear resistance to the wearing surface, while lowering wear of counter-running faces.

Abstract: With motor-driven chain saws, there is the danger that the chain saw will be thrown upwardly and rearwardly when it is applied to wood by the user with a forward thrust. Serious injuries can then occur. The invention is directed to a motor-driven chain saw which is so configured that the cutting forces are automatically reduced in response to the occurrence of excessive reaction forces so that the reaction force is immediately reduced to a tolerable amount thereby eliminating the kickback effect. The drive links engaging the nose sprocket of the guide bar are so dimensioned that they can further pivot in the tooth gaps of the nose sprocket out of their normal position and, in this way, take the cutting links with them in such a manner that the free angle of the cutting teeth is reduced. The drive links are latched in the pivoted-in position on the nose sprocket in order to assure that the cutting links will retain the position with the reduced free angle over the entire turnaround region of the guide bar.

Abstract: With motor-driven chain saws, there is the danger that the chain saw will be thrown upwardly and rearwardly when it is applied to wood by the user with a forward thrust. Serious injuries can then occur. The invention is directed to a saw chain which is so configured that the cutting forces are automatically reduced in response to the occurrence of excessive reaction forces so that the reaction force is immediately reduced to a tolerable amount thereby eliminating the kickback effect. The drive links of the saw chain which engage into the nose sprocket of the guide bar are so dimensioned that they can further pivot in the tooth gaps of the nose sprocket out of their normal position and, in this way, take the cutting links with them in such a manner that the free angle .alpha. of the cutting teeth is reduced.

Abstract: Wear-resistant coating on a machine part which is subject to friction wear, the coating being applied by a flame spray process and being composed of a plurality of superposed sprayed-on layers each differing in structure or composition from each layer adjacent thereto.

Abstract: A spray powder for the production of wear resistant coatings on the bearing and friction faces of machine parts subjected to sliding friction, comprising 20 to 60 weight percent molybdenum, 25 to 50 weight percent molybdenum carbide and up to 30 weight percent of a low melting point alloy.

Abstract: A sprayed-on wear-resistant coating which is carried on a substrate constituted by a machine part surface, has an inner face oriented towards the substrate and an outer face oriented away from the substrate. The coating consists of a material whose structure and/or composition continuously varies from the inner face of the coating towards the outer face thereof.

Abstract: A spray powder for the manufacture of wear resistant and temperature resistant coatings, the powder comprising 50 to 90 weight percent aluminum oxide (Al.sub.2 O.sub.3) and 5 to 40 weight percent titanium dioxide (TiO.sub.2) with additives in the form of 5 to 30 weight percent lanthanum oxide (La.sub.2 O.sub.3) and/or niobium oxide (Nb.sub.2 O.sub.5), possibly together with 30 weight percent calcium carbonate (CaCO.sub.3).

Abstract: The drive for rotating the drum of a vehicular cement mixer includes a mechanical power train mounted in a first chamber of a drive housing and a hydrostatic motor disposed in a second housing chamber substantially surrounded by yet another chamber defined in part by an outer wall of diecast aluminum formed on an outside surface with a plurality of outwardly extending fins and on an inside surface with a plurality of support plates connected to an inner housing well defining the inner chamber. The outer chamber communicates with the inner chamber by means of an overflow outlet at the top of the inner housing wall, oil escaping from the inner chamber via the outlet flowing down the support members to the inner surface of the outer housing wall.

Abstract: Apparatus for guiding and clamping an elongated flexible rope comprises a body supporting a plurality of rotatively mounted guide rollers aligned for guiding said rope in a plane. One of said guide rollers is mounted on said body adjacent a tension end of the rope and is selectively lockable against rotation. The other guide roller is mounted on said body adjacent a portion of the rope that is looped around for tension and is mounted for movement toward and away from said first guide roller so that rope passing around both guide rollers and extended between adjacent portions thereof may be pressed into a clamped position when the second guide roller is moved toward said first guide roller. The rope is released upon movement of the second roller in an opposite direction. Anchor means is provided for securing said body to pivot about a fixed point between a rope clamping position and a rope releasing position, and a hook element is provided for securing the body in the rope clamping position.

Abstract: A wheel drive comprises a hollow wheel support having a projection and in which is housed an axial-piston hydraulic motor having an output shaft connected via planetary gearing to the hub. To this end the projection is provided with mounting pins constituting the planet carrier of a first set of planet gears which mesh with a ring gear formed integrally inside the hub and with a sun gear that may be provided directly on the motor output shaft or that may be the output of a second set of planetary gears whose planet gears mesh with the ring gear of the hub and whose sun gear is connected to the motor output shaft. A clutch can be provided on this motor output shaft to disconnect it from the respective sun gear, and the inner end of the motor shaft may be acted on by a wheel brake.

Abstract: A wheel drive for a piece of construction equipment or the like has a hydraulic motor mounted in a wheel support on which is rotatable the wheel-carrying hub. The output shaft of the motor is connected to one member of a clutch whose other member is connected to a two-stage planetary-gear transmission whose output gear is a ring gear integrally formed in the wheel hub. The clutch is pneumatically actuatable through a passage extending axially through the motor shaft.

Abstract: A nuclear reactor installation includes a core catching apparatus for containing the components of a nuclear reactor core during a core melt-down accident which comprises a container provided with means for preventing the mixing of the metallic portion of the core melt with water thereby to avoid formation of explosive gases and spreading of radioactive compounds by an explosion following such core-melt-down-accident.

Abstract: A condensation product obtained by first preparingA. an addition product of aliphatic aldehydes and phenol in a molar ratio of about 1 : 1 to 3 : 1, at temperatures in the range of from about 50.degree. to 80.degree. C, in the presence of an alkaline catalyst,And separately therefromB. a block polymer, obtained from a polypropylene glycol having a molecular weight from about 1500 to 2500 by the addition of about 30 to 50% by weight of ethylene oxide in the presence of an alkaline catalyst,And subsequentlyC. condensing about 0.5 to 4 moles of a) with 1 mole of b), after previous neutralization, if necessary in the presence of inert solvents, at 80.degree. to 150.degree. C, and removing the reaction water formed,And its use as demulsifying agent for the separation of water from crude oil emulsions.

Abstract: An ejector for the transport container of a missile is used in a missile launcher. The missiles are launched from the container which is then ejected by an ejector mechanism from the launcher proper. The ejector comprises a pair of axially spaced pivoted levers and first spring means for imparting an ejecting movement to said levers and second spring means for returning the levers to a ready position to receive another missile in its container.

Abstract: A roller bearing for the shaft of a cement-mixer drum, universally jointed on a stub shaft of a planetary-gear train driving the drum shaft through a gear coupling with arcuate teeth, has an inner race fixed to the drum shaft and an outer race secured to a surrounding transmission housing, this outer race being axially split into two halves each accommodating a set of barrel-shaped rollers. The two sets of rollers are held in respective cages, peripherally offset from each other, and are engaged by toroidal inner surfaces of the two race halves curved about the center of rotation of the universal joint; these race halves extend axially beyond the end faces of the inner race to allow for a swing of more than .+-.3.degree. from a midposition. The outer cage diameter exceeds the smallest diameter of each race half.