Abstract: Method of oil and gas tightly fastening a diaphragm made of an elastomer material with respect to the tappet as well as the adjusting element within a hydrostatic valve clearance adjusting device and configuration of the same. Clamping rings are form-lockingly connected with the fastening end of the diaphragm already during the vulcanization process. The thus manufactured installable unit is fixed in the tappet in the correct position orientation by means of an installation tool. Moreover, the structural configuration of the clamping rings is described as well as that of the elastic diaphragm.

Abstract: A valve tappet assembly has a hollow tappet body, a valve clearance adjusting element spaced from the inner wall face of the tappet body and having a circumferential groove, an elastomer annular diaphragm having an outer edge zone adjoining the inner wall face of the tappet body and an inner edge zone adjoining the outer face of the valve clearance adjusting element, a first radially inwardly projecting circumferential rib provided at the inner edge zone and received in the circumferential groove; an outer and an inner clamping ring circumferentially pressing the outer edge zone against the inner wall face at the tappet and, respectively, the inner edge zone against the outer wall face of the valve clearance adjusting element to provide respective circumferential sealing zones; and a second radially inwardly projecting circumferential rib in the inner edge zone, situated adjacent the first rib and being pressed into circumferential engagement with the outer wall face of the valve clearance adjusting element a

Abstract: A piston ring assembly has an expander spring of sheet material bent into an annular configuration. The expander spring has a circumferential series of radially oriented tongues and each tongue has an approximately axially bent leg. The tongues and legs are defined by stamped-out slots provided in the expander spring in an alternatingly radially inwardly and radially outwardly oriented circumferential series. The expander spring has stamping burrs bounding the slots. The piston ring assembly further has two laminar oil scraper rings arranged generally concentrically with respect to the expander spring. The laminar oil scraper rings are axially supported by the tongues and are radially supported by the legs. The burrs are situated such that they are submitted solely to compression forces derived from bending stresses generated as a result of bending the spring into the annular configuration.

Abstract: Oil scraping piston ring of profiled steel having punched-in oil vent holes. To keep at a minimum the bulging at the holes developed during coiling, the oil vent holes are given an elliptical or rhombic outline.

Abstract: A flat sealing gasket includes an opening defined by a gasket edge and a sheet metal armor framing the gasket edge. The armor at least partially encloses an annular space which is situated radially inwardly of the gasket edge and is generally concentric with the gasket opening. Further, a graphite filling is accommodated in the annular space.

Abstract: A sealing ring, having a ring body made, for example, of high-temperature resistant compressed metal fibers includes a roughened surface adapted to be pressed against and displaced by sliding relative to a counter-face.

Abstract: A cylinder head gasket for use in an internal combustion engine having a cylinder head accommodating a precombustion chamber block having a bottom face, one part of which is adapted to engage the cylinder head gasket. The cylinder head gasket has an opening adapted to be aligned with a combustion chamber of the internal combustin engine. There is provided a space in the cylinder head gasket adjacent the opening of the cylinder head gasket. The space is adapted to be in alignment with the bottom face of the precombustion chamber block and is occupied at least in part by a component of a high-temperature resistant material.

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: An apparatus for regulating the length of divisional spacings of a metal band comprises at least two workpiece conveying roller pairs spaced from one another in the direction of the workpiece length and arranged for holding and advancing the workpieces in the direction of workpiece length; a scanning device for determining the actual length of the workpieces during the conveyance thereof by the workpiece conveying devices; an evaluating device receiving, from the scanning device, signals representing the actual lengths of the workpieces; and a length correcting device receiving, from the evaluating device, signals representing correctional values and for varying the length of the workpieces at a location between the roller pairs as a function of the correctional values. A heat treatment device heats the running band to a temperature sufficient to maintain the band in a red-hot state at the length-correcting location.

Abstract: A soft gasket material comprising an asbestos-free fiber material containing fibers and an organic binder, the soft gasket material being comprised of a fiber sheet containing at least three different intermixed types of fibers, namely (a) natural organic fibers, (b) synthetic organic fibers, and (c) at least one fiber type selected from mineral fibers and metal fibers, and being additionally comprised of powdered to finely fibrous fillers and at least one organic binder.

Abstract: A soft substance gasket material preferably made of a metal reinforced fiber mat is impregnated with a silicone impregnating agent comprising a mixture of a polysiloxane having reactive hydrogen groups such as a polyhydrogen siloxane, an addition cross-linking polysiloxane such as a methyl vinyl siloxane, and cross-linking catalysts, preferably in the form of only one organic metal compound. In spite of having small quantities of addition cross-linking polysiloxane and cross-linking catalysts, the impregnated seals are not tacky after cross-linking, they are easy and inexpensive to manufacture, and they evidence improved functional characteristics such as improved resistance to hot media, temperature and aging when compared with seals impregnated with only one type of polysiloxane.

Abstract: An elastic shaft coupling for transmission of torque between two shafts. The coupling includes a polygonal rubber ring and a hub spider having a plurality of radially extending arms vulcanized in the rubber ring and being adapted for connection to the end of one shaft. Fastening elements are disposed between the arms of the hub spider and are vulcanized into the rubber ring. Each fastening element is also adapted for connection to the end of the other shaft. A centering device is provided in the region of the inner circumference of the hub spider for centering the shaft coupling relative to the one shaft.

Abstract: A piston-and-ring assembly includes a generally cylindrical piston, a circumferential groove provided in the piston and having a bottom and two radial flanks forming opposite sides of the groove; and an expander spring ring accommodated in the groove and including a plurality of generally radially extending tongues arranged in a circumferential series. Each tongue has, at a radially inward end, a leg portion extending at a first angle other than zero to the respective tongue from which it extends. An oil scraper annular lamina is situated in the groove and is supported axially by the tongues and is abutted radially by the leg portions. An extension forms part of each leg portion and is oriented thereto at an inclination. Each extension has a length which extends substantially from one of the flanks to the other.

Abstract: An impregnated, soft, flat sealing gasket and a method of manufacturing same which includes the steps of impregnating a fiber mat with a liquid, cross-linkable silicone impregnating agent which includes a cross-linking agent which forms radicals under the influence of heat; heating the silicone-impregnated fiber mat to cause at least partial cross-linking of the silicone impregnating agent; and irradiating the impregnated fiber mat with high energy radiation to cause cross-linking of the silicone impregnating agent present therein, whereby the silicone impregnating agent present in surface regions of the flat sealing gasket is cross-linked to a greater degree than obtainable by thermal treatment alone.

Abstract: Machining the circumferences of workpieces, particularly piston rings, in a variety of out-of-round contours and diameters requires only a single copying disc having a basic out-of-round contour. The copying disc is driven in synchronism with the angle of rotation alpha of piston rings to be machined by a direct current servomotor and, in order to generate the desired out-of-round contour, is caused to deviate from its synchronous movement by pulses received from a computer for the leading and lagging difference angles of rotation delta phi. An adjustable coupling member is provided between a copying disc sensor (such as a double lever) and the tool holder for transferring the out-of-round contour from the copying disc to the workpiece.

Abstract: A soft-material gasket formed of a non-woven fiber mat has pores which are at least partially filled with an impregnating agent. The impregnating agent is cross-linked by electron beam irradiation to locally differing degrees.

Abstract: A shaft seal assembly adapted for installation on and concentrically with a rotary shaft for sealing off a chamber laden with a gas/liquid mixture from a space situated externally of the chamber. The assembly has a chamber side and an air side and further comprises a sealing lip circumferentially surrounding a stationary part of the assembly; a labyrinth sealing ring situated axially adjacent the sealing sleeve on the chamber side of the assembly. The labyrinth sealing ring comprises a rotary wall component and a stationary wall component together defining a labyrinth gap formed of a plurality of consecutive axial and radial passages for guiding the mixture in a path having a plurality of radial and axial deflections.

Abstract: A sealing ring having at least one jacket face serving as a slide surface is produced of fibers and sliding agent that are passed to one another, with the fibers being relatively short fibers.

Abstract: An engine valve actuating mechanism includes a hollow reciprocating tappet, a tappet bottom arranged for engagement with a rotary cam of an engine cam shaft, a valve clearance adjusting device accommodated in the tappet and including a valve clearance adjusting element cooperating with the valve stem of the engine valve, a chamber within the tappet, filled with a hydraulic fluid, and an elastic diaphragm supported in the tappet and arranged for bounding and sealing the chamber. The diaphragm extends generally radially relative to the tappet axis between an inner circumferential wall surface of the tappet and the valve clearance adjusting element. The diaphragm has radially inner and radially outer circumferential zones. There are further provided first and second reinforcing elements supported in the tappet.

Abstract: An impregnated soft, flat sealing gasket made by a process including the consecutive steps of preparing a gasket material selected from the group consisting of organic fibers, inorganic fibers, synthetic fibers and mixtures thereof and a binder; forming a fiber mat from the gasket material; impregnating the fiber mat with a cross-linkable impregnating agent and at least partly cross-linking the impregnating agent in the fiber mat; and adding to the fiber material, in a fine distribution therein, a duromer synthetic resin prior to the impregnating step and as early as simultaneously with the preparing step.