FEDERAL-MOGUL BURSCHEID GMBH Patent applications |
Patent application number | Title | Published |
20140165826 | OIL SCRAPER RING - An oil scraper ring, comprising a base body having a radially outer running surface, a radially inner circumferential surface, and an upper and a lower flank, the ring having at least two running surface lands, which are provided with a wear-resistant layer if needed and which, proceeding from the base body, are conically tapered at a predeterminable flank angle, radially in the direction of the ends thereof facing a counter running surface, forming limbs, and, proceeding from an oil chamber-side region, the free ends of the running surface lands being designed to be slanted at least in some regions in the direction of a combustion chamber-side region, wherein the respective transition regions from the slanted region of the running surface land into the limbs on the one hand, and from the limbs into the base body on the other hand, are rounded, the slanted region of the running surface land being operatively connected to a cylindrical section that extends in the direction of the oil chamber-side region, the radius of the scraping edge in the cylindrical section being 0.02 to 0.2 mm, the flank angle being ≦18°, and the width of the respective cylindrical section being <0.15 mm. | 06-19-2014 |
20140076265 | PISTON RING FOR TWO-STROKE ENGINES - A piston ring system, having an internal diameter >400 mm, for a piston of a two-stroke internal combustion engine, includes at least a first and a second piston ring each having a convex running surface with a crest of the convexity in contact with a cylinder wall and each being inserted into a respective first and second piston ring groove in the piston, wherein the first piston ring faces a combustion chamber and the second piston ring is disposed axially beneath the first piston ring, and wherein the crest of the convexity of the first piston ring is disposed beneath a radial plane passing through a midpoint of axial height of the first piston ring, and the crest of the second piston ring is disposed above a radial plane passing through a midpoint of axial height of the second piston ring. | 03-20-2014 |
20130341871 | SLIDE RING SEAL - A slide ring seal, and in particular a running gear seal, including an angled slide and/or counter ring, the radial leg of which is provided with a sliding surface and the axial leg of which forms a seating for a trapezoidal sealing element, wherein the outer ends of the axial leg have recesses, into which engage projections on the sealing element to form anti-rotation locks, wherein the transition area from the axial leg to the radial leg of the slide and/or counter ring provided beyond the sliding surface has a profiling, into which a section of the sealing element having an approximately corresponding construction engages. | 12-26-2013 |
20130320628 | SLIDE RING SEAL - The invention relates to a slide ring seal, and in particular a running gear seal, including an angled slide ring and/or counter ring, the radial leg of which forms a sliding region, and the axial leg of which forms a. seating for a trapezoidal sealing element, which radially outside of the sliding region, is provided with a projection that at least partially overlaps the radial leg, forming a secondary seal, wherein at least in the region of the radial leg, the projection is provided with a profile, which is supported on the outer circumferential surface of the radial leg, forming anti-contamination lips in the installed state of the slide ring seal, and in particular running gear seal, that profile being supported on the outer circumferential surface of the radial leg When viewed in the axial direction. | 12-05-2013 |
20130318760 | ASSEMBLY TOOL FOR MECHANICAL SEALS - An assembly tool for inserting a slide ring or counter ring of a slide ring seal, in particular a running gear seal, cooperating with an elastic sealing body into an associated housing part, the assembly tool including a number of clamping elements formed as arcuate segments and an assembly O-ring, wherein the clamping elements engage around the slide ring or counter ring, and around the sealing body and the assembly O-ring in a manner that corresponds to the circumferential length thereof, and the clamping elements are advanceable in the direction of the housing part in order to mount the sealing body within this housing part. | 12-05-2013 |
20130307221 | PISTON RING - A piston ring, in particular a compression piston ring, includes a main body, which has a radially outer running surface, a radially inner circumferential surface, an upper and a lower flank surface, and a joint, wherein the ruining surface is provided with at least one circumferential recess which receives a wear-resistant coating, in particular a PVD coating, and wherein, starting from respective end faces of the joint, as seen in the circumferential direction of the main body, a land Shoulder is integrally formed on the main body outside the coating and extends at a predetermined radial height over a predetermined circumferential length on both. sides of the joint. | 11-21-2013 |
20130187341 | METHOD FOR PRODUCING A PISTON RING - Method for producing a piston ring having an axial height <2 mm, said piston ring having a radially outer running surface provided with at least one rail, a radially inner circumferential surface, and upper and lower flank surfaces extending therebetween, wherein said rail is provided with a contour that is tapered radially outwardly, thereafter the running surface, together with the flanks of the tapered rail, is provided with at least one wear-resistant layer, and then only the flank of the rail that is to form a scraping edge is subjected to at least partial material removal to form the scraping edge. | 07-25-2013 |
20130187340 | METHOD FOR PRODUCING A PISTON RING - A piston ring is produced by providing a metallic main body, at least including a radially outer running surface, a radially inner circumferential surface and upper and lower flank surfaces interposed therebetween, with a defined taper in the region of an approximately cylindrical running surface, providing at least the running surface with at least one wear-resistant layer, and removing the at least one wear layer in the region of the entire circumference of the ring that forms a scraping edge forming a land having a predefinable width. | 07-25-2013 |
20130174419 | METHOD FOR PRODUCING A PISTON RING - Method for producing a piston ring provided with a butt joint, in that an annular metallic main body is provided with at least one hard layer at least in the area of the outer circumferential surface of said main body, wherein after this coating the inner circumferential surface of the piston ring is at least partially subjected to a wall-thickness-reducing material removal process. | 07-11-2013 |
20130168906 | Helical Compression Spring for an Oil Scraper Ring of a Piston in an Internal Combustion Engine and Method for Coating a Helical Compression Spring - A helical compression spring, preferably of steel, in particular CrSi steel or CrNi steel, comprises a coating which has at least one a-C:H: Me coating or a plurality of layers of CrN ( | 07-04-2013 |
20120090462 | NITRATABLE STEEL PISTON RINGS AND STEEL CYLINDRICAL SLEEVES, AND CASTING METHOD FOR THE PRODUCTION THEREOF - A steel piston ring and a steel cylinder liner are described which comprise as the main body a steel composition which has good nitridability. The steel composition consists of the following elements: 0-0.5 weight % B, 0.5-1.2 weight % C, 4.0-20.0 weight % Cr, 0-2.0 weight % Cu, 45.30-91.25 weight % Fe, 0.1-3.0 weight % Mn, 0.1-3.0 weight % Mo, 0-0.05 weight % Nb, 2.0-12.0 weight % Ni, 0-0.1 weight % P, 0-0.05 weight % Pb, 0-0.05 weight % S, 2.0-10.0 weight % Si, 0-0.05 weight % Sn, 0.05-2.0 weight % V, 0-0.2 weight % Ti and 0-0.5 weight % W. The steel piston ring and the steel cylinder liner can be manufactured in a casting process using the machinery and technology employed for the manufacture of cast iron parts. | 04-19-2012 |
20120018051 | NITRATABLE STEEL MATERIAL COMPOSITION FOR PRODUCING PISTON RINGS AND CYLINDRICAL SLEEVES - A steel composition which has good nitridability, in particular for the manufacture of piston rings and cylinder liners, contains the following elements in the following quantities expressed with respect to 100 weight % of the steel composition: 0.5-1.5 weight % Al, 0.5-1.2 weight % C, 68.2-96.9 weight % Fe, 0.1-3.0 weight % Mn and 2.0-10.0 weight % Si. It can be manufactured by producing a melt of starting materials and casting the melt into a prepared mould. Nitriding the steel composition obtained results in a nitrided steel composition produced by gravity casting manufacturing with properties that surpass those of hardened and tempered spheroidal graphite. | 01-26-2012 |
20110311391 | STEEL MATERIAL COMPOSITION FOR PRODUCING PISTON RINGS AND CYLINDER SLEEVES - The invention relates to a steel material composition, in particular for producing piston rings and cylinder sleeves, containing the following elements in the given fractions in relation to 100% by weight of the steel material: 0.5-1.2% by weight C, 2.0-20.0% by weight Cr, 49.0-97.1% by weight Fe, 0.1-3.0% by weight Mn, 0.1-3.0% by weight Mo, 0.-7.0% by weight Nb, 2.0-10.0% by weight Si, 0-7.0% by weight Ti, 0.-7.0% by weight V and 0.-0.5% by weight W, the sum of the fractions of Nb, Ti, V and W being 2.0-7.0% by weight. Said composition can be produced by melting the starting materials and casting the melt in a pre-fabricated mould. | 12-22-2011 |
20110115167 | STRUCTURED CHROME SOLID PARTICLE LAYER AND METHOD FOR THE PRODUCTION THEREOF - A structured chromium solids particles layer with a network of cracks in which solids particles are embedded, wherein the crack density is 10-250 per mm, the particle size of the solids particles lies in the range of from 0.01-10 μm, the proportion of solids particles in the overall layer is 1-30 vol.-% and the chromium solids particles layer has a microstructure with depressions in the surface of the layer, wherein the proportion of the surface area accounted for by the depressions is 5-80%. A method for producing the structured chromium solids particles layer on a workpiece includes introducing the workpiece into an electrolyte containing a Cr(VI) compound and electrolytically depositing a chromium layer at a current density of 20-100 A/dm | 05-19-2011 |
20100112376 | PRODUCTION OF STRUCTURED HARD CHROME LAYERS - A method of producing a structured hard chrome layer is described, wherein chromium is deposited from an electrolyte onto a workpiece, said electrolyte containing: | 05-06-2010 |
20100019458 | PISTON RING - A piston ring, having a base body, which comprises a substantially circumferential running surface, an upper and a lower flank surface, and an inner circumferential surface, wherein the transitional region of the running surface is provided with an edge ≦0.1 mm in the lower flank surface, and the running surface is provided with at least one PVD cover layer ≦10 μm. | 01-28-2010 |