| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 277440000 | Piston ring surface of dissimilar material or hardness | 44 |
| 277442000 | Surface coating, plating, or impregnation | 44 |
| 20100044967 | PISTON RING - The invention relates to a piston ring, having a base body, which comprises a running surface provided with a chamber, an upper and a lower flank surface, and an inner circumferential surface, wherein at least the chamber is provided with at least one wear protection layer, and a PVD cover layer is applied to the running surface at least in some regions such that the base body has the PVD cover layer only in the edge regions, which is to say outside of the chamber, in the finished state. | 02-25-2010 |
| 20130113164 | PISTON RING WITH A WEAR-RESISTANT COBALT COATING - A piston ring is provided having a bottom surface, a top surface, an inner diameter surface and at least one running surface. A wear protection coating substantially entirely of cobalt is applied to the at least one running surface to protect the base material of the piston ring. Specifically, during operation of an engine, the more durable cobalt wear resistant coating, not the base material which may be steel or cast iron, is in sliding contact with a cylinder wall. The cobalt coating may be applied through, for example, electrodeposition or plasma spraying. | 05-09-2013 |
| 20120235359 | OIL RING FOR INTERNAL COMBUSTION ENGINE - An oil ring for an internal combustion engine is provided that can prevent adhesion and deposition of oil sludge even during long-time operation of the engine, can thereby prevent the occurrence of sticking of the oil ring components to each other, and can maintain a good oil control function. At least part of the surface of the oil ring for an internal combustion engine is coated with a metal coating having a surface free energy of 40 mJ/m | 09-20-2012 |
| 20090278320 | Piston ring with chromium nitride coating for internal combustion engines - The invention relates to a piston ring for internal combustion engines, the piston ring comprises a steel or cast iron base material with a coating of chromium nitride deposited by a physical vapor deposition process on a sliding surface of the piston ring, wherein the coating is composed of a columnar crystal structure of CrN with the following features:
| 11-12-2009 |
| 20120068418 | GLIDING ELEMENT - The invention relates to a gliding element of an internal combustion engine, especially a piston ring, having a DLC coating of the ta-C type which has at least one residual stress gradient. | 03-22-2012 |
| 20090051123 | PISTON RING - A piston ring includes a piston ring body and a surface coating film formed on at least one of upper and lower surfaces of the piston ring body. The surface coating film has a most outside surface layer including a heat-resistant resin and a metal powder contained in the heat-resistant resin and a base bottom layer formed nearest the piston ring body and including a heat-resistant resin. The base bottom layer may also include a metal powder. | 02-26-2009 |
| 20110140367 | NOVEL COATING HAVING REDUCED STRESS AND A METHOD OF DEPOSITING THE COATING ON A SUBSTRATE - A method of depositing a coating on a substrate, the method comprising the steps of: (a) depositing material on a substrate by performing a cathodic vacuum arc (CVA) deposition step; and (b) depositing material on a substrate by performing a physical vapor deposition (PVD) step that excludes CVA deposition wherein the thickness of the material deposited in step (a) is greater than the thickness of material deposited in step (b). | 06-16-2011 |
| 20120126487 | SLIDING MEMBER HAVING A THERMALLY SPRAYED COATING AND METHOD FOR PRODUCING SAME - A sliding member for an internal combustion engine includes: a substrate and a coating obtainable by thermally spraying a powder, having the element proportions of 55 to 75 wt % of chromium, Cr; 3 to 10 wt % of silicon, Si; 18 to 35 wt % of nickel, Ni; 0.1 to 2 wt % of molybdenum, Mo; 0.1 to 3 wt % of carbon, C; 0.5 to 2 wt % of boron, B; and 0 to 3 wt % of iron, Fe. | 05-24-2012 |
| 20110101620 | PISTON RING - A piston ring with a DLC coating comprises an adhesive layer on a base material from inside to outside, an amorphous metallic hydrocarbon layer and an amorphous non-metallic hydrocarbon layer, wherein primarily sp | 05-05-2011 |
| 20090001669 | Sliding Element, in Particular Piston Ring, Method for Manufacturing a Sliding Element, Sliding System and Coating for a Sliding Element - A sliding element comprises at least one surface for sliding contact with a running face, wherein a wear layer and a run-in layer made from carbon are applied to the surface, and is characterized in that the run-in layer comprises hydrogen and nanocrystalline carbide phases. In a method for manufacturing a sliding element, the run-in layer is applied by means of a PVD process. A sliding system has an above-described sliding element and a body having a running face. A coating for a sliding element comprises a wear layer which can be applied to the upper side of the sliding element, and a run-in layer which is configured as a carbon layer, and is characterized in that the run-in layer comprises hydrogen and nanocrystalline carbide phases. | 01-01-2009 |
| 20100019457 | PISTON RING - A piston ring having a base body, which comprises a running surface provided with at least one chamber, an upper and a lower flank surface, and an inner circumferential surface, wherein the running surface is provided with at least one PVD layer such that the same is adjusted to the contour of the running surface without completely filling the chamber, wherein the respective edge region is provided with a layer thickness, b that is reduced compared to the layer thickness, a of the chamber as a function of the configuration of the chamber. | 01-28-2010 |
| 20100140880 | PISTON RING - A piston ring mounted in the ring groove of an aluminum alloy piston does not cause aluminum adhesion during the long-term use. The piston ring includes a resin film deposited on at least one of an upper face and a lower face. The resin film contains from 0.5 to 20% by volume of carbon black particles and from 3 to 30% by volume of solid lubricant particles with respect to the total volume of the resin film. The carbon black particles preferably contain one or both of graphitized carbon black particles and composite graphite black particles. | 06-10-2010 |
| 20090174150 | LATERAL SIDE PROTECTION OF A PISTON RING WITH A THERMALLY SPRAYED COATING - A piston ring is disclosed that includes a radially extending upper surface, a radially extending lower surface, a radially innermost surface extending between the upper surface and the lower surface, and a radially outermost surface extending between the upper surface and the lower surface. The lower surface includes a thermally sprayed coating, and both the radially outermost surface and the upper surface lack the coating. Accordingly, the thermally sprayed coating may generally be applied solely to the lower radially extending surface of the ring. | 07-09-2009 |
| 20120306158 | SLIDING ELEMENT HAVING ADJUSTABLE PROPERTIES - A sliding element, particularly a piston ring for an internal combustion engine, includes a substrate, and a wear-protection layer, obtained by thermal spraying of a powder comprising the element proportions
| 12-06-2012 |
| 20120205876 | PISTON RING - A piston ring is provided at its outer periphery with a sliding surface, wherein in a cross section thereof which is perpendicular to a radial direction of the piston ring, the sliding surface includes a first sliding surface which occupies a predetermined region from one end thereof, and a second sliding surface which occupies a region extending from one end to the other end of the first sliding surface, the first sliding surface is formed of hard film, the second sliding surface is not formed of hard film, and the second sliding surface exists at a position deviated inward from a phantom line extending from the first sliding surface toward the other end. | 08-16-2012 |
| 20120205875 | SLIDING ELEMENT, IN PARTICULAR A PISTON RING, HAVING A COATING - The invention relates to a sliding element, such as a piston ring, having a coating on at least one running surface, which comprises, from the inside out, an adhesive layer ( | 08-16-2012 |
| 20090058014 | PISTON RING - There is provided a piston ring which can effectively prevent aluminum adhesion phenomenon to the piston ring. The piston ring includes a piston ring main body and a surface coating film on either upper or lower surface of the piston ring main body, or both the upper and lower surfaces of the piston ring. The surface coating film includes heat-resistant resin and copper based powder contained therein. | 03-05-2009 |
| 20110309586 | COMPRESSION PISTON RING - A compression piston ring for an internal combustion engine, comprising a sliding surface formed by two ridges, upper and lower flank surfaces, and an inner circumferential surface, wherein the lower ridge runs at least in some regions parallel to the counter sliding surface and the upper ridge is designed as a taper faced Napier element. | 12-22-2011 |
| 277443000 | Nitrided | 17 |
| 20100044969 | PISTON RING FOR INTERNAL COMBUSTION ENGINES - The invention relates to a piston ring which is produced from a carrier material, especially steel or a cast material. The piston ring has a wear-resistant coating from a periodic multilayer system, every periodicity consisting of at least two individual metal nitride layers. The multilayer system has superlattice structures, the thickness of an individual layer being ≧2 nm to <15 nm and the thickness of the multilayer system being >4.5 μm and adjacent individual layers within the periodicity having different metallic elements. | 02-25-2010 |
| 20100044968 | PISTON RING FOR INTERNAL COMBUSTION ENGINES - The invention relates to a piston ring which is produced from a carrier material, especially steel or a cast material. The piston ring has a wear-resistant coating from a periodic multilayer system, every periodicity consisting of at least two individual metal nitride layers. Adjacent individual layers within the periodicity have different metallic elements. The thickness of an individual layer is ≧15 nm. | 02-25-2010 |
| 20130043659 | PISTON RING - Provided is a piston ring such that it is possible to sufficiently inhibit adhesive wear when the piston ring is mounted to a piston for a diesel engine in which at least the piston ring groove in the piston is formed from steel or cast iron. Disclosed is a piston ring mounted to a piston for a diesel engine, wherein the load length ratio (Rmr2) (in accordance with JIS B0601:2001) of the top surface and bottom surface of the piston ring satisfies each of the following conditions: Rmr2 (0.5%, 0.3[mu]m)=20% and Rmr2 (0.5%, 0.4[mu]m)=40%. | 02-21-2013 |
| 20130049304 | NITRIDED PISTON RING RESISTANT TO THE PROPAGATION OF CRACKS - This invention refers to the solution of problem of spalling of the nitrided layer in piston rings for Flex-fuel engines, without jeopardizing the wear resistance, suggesting for such purpose a nitrided piston ring ( | 02-28-2013 |
| 20100295251 | CHROMIUM NITRIDE ION-PLATING COATING AND ITS PRODUCTION METHOD, AS WELL AS PISTON RING USED FOR INTERNAL COMBUSTION ENGINE - [Task] The chromium nitride ion-plating coating has a property that it is hard but is liable to peel off. Year by year, the required level of wear resistance and scuffing resistance becomes higher in a diesel engine. The property of a coating is improved to enhance the wear resistance and scuffing resistance and also to improve resistance against peeling off. | 11-25-2010 |
| 20100001474 | Piston ring with sulphonitriding treatment - The present invention relates to a piston ring for an internal combustion engine, the piston ring comprises a sulphide rich compound layer forming a surface layer, said sulphide rich compound layer comprising an iron nitride matrix with iron sulphide (FeS) inclusions embedded in said matrix, said sulphide rich compound layer having a sulphur content of 1 to 4 wt % S and a nitrogen content of 10 to 20 wt % N. | 01-07-2010 |
| 20120091663 | Nitriding Grade Steel Material Composition for Manufacturing Piston Rings and Cylinder Liners - A steel material composition in particular for manufacturing piston rings and cylinder liners, which has a good nitriding capability, contains the following elements in the given proportion related to 100% by weight of the steel material composition: 0.5-1.2% by weight C, 4.0-20.0% by weight Cr, 45.30-91.25% by weight Fe, 0.1-3.0% by weight Mn, 0.1-3.0% by weight Mo, 2.0-12.0% by weight Ni, 2.0-10.0% by weight Si and 0.05-2.0% by weight V. It can be manufactured by manufacturing a melt of the starting materials and casting the melt into a prefabricated mould. Nitridation of the steel material composition which is obtained leads to a nitridized steel material composition which, by virtue of the manufacture with gravity casting, exceeds the properties of tempered cast iron with nodular graphite. | 04-19-2012 |
| 20090026712 | Sliding Member - A sliding member is characterized in that a sliding surface of the sliding member is coated with an amorphous hard carbon film, and a surface of the amorphous hard carbon film has a ten-point mean roughness of equal to or less than 0.7 micrometers and an initial wear height in a range of 0.07 to 0.14 micrometers. | 01-29-2009 |
| 20100253006 | STEEL PRODUCTS FOR PISTON RINGS AND PISTON RINGS - A steel product having a composition which contains by mass C: 0.01 to 1.9%, Si: 0.01 to 1.9%, Mn: 5.0 to 24.0% with balance consisting of Fe and unavoidable impurities and a steel product described above which further contains Cr: 18.0% or below and/or Ni: 12.0% or below in addition to the above essential elements. The above steel products may each further contain Al: 1% or below and/or N: 0.3% or below and the above steel products may each further contain one or more elements selected from among Nb, Ti, Zr, Mo and Cu in a total amount of 4.0% or below. The steel products can sufficiently follow the thermal expansion of a cylinder made of an aluminum alloy and thus enables the production of a piston ring which is suitable for use as a piston ring to slide on the inner face of a cylinder bore made of an aluminum alloy in an internal combustion engine and which can retain excellent sealing properties. | 10-07-2010 |
| 20120242047 | PISTON RING AND PISTON DEVICE - A piston ring which can sustain a superior effect of preventing aluminum cohesion for a long time in a high output engine is provided. At least one of the upper and lower side faces of a piston ring is coated with a polyimide film having hard particles dispersed therein. Employed as the hard particles may be alumina, zirconia, silicon carbide, silicon nitride, cubic boron nitride, or diamond. The hard particles are to be 0.01 to 5 μm in average particle diameter, and the film is 2 to 30 μm in thickness. | 09-27-2012 |
| 20100117304 | PISTON RING - A piston ring, having a base body, which comprises a substantially circumferential running surface, which has an upper and a lower flank surface, an inner circumferential surface, and a butt opening provided with defined butt clearance, wherein the transition of the running surface butt edge into the respective butt surface is configured as a sharp edge, and the running surface is provide with at least one PVD cover layer ≦10 μm at least up to the respective running surface butt edge. | 05-13-2010 |
| 20110148047 | Piston Ring For Internal Combustion Engine - The present invention refers to a piston ring for internal combustion engine, having an outer surface of a coating of Chromium Nitride (CrN and Cr | 06-23-2011 |
| 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 |
| 20100187765 | PISTON RING - In order to avoid burn traces on piston rings, it is proposed to provide the piston ring with a wear-protection coating which consists of a material with a thermal conductivity of at least 180 W/(m.K). At least 5% vol. of the wear-protection coating consists of aluminum nitride. | 07-29-2010 |
| 20120248710 | PISTON RING AND PROCESS FOR MANUFACTURING A PISTON RING - The present invention refers to a piston ring, particularly for use in the piston channel of an internal combustion engine or a compressor, comprising at least a substantially ring-shaped metallic base ( | 10-04-2012 |
| 20120261886 | MULTI-PIECE OIL RING - A multi-piece oil ring includes an oil ring main member in which two rails are connected together by a columnar part and which has a roughly I-shaped cross section; and a coil expander disposed in an inner circumferential groove formed on the inner circumferential surface of the columnar. Each rail in the oil ring main member possesses a sliding section protuberance whose tip possesses a jutting portion. The axial length of the jutting portion is 0.02-0.18 mm. The change rate of the axial length of the individual jutting portion is in the range of 0 to 80% at least in a region of from its sliding surface to be faced to a cylinder, which is positioned at the tip of the jutting portion, to a position of 0.03 mm away from the aforementioned sliding surface in the radial direction of the oil ring main member. | 10-18-2012 |
| 20120126488 | PISTON RING - There is described a piston ring, particularly devised for use in internal combustion engines or compressors, comprising at least a metallic base ( | 05-24-2012 |
| 277444000 | Chromium | 9 |
| 20100171272 | PISTON RING - Disclosed is a piston ring comprising a supporting material and a wear-resistant coating. The wear-resistant coating is composed of a ternary system A-B—N which is applied using a PVD process and in which A and B each represent an element form the group encompassing Ti, Zr, Hf, V, Nb, Ta, Cr, Mo W, Al, Si and C, wherein A ≠B and N represents nitrogen. The thickness of the wear-resistant coating amounts to ≧3 μm. | 07-08-2010 |
| 20100187766 | HARD CHROME LAYER, COATED SUBSTRATE, AND TRIBOLOGICAL SYSTEM - The present invention relates to a hard chrome layer, which is formed substantially by electrodeposition from an electrolyte containing a hexavalent chrome and which has fissures in which particles of hard material are intercalated. According to the invention, it is provided that the particles of hard material are formed from cubic boron nitride and have an average particle size of from 0.1 to 1.0 μm. The present invention also relates to a substrate with such a hard chrome layer and to a tribological system comprising a basic body and an opposing body in the form of such a substrate. | 07-29-2010 |
| 20100127462 | PISTON RING WITH A MULTILAYER ASSEMBLY, AND A METHOD FOR THE PRODUCTION THEREOF - The present invention relates to a piston ring with improved running-in and wear behaviour as well as to a method for the production thereof. According to a first embodiment, the piston ring comprises a ring body ( | 05-27-2010 |
| 20100066031 | PISTON RING - A piston ring, with a main body, which exhibits a contact surface, an upper and a lower side surface, and an inner circumferential surface, in which at least one of the side surfaces is provided at least with one PVD coating layer, to the effect that the layer thickness of the PVD coating layer tapers radially from the outside inward. | 03-18-2010 |
| 20110101621 | WEAR-RESISTANT COMPONENT - The present invention pertains to wear-resistant components for internal combustion engines, particularly piston rings, especiallly piston rings that feature a wear protection layer with iron base alloy on their surface that is subjected to wear and are characterized in that they are manufactured of a coating powder by means of high-velocity flame spraying (HVOF), wherein the coating is single-phase and comprises the elements Fe, Cr, V and C, and wherein VC forms mixed crystals and also leads to a dispersion strengthening. The present invention furthermore pertains to a method for manufacturing wear-resistant components for internal combustion engines, particularly piston rings, according to the present invention. | 05-05-2011 |
| 20110254230 | COATINGS AND POWDERS, METHODS OF MAKING SAME, AND USES THEREOF - This invention relates to thermal spray coatings, powders useful in deposition of the thermal spray coatings, methods of producing the powders, and uses of the thermal spray coatings, for example, coating of piston rings and cylinder liners of internal combustion engines. The coatings of this invention are applied by thermal spray deposition of a powder. The powder contains bimetallic carbides of chromium and molybdenum dispersed in a matrix metal. The matrix metal contains nickel/chromium/molybdenum. | 10-20-2011 |
| 20080203674 | Piston Ring Having Hard Multi-Layer Coating - A piston ring ( | 08-28-2008 |
| 20120248711 | PISTON RING - A piston ring which is provided with a carbon-based coating which has a low friction property and wear resistance, that is, a piston ring which has a carbon-based coating formed over its sliding surface, in which piston ring, the coating is a multilayer coating comprised of two types of layers having different hardnesses laminated in at least two layers, a hardness difference between the two types of layers is 500 to 1700 HV, a high hardness layer has the same or greater thickness than a low hardness layer, and the coating as a whole has a thickness of 5.0 μm or more. The high hardness layer has a thickness of 5 to 90 nm. The surface on which the coating is formed has a base material roughness of 1.0 μmRz or less. | 10-04-2012 |
| 20120319357 | METHOD FOR PRODUCING PISTON RINGS - A method for producing piston rings, in particular compression piston rings, in which at least one main element is machined in such a way that a circumferential surface serving as a running surface is provide with a wear-resistant layer of a predeterminable layer thickness, wherein a number of piston ring, in particular compression piston rings, brought together to form an assembly, are machined cylindrically in the region of their circumferential surface, a wear-resistant electrodeposited layer of chrome is applied to the finished machined cylindrical circumferential surface, so that the wear-resistant layer has a constant layer thickness within the assembly as a whole, and subsequently the layer is machined in such a way as to produce a running surface that has a region of maximum layer thickness and at least one region of minimum layer thickness. | 12-20-2012 |
