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WO/2012/152240A1 |
The invention relates to a piston ring system for a piston (1) of a two-stroke internal combustion engine, said piston ring system having an internal diameter > 400 mm. The piston ring system has a convex sliding surface, a vertex (15, 1...
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WO/2012/147599A1 |
The present invention is related to a wear ring, the wear ring (20) being attached to the outer peripheral side of a piston (16) in a fluid pressure cylinder (10). An inner peripheral surface (58b) of an annular body (58) protrudes radia...
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WO/2012/144024A1 |
Provided is a seal structure with which the leakage of oil from an oil supply part can be suppressed, and deterioration of the oil due to a rise in the oil temperature can be suppressed. This seal structure provides a seal between two me...
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WO/2012/133714A1 |
In order to provide a multi-piece oil ring that prevents deposition and buildup of oil sludge, and that affords sustained outstanding oil control functionality without seizing up of the constituent components, even when an engine is run ...
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WO/2012/130839A1 |
In a process for producing a piston for an internal combustion engine, a groove is worked into a cast piston blank proceeding from a combustion chamber cavity (20) in a largely radial direction and then closed to form a cooling duct. A c...
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WO/2012/126446A1 |
A method for producing a chambered steel piston ring (1) which is provided with a wear-resistant layer (8, 9), in which a main body (1) is produced which is provided with a chamber (2) formation on the running surface side, which main bo...
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WO/2012/122693A1 |
Disclosed is a piston ring with a diamond-like gradient coating. A basic coating (2) is formed on a base material (3) of the piston ring, and a diamond-like coating (1) with the thickness of 1-5 μm is combined on the basic coating (2), ...
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WO/2012/117987A1 |
Provided is a piston ring capable of reducing its own wear by reducing the load applied to the piston ring. The piston ring (21) is provided with a protruding portion (23) formed on one end, and a recessed portion (24) formed on the othe...
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WO/2012/118036A1 |
In order to provide a second pressure ring for an internal combustion engine so that the ring has superior wear resistance and can be formed at low cost, the second pressure ring for an internal combustion engine is configured having a p...
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WO/2012/113417A1 |
The present invention relates to a piston-piston ring system (30) for a combustion engine with a piston (10) received in a cylinder, said piston (10) comprising a piston base (13) and a piston skirt (22) and having at least one periphera...
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WO/2012/113946A1 |
The invention relates to an oxygen compressor including two compression stages formed by respective cylinders (1 and 2), by means of which a progressive compression of a supply (6) of oxygen to be compressed is carried out, wherein respe...
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WO/2012/113349A1 |
A hydraulic actuator comprises a metal helical coiled multilayer seal (8, 12) for sealing between two relatively moving parts. The hydraulic actuator may include a hydraulic cylinder assembly in which the metal helical coiled multilayer ...
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WO/2012/113350A1 |
Pistons and piston rods of hydraulic cylinders are fitted with coiled felt seal (CFS) in place of rubber O-rings for the sealing of the cylinders. The resulting piston-cylinder mechanical device has a simpler structure, lesser number of ...
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WO/2012/112297A1 |
An assembly ( 100 ) is disclosed for sealing the sliding interface ( 101 ) between two objects capable ( 102, 104 ) of sliding or moving with respect to one another, but where the sliding interface must provide a substantial seal against...
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WO/2012/111826A1 |
[Problem] To provide a piston ring that is capable of maintaining an excellent aluminum adhesion prevention effect over a long period in a high-output engine. [Solution] The upper and/or lower surface of a piston ring is covered with a s...
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WO/2012/107012A1 |
The invention relates to a piston ring, in particular a compression piston ring, having a main body, which comprises a radially outer running surface, a radially inner circumferential surface, an upper and a lower flank surface and a joi...
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WO/2012/105538A1 |
Provided is a combined piston ring having an excellent gas seal characteristic and comprising a special gap effective for countermeasures against blow-by, wherein a combustion chamber-side side surface is not locally deformed nor melted ...
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WO/2012/100847A1 |
A sliding element, in particular a piston ring, has, on at least one running surface from the inside outwards, a coating with a metal-containing bonding layer and a DLC layer of the type ta-C with a thickness of at least 10 μm. In a pro...
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WO/2012/098266A1 |
The oil control ring (1) comprises a retaining ring (2) and a scraper (3) having a scraper fin (3a), wherein the scraper (3) is arranged in the retaining ring (2) in such a way that the scraper fin (3a) is oriented towards the center (1a...
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WO/2012/098267A1 |
The oil control ring (2) extends in a circumferential direction (2x) about a center (2l) and has a longitudinal axis (2m) that passes through the center (2l), wherein the oil control ring (2) has an end face (2d) that faces the center (2...
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WO/2012/091047A1 |
[Problem] To provide a piston ring product in which hard particles can be uniformly filled into cracks occurring on a hard chromium plate that is applied on a sliding surface and which has excellent long-term stability. [Solution] Provid...
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WO/2012/083930A1 |
The invention relates to a method for producing a piston ring (30, 130, 230) for a piston (10) of an internal combustion engine, comprising a ring back (31), an upper ring flank (32), a lower ring flank (33), and a running surface (42), ...
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WO/2012/085870A1 |
Method for obtaining sealing rings (1) such as piston rings and engine oil scraper rings: a first annular cylindrical semi-finished product (2) obtained by centrifugal casting of cast iron is cut in half or into several parts, perpendicu...
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WO/2012/085871A1 |
A method wherein is formed by means of centrifugal casting of an either spheroid or lamellar cast iron in a forming chill-mold (1) a first annular, cylinder-shaped semi-finished product (20) by operating under controlled peripheral chill...
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WO/2012/085145A1 |
The invention relates to a device including a piston (1) which slides inside a hollow cylinder (2), said piston being provided with a guide strip (3) on at least one of the surfaces thereof that contacts the inner surface (4) of the cyli...
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WO/2012/072483A1 |
The invention relates to a sliding element, such as a piston ring, comprising a coating on at least one surface comprising, from inside to outside, a bonding layer (10), a metal DLC layer (12) preferably containing tungsten, and a metal-...
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WO/2012/073717A1 |
Provided are sliding structural members capable of achieving good low friction properties. The sliding structural members are a combination such that a DLC film (2) containing hydrogen is disposed on one member (11) from members that sli...
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WO/2012/067735A1 |
A sliding element 20, such as a bushing or bearing, includes a sintered powder metal base 24 deposited on a steel backing 22. The base 24 includes a tin, bismuth, first hard particles 40, such as Fe3P and MoSi2, and a balance of copper. ...
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WO/2012/067084A1 |
The present invention addresses the problem of providing a piston ring which can reduce reciprocating dynamic friction between a piston and the inner wall of a cylinder and can retain the effect of reducing the friction. The piston ring ...
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WO/2012/045293A1 |
The invention relates to a method for producing a piston ring having an axial height < 2 mm, said piston ring having a radial outer running surface provided with at least one web, a radially inner circumferential surface, and upper and l...
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WO/2012/045295A1 |
The invention relates to a method for producing a piston ring (1'). According to said method, a metallic base body (1) comprising at least one radially outer running surface (5), a radially inner peripheral surface (4) and upper and lowe...
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WO/2012/045294A1 |
The invention relates to a method for producing a piston ring (1'). According to the invention, a metallic base body(1) having a radially outer running surface (7), a radially inner peripheral surface (7') and flank surfaces (3' 3'') whi...
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WO/2012/041267A1 |
The invention relates to a method for producing a piston ring (1) provided with a butt joint (5), in that an annular metal main body is provided with at least one hard layer (2') at least in the area of the outer circumferential surface ...
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WO/2012/028661A1 |
The seal arrangement (1) for piston compressors comprises a deformable ring support (2) and a first and a second endless sealing ring (3a, 3b), wherein the ring support (2) has a longitudinal axis (L) which extends perpendicularly with r...
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WO/2012/024779A1 |
A non-rotating piston (10) for slidable and longitudinal displacement within a corresponding channel housing (12) defining a housing axis (28) thereof includes a body (20) having a polygonal section formed with a plurality of rectilinear...
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WO/2012/017590A1 |
This reciprocating engine (1) is such that high-temperature high-pressure combustion gas (12) above a piston (2) is introduced during the initial period of an expansion step from a gas path hole (23) provided at the upper portion (22) on...
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WO/2011/151927A1 |
Disclosed is a high-quality oil ring for internal combustion engines which serves to reduce oil consumption over an extended time period with stability and enables the shape of an upper rail and a lower rail to be formed at low costs wit...
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WO/2011/151069A1 |
This invention refers to an oil control ring (1) idealized for internal combustion engines, formed by a ferrous body that includes two external contact surfaces (102) where each surface (102) contains a first (22) and second (23) extremi...
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WO/2011/152114A1 |
Disclosed is a high-quality oil ring for an internal combustion engine, with which oil consumption can be stably reduced over an extended period of time, and upper and lower rails can be shaped with low costs and a high degree of precisi...
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WO/2011/148934A1 |
Provided is a pressure ring which is capable of being used in environments in which there is a high thermal load of an engine having a high compression ratio, which has excellent heat conductivity and heat setting resistance, and which i...
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WO/2011/137747A1 |
An inner-and-outer tooth typed piston ring for sealing gas and a piston having the piston ring are disclosed. The piston ring includes a solid ring (2) with a cut. The solid ring (2) has an upper annular surface and a lower annular surfa...
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WO/2011/132679A1 |
In order to provide an oil ring that is for an internal combustion engine, stably obtains over the long term the ability to scrape away excess oil from the inner walls of cylinders, allowing the oil to flow down the rear surface of pisto...
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WO/2011/124405A1 |
In an annular seal element (36), in particular for a hydraulic piston pump (10), for sealing off a pressurized region (24) filled with a fluid, one end face (44) is pressed onto a contact surface (50) of a piston (14), and the end face (...
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WO/2011/110411A2 |
In a method for coating at least part of the inner face of a piston ring, said ring preferably consisting of cast iron or steel, a PVD and/or DLC coating is applied by means of at least one of the following methods: PA-CVD, glow discharg...
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WO/2011/110412A1 |
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 (16) and a-C: H: Me coatings (14) alternately. In a ...
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WO/2011/110413A1 |
A sliding element, in particular a piston ring, preferably made of cast iron or steel, has a coating which has a plurality of layers of CrN (14) and a-C:H:Me coatings (16) alternately. In a method for coating the sliding element, in part...
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WO/2011/103853A1 |
A method for producing piston rings, in particular compression piston rings, in which at least one main element (1) is machined in such a way that a circumferential surface (2, 2') serving as a running surface is provided with a wear-res...
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WO/2011/099402A1 |
A piston of a fluid pressure cylinder is provided with a seal ring which is fitted into a seal ring holding groove; piston rings each of which has a cut-off section, and which are fitted into piston ring holding grooves in a piston; and ...
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WO/2011/094906A1 |
A end-unsymmetrical complementary close-type abrasion-resistant piston ring (1), including a concave semi-step (2), a concave semi-step upper side wall (3), an upper closure side wall (4), and a lower closure side wall (5) which are on t...
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WO/2011/093106A1 |
The provided reciprocating engine (1) has a gas chamber (4) bounded by the inside surface (8) of a cylinder and a top ring (5), second ring (6), and second land (7) of a piston (2). At the beginning of a power stroke, a high-pressure com...
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