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WO/2019/032894A1 |
A ringset (220, 230) is configured to be arranged on a piston (226) for sealing a gas in a high-pressure region of a cylinder (260) in the absence of oil or other liquid lubricant. The ringset includes one or more rings made from a high-...
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WO/2019/032904A1 |
A sealing ring (200) includes a first sealing element (220) having a first mating surface and a second sealing element (230) having a second mating surface. A high-pressure boundary (250) extends across at least a portion of the first se...
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WO/2019/032922A1 |
The present disclosure provides a sealing ring assembly having a ring and one or more gap cover elements, configured to seal a high-pressure region from a lower pressure region of a piston and cylinder device. The ring may be segmented, ...
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WO/2019/032919A1 |
The present disclosure provides a sealing ring assembly (402) with one or more piston-integrated gap cover features, configured to seal a high-pressure region from a relatively lower pressure region of a piston (410) and cylinder device....
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WO/2019/032867A1 |
A sealing ring segment (200) of a sealing ring assembly may include three layers (201, 202, 203). The middle layer (202) is permeable to gas, thus allowing radial pressure-balancing on the sealing ring segment to reduce wear. The gas-per...
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WO/2019/026335A1 |
In a reciprocating compressor in which a rocking piston mechanism is adopted, a lip ring is disposed between an outermost peripheral portion of a rocking piston and a cylinder, or the lip ring is disposed in an outer peripheral portion o...
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WO/2019/020143A1 |
Method for producing a piston ring consisting of steel or cast steel, by providing a main body comprising a running surface, an inner circumferential surface, upper and lower flank regions and transitional regions from the running surfac...
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WO/2019/015818A1 |
The present invention relates to a piston ring, having an annular body (2), a wear protection layer (6) applied onto the annular body (2) by thermal spraying; and a cold-solidified running-in layer (8) applied onto the wear protection la...
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WO/2019/008780A1 |
Provided is a combined oil ring with which friction occurring during oil ring sliding, as well as the amount of oil consumed during same, can be reduced. The shape of the outer circumferential surface of an upper segment (among a pair of...
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WO/2019/007455A1 |
The invention relates to a multipart oil scraper piston ring containing a slotted spring element and at least one lamella element which is operatively connected to the spring element and is provided with an abutting region. The abutting ...
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WO/2018/234244A1 |
The invention relates to a piston ring composed of a fibre composite material with fibres and a matrix, wherein the matrix comprises carbide and a free carbon phase with a fraction of at least approximately 5 % by volume. The invention a...
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WO/2018/235750A1 |
[Problem] To provide: a sliding member having a coating film exhibiting constant and stable chipping resistance and wear resistance and having excellent peel resistance (adhesiveness); and the coating film. [Solution] The problem is addr...
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WO/2018/233753A1 |
The invention relates to an oil control ring, containing a running surface region, formed by at least two running surface webs, an inner circumferential surface and upper and lower flank surfaces extending between the running surface reg...
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WO/2018/220192A1 |
A piston ring and a method of manufacturing a piston ring for a piston of a reciprocating internal combustion engine. The piston ring comprises a body having an outer circumferential surface. A tribological coating is formed on the outer...
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WO/2018/215269A1 |
A piston ring is formed from a steel substrate consisting of the carbon in a range of 0.80-0.95wt.%, silicon in a range of 0.30-0.55 wt.%, manganese in a range of 0.25-0. wt.%, phosphorus in a range of up to 0.04 wt.%, sulfur in a range ...
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WO/2018/198173A1 |
This side rail (1) is configured to have: an outer peripheral surface (14) facing radially outward; an inner peripheral surface (13) facing radially inward; a first axial side surface (11) facing one axial side; and a second axial side s...
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WO/2018/197450A1 |
The present invention relates to an oil scraper ring spring (1) for an oil scraper ring (3), which has the oil scraper ring spring (1), an upper and a lower metal ring (21, 22) and which is provided for being installed in an oil ring gro...
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WO/2018/189255A1 |
The present invention relates to a piston ring (1) for internal combustion engines provided with a ferrous alloy base (2) that comprises an annular outer surface (3) on which a coating comprising at least one outer layer (6) is applied d...
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WO/2018/187006A1 |
A split-ring annular seal or retaining ring having overlapping tapered projections at juxtaposed ends. The tapered projection of each juxtaposed end has an enlarged portion forming a tapered ridge that tapers toward a narrow portion form...
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WO/2018/177900A1 |
A piston ring that is pre-treated by grit blasting to a defined roughness, followed by PVD coating with a metal nitride to a thickness of at least 10µm, leaving peaks and valleys in the coated piston ring. The coated piston ring is then...
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WO/2018/179709A1 |
The present disclosure pertains to a slide member. This slide member comprises a base material and an amorphous hard carbon film formed on the surface of the base material, wherein the amorphous hard carbon film has an sp2 ratio that inc...
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WO/2018/181383A1 |
This piston for an internal combustion engine is provided with a piston main body and a piston ring arranged in a ring groove and can move inside of the cylinder, wherein, with piston ring in a free state, the upper surface of the piston...
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WO/2018/179708A1 |
The present disclosure relates to a sliding member. This sliding member includes a base material and an amorphous hard carbon film formed on a surface of the base material, the amorphous hard carbon film having a graded composition where...
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WO/2018/183895A1 |
A piston and cylinder arrangement is disclosed in which a field of spaced pockets is provided on the walls of a piston skirt and/or the cylinder to create a seal equivalent between the piston and the cylinder. The pockets may be provided...
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WO/2018/177574A1 |
The invention relates to a play-free oil scraper ring, the cross section of which comprises: a running surface limb having at least one scraper web which is arranged on a running surface, an upper piston ring flank limb which is connecte...
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WO/2018/172091A1 |
The invention relates to a piston ring, in particular a compression piston ring, comprising, on a top piston ring flank, at least one recess having a bottom edge extending obliquely with respect to the top piston ring flank, which recess...
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WO/2018/173995A1 |
In order to provide a composite chrome plating film having excellent wear resistance and little aggression toward a mating material (sliding member), and a piston ring having the film, the present invention is configured so that hard par...
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WO/2018/173423A1 |
This piston ring (1) consisting of a resin has: an annular body (2) having an inner peripheral surface (2c) and an outer peripheral surface (2d), which face each other, and also having a pair of side surfaces 2a, 2b) for connecting the i...
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WO/2018/157880A1 |
The invention relates to a piston ring, in particular a compression piston ring, containing a running surface, upper and lower face regions, an inner peripheral surface, and a joint, at least the running surface being provided with at le...
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WO/2018/153923A1 |
The invention relates to a guide element, which is simply constructed and permits efficient guidance of a piston in the piston receptacle, for example a cylinder. According to the invention, the guide element comprises the following: an ...
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WO/2018/154213A1 |
The invention relates to an articulated coupling (1) provided for a piston sealing device (2) for a piston (3) that includes a stationary skirt (7) and a sliding skirt (12) connected to one another by a mechanical link between skirts (13...
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WO/2018/155380A1 |
This piston is provided with an annular piston band (7). The piston band (7) has an annular protrusion (8) formed at one axial end of the piston band (7) and having a larger outer diameter than the remaining portion of the piston band (7...
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WO/2018/149444A1 |
The invention relates to a cylinder (10) of an internal combustion engine, comprising a cylinder liner (11) and a cylinder piston (12) which is guided in the cylinder liner (11). The cylinder piston (12) has multiple ring grooves (18) wh...
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WO/2018/147122A1 |
Provided is a coating device that can control film thickness distribution in the circumferential direction of a workpiece. The coating device is provided with: a workpiece rotating device (5) for rotating and revolving a plurality of wor...
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WO/2018/138574A1 |
The present disclosure relates generally to seal rings useful in rotating systems such as automobile transmissions, torque converters and automatic clutches. In one embodiment, the disclosure provides a seal ring in which the first end i...
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WO/2018/130316A1 |
The invention relates to a piston ring, having a ring body (14) of gray cast iron, which has a region of ledeburite microstructure (4) on at least one ring flank (8), which region of ledeburite microstructure extends to the ring running-...
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WO/2018/130779A1 |
The present invention concerns a combustion engine piston (1), comprising: a skirt (2) for guiding the piston (1) in translation along a central axis (X1) in a counter-part (C) and consisting of a first contact area (Z2) of the piston (1...
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WO/2018/128774A1 |
A piston ring is made from a copper-nickel-silicon-chromium alloy. This material permits the top compression ring of a piston to be moved closer to the piston crown, reducing crevice volume and reducing the tendency for pre-ignition. Ign...
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WO/2018/128775A1 |
A piston ring is made from a copper-containing alloy. This material permits the top compression ring of a piston to be moved closer to the piston crown, reducing crevice volume and reducing the tendency for pre-ignition. Ignition timing ...
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WO/2018/128773A1 |
A piston ring is made from a copper-beryllium alloy. This material permits the top compression ring of a piston to be moved closer to the piston crown, reducing crevice volume and reducing the tendency for pre-ignition. Ignition timing a...
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WO/2018/127534A1 |
The present invention relates to a stepped piston ring (2), comprising a ring outer side (5), an upper ring flank (6), a lower ring flank (8), wherein the ring outer side (5) has a recess (10) on an upper edge, so that only a lower part ...
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WO/2018/114224A1 |
The present invention relates to a Piston (1) for an internal combustion engine (2) having - a piston axis (3) and a radial plane (4) which runs orthogonally with respect thereto, - a piston head (6) with an outer circumferential face (5...
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WO/2018/108464A1 |
The piston ring comprises an endless base ring (5) and a sealing ring (3) wherein the base ring (5) has a radially outwardly directed base ring face side (5a), and wherein the sealing ring (3) has a radially outwardly directed sealing fa...
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WO/2018/103779A1 |
The invention relates to an oil control ring (1) for an internal combustion engine, having two webs (3, 4) arranged axially one over the other in the region of the running surface (5, 6) of the oil control ring, wherein both webs form th...
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WO/2018/074939A1 |
Sealing of the moving cylindrical surfaces of, in particular, pumped storage installation, characterized in that between the wall of the cylindrical tank (1) and the piston (2) wall there is a toroid shaped gasket (3) made of flexible ma...
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WO/2018/073033A1 |
The invention relates to a sealing element and/or guide ring produced from a composition that contains: i) 50 to 98 wt% of polytetrafluoroethylene and/or modified PTFE, ii) 1 to 49 wt% of perfluoroalkoxy polymer and iii) 1 to 49 wt% of a...
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WO/2018/071867A1 |
The present disclosure provides an open-faced piston with a circumferential groove into which a piston ring assembly is arranged. Openings at the bottom of the circumferential groove and between a front land of the open-faced piston and ...
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WO/2018/065535A1 |
The present invention relates to a one piece oil control ring (10) for an internal combustion engine capable of readily conforming to a cylinder liner (20) by virtue of the excellent flexibility of the ring (10), comprising a first surfa...
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WO/2018/056282A1 |
Provided is a sliding component having excellent sliding properties. Also provided are a sliding structure provided with this sliding component and a method for sliding the sliding structure. The sliding component has a constituent compo...
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WO/2018/053428A1 |
A piston ring having a ring-shaped body with at least one internal wall surface configured to bear against the piston, an exterior wall surface, and at least a top wall surface extending from the exterior wall surface to the at least one...
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