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WO/2024/069774A1 |
This piston ring is used in an internal combustion engine that uses a hydrogen gas fuel. The piston ring satisfies 0.75 ≤ FPS, when: the flexural index of the piston ring found when same is subjected to a flexural test under a prescrib...
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WO/2024/063157A1 |
[Problem] To provide: a novel sliding member which exhibits chipping resistance and wear resistance, has excellent peel resistance, can achieve the reduction in friction, is particularly less likely to undergo chipping or cracking, and c...
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WO/2024/048188A1 |
Provided is a multiple-piece type oil ring that is to be installed on the piston of an internal combustion engine, and that comprises a ring body with a rail and an expander. The rail of the ring body has a film formed by a physical vapo...
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WO/2024/038140A1 |
The invention relates to an elliptical ring groove piston, wherein the piston comprises a piston head and a skirt portion, an inner cooling gallery for cooling the piston is provided inside the piston head, and the inner cooling gallery ...
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WO/2023/239333A1 |
The present invention relates to a ring configuration (1) for realizing the sliding motion and the sealing in a vertical direction while a ram table (T), particularly rectangular-shaped, moves within a rectangular housing.
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WO/2023/188834A1 |
This piston unit, which reciprocates in a cylinder, comprises a piston and a top land member mounted to the piston. The piston has a first portion that includes an end part of a side of one end face of the piston and on which the top lan...
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WO/2023/181980A1 |
[Problem] To reduce the amount of wear of a lip ring having PTFE as a main component. [Solution] A sliding mechanism for a rocking piston type oil-free reciprocating compressor comprises a cylinder, and a lip ring. The cylinder has a met...
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WO/2023/173188A1 |
The present invention refers to a two-stroke internal combustion engine, a lubrication device (130) and a two-stroke combustion engine cylinder (100) comprising the lubrication device (130). In the engine, the lubrication device (130) de...
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WO/2023/167407A1 |
The present invention relates to a piston ring for a compression apparatus, wherein both sides of a cut portion are formed to be fitted with each other so that oil leaks through the cut portion can be prevented and the compression ratio ...
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WO/2023/162370A1 |
The outer peripheral surface of this piston ring has a cut surface that forms a cutout between the outer peripheral end and the lower surface. The cut surface includes a first surface provided between the outer peripheral end surface and...
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WO/2023/162369A1 |
The outer peripheral surface of this piston ring has a cut surface that is provided so as to form a cutout between the outer peripheral end and the lower surface. The cut surface includes a curved concave surface. The angle of inclinatio...
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WO/2023/157914A1 |
Provided is a sealing resin composition and a seal which can be used, in particular, with a high-temperature and high-pressure gas, especially hydrogen gas. The sealing resin composition is used in a piston ring 1 that is for sealing a g...
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WO/2023/152265A1 |
The invention relates to a piston (1) for a compressor, comprising: a piston rod (2) which defines a longitudinal axis (L); and a piston ring pack (11) having a support sleeve that extends along the longitudinal axis (9) and that is arra...
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WO/2023/128899A1 |
The invention relates to the seal ring (31), which is located in the double-acting telescopic cylinder consisting of a plurality of nested rods (10) and sealing elements between the piston (20) moving in the rod (10) and the rod (10), th...
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WO/2023/127607A1 |
This piston ring is provided with an annular body having: an inner circumferential surface and an outer circumferential surface; and one lateral surface and the other lateral surface that are substantially orthogonal to the inner circumf...
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WO/2023/113035A1 |
[Problem] The present invention addresses the problem of providing: a thermal spray coating film which exhibits excellent wear resistance, scuff resistance and initial conformability, while having low counterpart attacking properties; an...
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WO/2023/079784A1 |
Provided is a piston ring (20) comprising a low-pressure-side ring (21) having a low-pressure-side abutment (21a) and a high-pressure-side ring (22) having a high-pressure-side abutment (22a), the low-pressure-side junction (21a) and the...
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WO/2023/053379A1 |
The present invention addresses the problem of providing a sliding member that is covered by a DLC coating, is less likely to have micro-fractures on the sliding surface that have been caused by the progression of cracks, and is able to ...
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WO/2023/053607A1 |
A piston ring combination for mounting to a piston in an internal combustion engine is provided which comprises four compression rings. An outer peripheral surface of a first compression ring includes a barrel face, an outer peripheral s...
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WO/2023/053380A1 |
The present invention addresses the problem of providing a sliding member covered with a DLC coating with which microfractures in a sliding surface due to development of cracks are less likely to occur, and an increase in abrasive wear c...
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WO/2023/052215A1 |
The invention relates to a coating for reducing the high-temperature oxidation of a piston for an internal combustion engine. This coating is obtained by means of a titanate-containing or zirconate-containing composition, at least one me...
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WO/2023/052452A1 |
The invention relates to a piston ring for internal combustion engines, having a surface, comprising a wear protection layer made of iron or iron alloy applied onto the surface, wherein the wear protection layer has cracks, said cracks h...
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WO/2023/048559A1 |
The present invention relates to an internal combustion engine, comprising a cylinder defining a combustion chamber enclosed by a cylinder wall, a piston that is arranged inside the combustion chamber and moveable in a reciprocating moti...
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WO/2023/041205A1 |
The invention relates to a compression ring comprising a ring running surface (2) on a first butt end region, a ring running surface (2') on a second butt end region, a ring inner surface (4), a top ring flank surface (6) and a bottom ri...
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WO/2023/042852A1 |
This composite seal material (1) for a compressor includes a first annular seal group (1a) and a second annular seal group (1b) mounted in an annular groove of a piston (10). The first annular seal group (1a) comprises: a first annular s...
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WO/2023/017833A1 |
Provided is a low-cost piston ring which has a low sulfur atom content, does not require a particular exposure device and does not require strict safety measures. A piston ring 1 which is to be used in a reciprocating compressor for comp...
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WO/2023/013264A1 |
An oil ring according to the present invention includes: a pair of segments that are formed following a perimeter direction of the oil ring and that are provided arrayed in the axial direction of the oil ring, independent from each other...
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WO/2023/013265A1 |
This oil ring comprises a pair of segments that are annularly formed so as to follow the circumferential direction of the oil ring and that are arranged independently of each other in the axial direction of the oil ring, and a spacer exp...
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WO/2023/007734A1 |
The combination of piston rings assembled to a piston comprises a first compression ring, a second compression ring, a third compression ring, and an oil ring. When the first compression ring has an axial width of h1(1), the second compr...
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WO/2023/007735A1 |
This combination of piston rings assembled on pistons includes a 1st compression ring, a 2nd compression ring, a 3rd compression ring, and an oil ring. Letting h1(1) be the axial width of the first compression ring, h1(2) be the axial wi...
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WO/2023/009746A1 |
Systems and methods are provided for a sealing element arranged in a ring groove of a piston assembly to seal against the ring groove at a first interface and to seal against a bore of a cylinder, in which the piston assembly is arranged...
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WO/2023/002834A1 |
Provided is a heat insulating film which, despite being provided with an inorganic compound layer, overcomes various problems that arise due to the occurrence of voids or microcracks in the inorganic compound layer. A heat insulating fil...
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WO/2022/240951A1 |
A coated piston ring (20) for a piston (22) is provided. The piston ring includes a running surface (38), a flank surface (30), and a transition surface (40) therebetween. The transition surface curves or extends at an angle between the ...
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WO/2022/233481A1 |
Disclosed is a piston ring (2), comprising a ring outer side (4), a ring upper flank (6) and a ring lower flank (8), the ring outer side (4) having, at an upper edge (10), a pressure relief chamfer (12) so that only a lower part of the r...
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WO/2022/219831A1 |
This space expander comprises: an expander body that is annularly formed along the circumferential direction of an oil ring and that urges a pair of segments outward in the radial direction of the oil ring, the expander body including a ...
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WO/2022/209592A1 |
This side rail constitutes an oil control ring together with a space expander, the side rail including an outer peripheral surface, an inner peripheral surface having a vertically symmetrical shape in a cross section in an axial directio...
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WO/2022/210299A1 |
According to the present invention, a piston and piston ring combination structure comprises a ring groove that is provided in an outer circumferential surface of a piston and is for installing a piston ring, one or more piston rings tha...
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WO/2022/211784A1 |
Disclosed is a flange shield for separating flanges including a polymeric fabric having a disk shape and sandwiched between the flanges and apertures inwardly spaced a distance from a circumferential edge of the polymeric fabric and able...
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WO/2022/209007A1 |
The present invention provides a sliding member having excellent wear resistance. The sliding member 12, which contacts a sliding surface 13, includes: a first member 12a configured from a first material, which contains a first matrix re...
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WO/2022/209621A1 |
This oil control ring comprises: an oil ring in which a pair of land sections disposed along the sliding direction are coupled by a web section; and a coil expander that forces the oil ring radially toward the outer periphery. In the web...
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WO/2022/209023A1 |
A piston ring manufacturing method according to the present disclosure includes the following steps. (A) A step in which an arc current is supplied to a cathode configured from a carbon material having a density of at least 1.70 g/cm3, t...
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WO/2022/200465A1 |
The present invention relates to an oil control ring which is designed for internal combustion engines and which, thanks to its structural configuration, allows a better distribution of the contact pressure and scraping of the oil and a ...
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WO/2022/186258A1 |
Provided is a piston ring which has excellent wear resistance and is reduced in the wear damage of a cylinder. The piston ring 1 can be used in a reciprocating compressor for compressing a gas and comprises a resin composition containing...
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WO/2022/176113A1 |
The present invention addresses the problem of providing a sliding coating film which is capable of suppressing separation phenomenon that is different from detrition due to sliding. The problem is solved by a sliding coating film which ...
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WO/2022/168668A1 |
An outer peripheral surface of this compression ring includes a barrel curved surface, wherein: if L1 is a width of the outer peripheral surface in an axial direction of the compression ring, the condition 0.2 mm<1/2×L1 is satisfied; an...
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WO/2022/160964A1 |
A combined type piston ring of a crushing hammer, comprising a piston ring body (1). O-shaped seal rings (2) are sleeved at two ends of the piston ring body (1); a copper ring holder (3) is provided on an end face of the piston ring body...
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WO/2022/150576A1 |
The present disclosure relates to piston assembly comprising a piston having a circumferential groove and a ring groove insert within the circumferential groove of the piston. Particularly, the ring groove insert is a second material dif...
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WO/2022/136014A1 |
A compressor (10) having a stationary part (20), a part (30) oscillating along a main axis (X), and a leakage path (L) extending between the stationary part (20) and the oscillating part (30) in the axial direction, wherein a plurality o...
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WO/2022/137631A1 |
The present invention addresses the problem of providing a CrN coating film which has excellent peeling resistance and is not susceptible to separation of the coating film, said separation beginning at a crack, even in a severer lubricat...
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WO/2022/131057A1 |
This film comprises Cr, Ti, Si, and N, wherein the Ti is contained in an amount of 0 at% to 25 at% (exclusive of 0 at%), and the film has a NaCl-type crystal structure. This piston ring comprises: a substrate; and said film provided to c...
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