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JP7260462B2 |
To provide an engine that hardly causes a liquid sagging phenomenon from an exhaust passage.A piston head PH comprises: a top ring groove 1RG in which a top ring 1R is fit; a second ring groove 2RG in which a second ring 2R is fit; an oi...
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JP2023515290A |
An oil scraper piston ring (1) consisting of a plurality of components comprising a slitted spring member and at least one disk member (3, 3) operatively connected to the spring member and provided with an opening (7). 4), the spring mem...
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JP2023051293A |
To provide a technology which can improve oil seal performance, in a combined oil ring having a pair of segments and a spacer expander.A three-piece type combined oil ring comprises a pair of segments and a spacer expander. In a first in...
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JP2023051683A |
To provide a sliding member that is hard to generate micro destruction on a sliding surface due to crack development, can suppress increase in abrasive wear, and is covered with a DLC coating film.A sliding member has a DLC coating film ...
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JP7254836B2 |
Provided is a combined oil ring that can provide reduction in oil consumption of the engine oil without degrading the oil sealing performance between the lower surface of the side rail and the lower surface of the oil ring groove even wh...
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JP2023049550A |
To provide a technology in which an oil ring comprising an axially corrugated spacer expander is capable of preventing abutment end parts of the spacer expander from overlapping with each other and suppressing rotation of the oil ring wi...
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JP2023513972A |
The present invention relates to a sliding element, in particular a piston ring, and a method for its manufacture, comprising a base material of martensitic or austenitic stainless steel with a chromium content of at least 6.0% by weight...
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JP7250714B2 |
A piston ring according to this disclosure comprises a substrate and a coating film that is provided to cover at least a portion of the substrate surface and that contains elemental metals, Si, and N. The elemental metals include at leas...
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JP2023043980A |
To provide a composite seal material for a compressor enabling space saving and elongation of a service life.A composite seal material 1 for a compressor includes: a first annular seal group 1a fitted to an annular groove of a piston 10;...
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JP7246504B2 |
This shock absorber includes a piston main body and a piston band. The piston main body has, at an outer peripheral portion thereof, a stepped portion including a large-diameter surface portion, a stepped surface portion and a small-diam...
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JP2023039250A |
To provide: a piston including a wear resistant ring capable of reducing a weight while keeping strength against wear of the wear resistant ring; and an internal combustion engine using the piston.A piston includes: a piston main body po...
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JP2023029947A |
To provide compression rings with high thermal conductivity, good wear resistance and thermal stability.A piston ring is made of a copper-nickel-silicon-chromium alloy. This material permits a top compression ring of a piston to be moved...
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JP2023028623A |
To provide a piston ring and a method of manufacturing the same having a low content of sulfur atoms, not requiring a special exposure device, not requiring strict safety measures, and inexpensive.A piston ring 1 used in a reciprocating ...
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JP7231330B2 |
To provide an engine component of which the heat insulation layer has high heat insulation property and good adhesion property to a base material.The engine component includes the metal base material, and the heat insulation layer provid...
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JP7230153B1 |
An object of the present invention is to prevent stress from concentrating on a partial region of a high-pressure side ring, resulting in fatigue fracture. A low pressure side ring (21) having a low pressure side abutment (21a) and a hig...
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JP2023025841A |
To provide a piston ring which has a low content of sulfur atoms, does not require a special exposure device, does not require strict safety measures, and is inexpensive.A piston ring 1 used in a reciprocating type compressor for compres...
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JP2023025840A |
To provide a piston ring which has a low content of sulfur atoms, does not require a special exposure device, does not require strict safety measures, and is inexpensive.A piston ring 1 used in a hydrogen gas reciprocating type compresso...
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JP2023507320A |
A set of piston rings for a cryogenic pump, a first piston ring and a second piston that are differently shaped and cooperatively shaped to form a hollow cylindrical shape when in abutment with each other Including ring. The first piston...
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JP7224404B1 |
A technique for easily identifying each of a pair of segments in an oil ring having a pair of segments is provided. The oil ring is formed in an annular shape along the circumferential direction of the oil ring, and is arranged between a...
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JP7220961B2 |
To accurately assemble a piston ring to an annular piston ring groove.A feeding force in an axial direction is applied to a plurality of piston rings R held in a diameter enlarged state coaxially with an outer periphery of a cylindrical ...
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JP2023019120A |
To extend a life of a piston ring by keeping a state that difference of differential pressure between piston rings is eased even if time has passed, in a piston equipped with the plurality of piston rings.In a piston 20, a clearance betw...
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JP2023019119A |
To extend a life of a piston ring by keeping a state that difference of differential pressure between piston rings is eased even if time has passed, in a piston equipped with the plurality of piston rings.A piston 20 is equipped with a p...
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JP7219776B2 |
To provide a piston ring for an internal combustion engine, particularly a second compression ring, which has excellent wear resistance and can achieve both lower fuel consumption and efficient combustion. The above-described problem is ...
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JP7219537B2 |
To provide a piston ring set that can sufficiently suppress oil consumption and sufficiently maintain sealing performance for a long term.A piston ring set includes a plurality of piston rings fitted to a piston for an internal combustio...
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JP2023016540A |
To provide 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 film ...
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JP2023014184A |
To provide sealing ring assemblies configured for pressure locking.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-pressu...
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JP7213231B2 |
The present disclosure provides a sealing ring assembly having a sealing ring and a reinforcement, configured to seal a high-pressure region from a lower pressure region of a piston and cylinder device. The sealing ring may be segmented,...
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JP7211747B2 |
To provide an inclined shaft type liquid pressure rotary machine capable of accurately forming a separating portion of a piston ring.A piston ring installation groove 12C of a piston 12 is installed with a piston ring 15. The piston ring...
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JP7209240B2 |
A sliding mechanism of the present invention includes a cylinder bore having a thermally sprayed iron-based coating and includes a piston with a piston ring covered with a hard coating composed mainly of carbon.The thermally sprayed coat...
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JP2022191665A |
To provide a piston ring capable of reliably avoiding or suppressing the formation of a gas passage caused by an abutment part.A piston ring opened at the abutment part into an annular shape, and arranged in a ring groove formed in the o...
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JP2022187021A |
To provide an oil ring for an internal combustion engine which enables reduction of swell occurring during manufacturing of the oil ring while securing oil consumption reduction effect to improve oil seal performance.An oil ring 1 for an...
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JP7186765B2 |
A sealing ring includes a first sealing element having a first mating surface and a second sealing element having a second mating surface. A high-pressure boundary extends across at least a portion of the first sealing element and across...
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JP7182097B2 |
Provided is an internal combustion engine oil ring with which it is possible to reduce undulations generated during manufacture of the oil ring, and to improve the oil sealing performance, while maintaining an effect of reducing oil cons...
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JP2022548893A |
The invention thus relates to a substrate (1) with a multilayer coating system (2) in the form of a surface coating, with an outer cover layer (3) comprising amorphous carbon. According to the invention, at least the first MoaN.xA suppor...
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JP7163452B2 |
A piston ring (34,36) for use in a piston ring pack in an annular ring groove (33) in the sidewall of a piston (10) of a large two-stroke turbocharged uniflow-scavenged internal combustion engine with crossheads to seal against the press...
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JP7162128B2 |
A fastener driving tool with a working cylinder and a piston, the piston outer surface having a lubricant-saturated foam material that stores and dispenses lubricant into the piston-cylinder wall interface, thereby increasing the perform...
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JP7159111B2 |
To provide a combination of lubricant and a sliding member such as a piston ring for an internal combustion engine having a coating film excellent in flow friction performance as a sliding surface.This invention is a combination of a sli...
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JP7159286B2 |
A piston ring includes an annular body, a wear-resistant layer that is applied to the annular body by thermal spraying, and a strain-hardened run-in layer, made of an AlCuFe alloy, that is applied to the wear-resistant layer by thermal s...
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JP2022161114A |
To provide an internal combustion engine that can suppress decrease in contact pressure in a slide contact part of a piston ring to a wall surface of a cylinder bore even when the slide contact part wears substantially.An internal combus...
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JP2022155526A |
To provide a technology of a combination structure of a piston and a piston ring, the technology being capable of suppressing troubles due to direct contact between the piston ring and an inner wall of a piston ring groove.A combination ...
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JP2022155445A |
To provide a technology of a combination structure of a piston and a piston ring of an internal combustion engine, the technology being capable of suppressing troubles due to direct contact between the piston ring and an inner wall of a ...
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JP2022152957A |
To provide a sliding member having excellent wear resistance.A sliding member 12 is in contact with a sliding surface 13. The sliding member 12 includes: a first member 12a constituted of a first material including a first base material ...
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JP2022148214A |
To provide a technology capable of easily identifying the vertical direction of a ring-shaped member in the state of a stack part in which the ring-shaped members are stacked in a cylindrical manner, in a stack body of the ring-shaped me...
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JP7148667B1 |
An object of the present invention is to prevent engine oil from staying in a land space on the cylinder side of an oil ring and deposits from accumulating in an oil control ring. An oil control ring (1) includes an oil ring (10) in whic...
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JP2022146454A |
To provide a piston for a diesel engine which can be reduced in weight while suppressing the lowering of wear resistance.A piston for a diesel engine has a top ring groove and a second ring groove at a piston head. The inside of the top ...
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JP2022143860A |
To provide a piston for an internal combustion engine which can improve the heat insulation performance of a top ring groove even if using an aluminum alloy largely containing Cu more than before as a raw material, and can maintain seal ...
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JP2022135873A |
To provide a piston ring excellent in abrasion resistance, which hardly causes abrasion damage to a cylinder.A piston ring 1 used in a reciprocating type compressor for compressing gas is made of resin composition with polyether ether ke...
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JP7132721B2 |
To prolong a replacement life of a rider ring arranged on a crosshead outer periphery of a reciprocating compressor using a crosshead piston.A reciprocating compression crosshead piston using a crosshead piston has a piston part and a cr...
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JP2022125753A |
To provide a piston capable of suppressing rotations of a piston ring while suppressing the expansion of an abutment joint of the piston ring.In a piston, a piston ring having an abutment joint is disposed in a ring groove formed between...
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JP7116861B1 |
A side rail that constitutes an oil control ring together with a spacer expander, and has an outer peripheral surface, an inner peripheral surface having a vertically symmetrical shape in an axial cross section, a first side surface, and...
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