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公开(公告)号：US12078250B2
公开(公告)日：2024-09-03
申请号：US17733228
申请日：2022-04-29
发明人： Matt Svrcek , Jodie Prudhomme
摘要： The present disclosure provides a sealing ring assembly having a first ring and a second ring, configured to seal a high-pressure region from a lower pressure region of a piston and cylinder device. Accordingly, the sealing ring assembly includes a high-pressure boundary and a low-pressure boundary. Each ring may be segmented, and the first and second rings interface along a surface. Along the surface at the interface, a groove open to the lower pressure region aids in pressure locking the sealing ring assembly. A pocket in the second ring allows for high pressure gas to aid in balancing radial forces on the sealing ring assembly. As the sealing ring wears, the first and second rings remain engaged with one another.
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公开(公告)号：US20240159313A1
公开(公告)日：2024-05-16
申请号：US18283948
申请日：2022-03-25
发明人： Hiroyuki SUGIURA , Takahiro OKAZAKI
CPC分类号： F16J9/26 , C23C14/0015 , C23C14/0605 , C23C14/54
摘要： A sliding member including a coating film in a sliding surface on a base material. The coating film includes, when a cross section thereof is observed by a bright-field TEM image, a laminated part configured by laminating, in a thickness direction, repeating units including black hard carbon layers and white hard carbon layers and a surface layer part composed of a white hard carbon layer provided on the laminated part. A Vickers hardness of the black hard carbon layer is within a range of 700 to 1600 HV, a Vickers hardness of the white hard carbon layer is higher than a Vickers hardness of the black hard carbon layer adjacent thereto and within a range of 1200 to 2200 HV, and a Vickers hardness of the surface layer part is lower than the Vickers hardness of the white hard carbon layer and within a range of 800 to 1200 HV.
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公开(公告)号：US20240125386A1
公开(公告)日：2024-04-18
申请号：US18278175
申请日：2022-03-02
申请人： NTN CORPORATION
发明人： Ken YASUDA
摘要： To provide a piston ring having superior wear resistance and causing less wear damage of a cylinder. A piston ring 1 is used in a reciprocating compressor that compresses gas. The piston ring 1 is formed of a resin composition containing polyetheretherketone resin as a main component. The melt viscosity of the polyetheretherketone resin at the shear rate of 1,000/s and the temperature of 400° C. is 200-550 Pa·s based on a measuring method defined in ISO 11443. The resin composition contains 5-25 vol % of carbon fiber and 5-25 vol % of a solid lubricant, relative to the whole of the resin composition. The solid lubricant includes at least one of PTFE resin and graphite.
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公开(公告)号：US11946010B2
公开(公告)日：2024-04-02
申请号：US17764768
申请日：2020-09-30
发明人： Takahiro Okazaki , Hiroyuki Sugiura
CPC分类号： C10M103/02 , C23C14/024 , C23C14/0605 , C23C14/325 , F16J9/26 , C10M2201/0413 , C10N2050/023
摘要： To provide a sliding member comprising a coating film exhibiting constant and stable chipping resistance and wear resistance and excellent in peeling resistance (adhesion), and the coating film thereof. The above-described problem is solved by a sliding member (10) comprising a coating film (1) on a sliding surface (16) on a base material (11). The coating film (1) has, when a cross section thereof is observed by a bright-field TEM image, a total thickness within a range of 1 μm to 50 μm, in repeating units including black hard carbon layers (B), relatively shown in black, and white hard carbon layers (W), relatively shown in white, and laminated in a thickness direction (Y). In the black hard carbon layer (B) and the white hard carbon layer (W) adjacent to each other, the white hard carbon layer (W) has higher hardness and a larger [sp2/(sp2+sp3)] ratio than the black hard carbon layer (B).
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公开(公告)号：US11867295B2
公开(公告)日：2024-01-09
申请号：US18027777
申请日：2021-09-30
申请人： TPR Co., Ltd.
发明人： Tomoyuki Sato , Yutaka Kitazume , Kiyoyuki Kawai , Haojie Fu
IPC分类号： F16J9/26
CPC分类号： F16J9/26
摘要： An object of the present invention is to provide a sliding member coated with a DLC coating in which microfractures on the sliding surface thereof due to the progression of cracks are less likely to occur, and in which an increase in abrasive wear can be reduced. The present invention achieves the above-mentioned object by a sliding member having, on the outer peripheral sliding surface thereof, a DLC coating in which the amount of plastic deformation work as measured by a nanoindentation test is within a specific range.
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公开(公告)号：US20230392687A1
公开(公告)日：2023-12-07
申请号：US18027702
申请日：2021-09-30
申请人： TPR Co., Ltd.
发明人： Tomoyuki Sato , Yutaka Kitazume , Tetsuya Nango
CPC分类号： F16J9/26 , C23C14/325 , C23C14/0605
摘要： An object of the present invention is to provide a sliding member coated with a DLC coating in which microfractures on the sliding surface thereof due to the progression of cracks are less likely to occur, and in which an increase in abrasive wear can be reduced. The present invention achieves the above-mentioned object by a sliding member having a DLC coating on the outer peripheral surface thereof, wherein an S band derived from sp3bonding is observed in the DLC coating in addition to a G band derived from the graphite structure and a D band derived from the defects of the graphite structure, and these bands satisfy specific relationships.
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公开(公告)号：US11788622B2
公开(公告)日：2023-10-17
申请号：US17523900
申请日：2021-11-10
发明人： Wentao Jiang
CPC分类号： F16J9/20 , C23C18/1689 , F16J9/26
摘要： A piston ring for an engine may include a piston ring body. The piston ring body may include a working surface, a lower surface, an upper surface, and an inner surface. An area of the working surface and/or the lower surface which is close to an outer circumferential lower edge of the piston ring body is not provided with a nitride layer, the outer circumferential lower edge is formed with a chamfer, the chamfer does not have a nitride layer, and an additional area of the piston ring has a nitride layer.
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公开(公告)号：US11767915B2
公开(公告)日：2023-09-26
申请号：US17226566
申请日：2021-04-09
发明人： Jodie Prudhomme , Matt Svrcek
摘要： 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, and the gap cover elements may engage with interfaces between the ring segments. The gap cover elements are configured to move radially outward and wear as the ring wears. The gap cover elements may include, for example, wedge-shaped features that engage with corresponding wedge recesses in the interfaces. The sealing ring assembly may include a high-pressure boundary and a low-pressure boundary. As the sealing ring wears, the gap cover elements stay engaged with the interfaces, so that ring gaps do not form on the low pressure boundary.
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9.发明申请公开(公告)号：US20190120379A1
公开(公告)日：2019-04-25
申请号：US16090197
申请日：2017-03-29
CPC分类号： F16J9/12 , C23C14/505 , C23C14/542 , F16J9/26
摘要： A piston ring may include a drawn metal base of constant thickness having an outer peripheral surface. The piston ring may also include a hard coating disposed on the outer peripheral surface. The coating may have a thickness that is greater in a region of two butt ends of the base than a thickness of the coating in another region of the outer peripheral surface. The coating may be defined by a plurality of layers with a nanoscale structure.
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公开(公告)号：US20190024795A1
公开(公告)日：2019-01-24
申请号：US16077235
申请日：2017-02-09
发明人： Peter ERNST , Jürgen RAMM , Florian SEIBERT , Beno WIDRIG
CPC分类号： F16J10/04 , C23C4/11 , C23C4/129 , C23C4/134 , C23C14/08 , C23C14/325 , F02B2023/0612 , F16J9/26
摘要： The present invention relates to a tribological system (1; 2) comprising a first body (102; 105) and a second body (101; 107), which each form a component of an internal combustion engine (100), in particular a piston (102), a piston ring (105) or a cylinder (101, 107), and the surfaces (112, 108, 113) of which have a first and a second material area (11, 12) which come into contact with each other at least in some regions during operation and form a tribological contact, wherein the first and/or the second material area (11, 12) is formed as a layer on the basis of chromium oxide or aluminum chromium oxide. The invention also relates to an internal combustion engine (100) having such a system (1; 2).
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