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1. 发明授权

US11293548B2 Sliding member and coating film 有权
公开(公告)号：US11293548B2
公开(公告)日：2022-04-05
申请号：US16624781
申请日：2018-06-15
申请人： NIPPON PISTON RING CO., LTD. , NIPPON ITF, INC.
发明人： Takahiro Okazaki , Yoshihiro Ito , Hiroyuki Sugiura , Shinya Kanazawa , Hideki Moriguchi , Akinori Shibata , Takehiko Ooshiro
IPC分类号： F16J9/26 , C01B32/05 , C23C14/16 , C23C14/32
摘要： A sliding member (10) including a coating film (1) composed of a hard carbon layer on a sliding surface (16) of a base material (11). The coating film has, when a cross section thereof is observed by a bright-field TEM image, a thickness within a range of 1 μm to 50 μm, and is configured by 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, and comprise an inclined region, provided on a base material side, where thicknesses of white hard carbon layers (W) of the repeating units gradually increase in a thickness direction, and a homogeneous region\, provided on a surface side of the sliding member, where thicknesses of the white hard carbon layers (W) of the repeating units are the same or substantially the same in the thickness direction.

2. 发明申请

US20220003316A1 PISTON RING 有权
公开(公告)号：US20220003316A1
公开(公告)日：2022-01-06
申请号：US17291464
申请日：2019-10-31
申请人： NIPPON PISTON RING CO., LTD.
发明人： Kyoichi IKEYA , Ofuyu SAKAI , Makoto KAJIWARA
IPC分类号： F16J9/20 , F16J9/26
摘要： 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 solved by a piston ring (1) for an internal combustion engine formed so as to have a tapered shape by a peripheral surface (14) that gradually projects outward from a top to a bottom, and a radial cross-sectional shape of a Napier ring. The peripheral surface (14) is constituted by an outer edge end portion (14b) that has a non-tapered shape and comes into sliding contact, as a peripheral sliding surface, with a mating material, an outer peripheral tapered part (14a) formed at a predetermined taper angle (α) above the outer edge end portion (14b), a curved surface part (14c) having a diameter that gradually decreases inward from the outer edge end portion (14b) to a lower end in an axial direction, and a lower end portion (14d) forming a section of the curved surface part (14c). A distance (d2) between a position (A) of the outer edge end portion (14b) and a position (C) of the lower end portion (14d) in a ring axial direction is within a range of 0.001 mm to 0.05 mm, and a contact width (d1) of the outer edge end portion (14b) in the ring axial direction is within a range of 0.01 mm to 0.3 mm.

3. 发明申请

US20210215071A1 IRON-BASED SINTERED ALLOY VALVE SEAT FOR INTERNAL COMBUSTION ENGINE 有权
公开(公告)号：US20210215071A1
公开(公告)日：2021-07-15
申请号：US17054840
申请日：2019-05-14
申请人： NIPPON PISTON RING CO., LTD.
发明人： Ayato OIKAWA , Kiyoshi SUWA , Katsuaki OGAWA , Hiroshi OSHIGE , Kenichi SATO
IPC分类号： F01L3/02 , B22F5/00
摘要： Provided is a valve seat insert for an internal combustion engine, which has both an excellent heat dissipation property and excellent wear resistance. The valve seat insert for an internal combustion engine is used while being press-fitted into an aluminum alloy cylinder head, is made of an iron-based sintered alloy, is formed by integrating two layers of a functional member side layer and a supporting member side layer, and has a plating film on at least an outer peripheral side. The plating film is preferably a copper plating film. The plating film is a plating film having a thickness of 1 to 100 μm and a hardness of 50 to 300 HV, and the hardness of the plating film is adjusted so as to satisfy a range of 1.05 to 4.5 times hardness of the cylinder head in Vickers hardness HV. Pores contained in the valve seat insert are preferably sealed with a curable resin before plating treatment. Consequently, a valve seat insert for an internal combustion engine which does not go through complicated processes, is not accompanied by a significant decrease in wear resistance compared with the prior art, and has an excellent heat dissipation property is provided. If a roughened surface region is further formed at at least one portion on the outer peripheral surface of the valve seat insert in addition to the plating film, a falling out resistance property is improved. The same effect can be obtained even if the valve seat insert is a single layer of only the functional member side layer.

4. 发明授权

US11051904B2 Marker for use in living body and instrument set for inserting marker for use in living body 有权
公开(公告)号：US11051904B2
公开(公告)日：2021-07-06
申请号：US16078078
申请日：2017-02-23
申请人： NIPPON PISTON RING CO., LTD.
发明人： Hiroshi Matsushima , Takasumi Kubo , Yuki Kimura , Yoshiki Ishikawa , Takashi Kawabata
IPC分类号： A61B90/00 , A61B6/12
摘要： A marker for use in a living body includes an indicator part to be placed in a living body for a predetermined period of time, and the indicator part is configured to indicate information on the living body or information on the indicator part by means of a difference in X-ray image. Thus, there are provided the marker for use in a living body and an instrument set for inserting the marker for use in a living body capable of identifying a predetermined site in a living body easily and accurately.

5. 发明授权

US10578214B2 Piston ring and manufacturing method therefor 有权
公开(公告)号：US10578214B2
公开(公告)日：2020-03-03
申请号：US15739344
申请日：2016-07-29
申请人： NIPPON PISTON RING CO., LTD.
发明人： Takuya Ozaki , Hiroyuki Sugiura
IPC分类号： F16J9/26 , F02F5/00 , C23C14/06 , C23C14/32 , C23C14/54
摘要： To provide a piston ring comprising a hard carbon film that is easy to form and exhibits excellent adhesion and wear resistance, and a manufacturing method therefor. The above-described problem is solved by means of a piston ring comprising a hard carbon film 50 formed on at least an outer peripheral sliding surface 11 of a piston ring base material 1, wherein the hard carbon film 50 is a laminated film comprising a plurality of layers, including an upper layer 5 with a lamination pitch within a range of 3 nm to 50 nm inclusive, a middle layer 4 with a lamination pitch less than that of the upper layer 5, and a lower layer 3 with a lamination pitch within the same range as that of the upper layer 5 and greater than that of the middle layer 4. This hard carbon film 50 may be configured to have an sp2 component ratio within a range of 35% to 80% inclusive, measured in a TEM-EELS spectrum formed by combining electron energy loss spectroscopy (EELS) with a transmission electron microscope (TEM), and a hydrogen content within a range of 0.1 atom % to 5 atom % inclusive.

6. 发明授权

US10457885B2 Coating film, manufacturing method for same, and PVD device 有权
公开(公告)号：US10457885B2
公开(公告)日：2019-10-29
申请号：US15511638
申请日：2014-09-17
申请人： NIPPON ITF, INC. , NIPPON PISTON RING CO., LTD.
发明人： Hideki Moriguchi , Tadashi Saito , Yoshikazu Tanaka , Akinori Shibata , Tetsumi Arahi , Katsuaki Ogawa , Takahiro Okazaki , Hiroyuki Sugiura , Yoshihiro Ito
IPC分类号： C10M103/02 , C23C14/06 , C01B32/05 , C23C14/32
摘要： Provided are a coating film, a manufacturing method for the same, and a PVD device that not only sufficiently improve the balance of low-friction properties and wear resistance, but also improve chipping resistance and peeling resistance. This film is coated on a substrate surface, wherein the coating film has a hard carbon that presents relatively black and white when observed in a cross-sectional bright-field TEM image, a mesh-shaped hard carbon layer is formed using a PVD method, said layer having white-colored hard carbon in a mesh shape extending in the thickness direction and black-colored hard carbon dispersed into the cavities in the mesh, and the ID/IG ratio is 1-6 when the mesh-shaped hard carbon layer is measured using Raman spectroscopy, said ratio being the ratio of the Raman spectrum D band peak area intensity and G band peak area intensity.

7. 发明授权

US09863534B2 Hard carbon coating film 有权
公开(公告)号：US09863534B2
公开(公告)日：2018-01-09
申请号：US14768786
申请日：2014-02-27
申请人： NIPPON PISTON RING CO., LTD.
发明人： Takuya Ozaki , Hiroyuki Sugiura
IPC分类号： F16J9/28 , F16J9/26 , C23C14/06 , C23C14/32
CPC分类号： F16J9/28 , C23C14/0605 , C23C14/325 , F16J9/26
摘要： A piston ring having a hard carbon coating film is provided that can be easily formed in the same batch, does not cause delamination, and is excellent in initial running-in and wear resistance.A hard carbon coating film is formed at least on an outer peripheral sliding surface of a piston ring base and contains substantially no hydrogen, wherein the hard carbon coating film has an sp2 content ratio ranging from 40% to 80% measured in a TEM-EELS spectrum where transmission electron microscopy (TEM) and electron energy-loss spectroscopy (EELS) are combined together, and an area ratio of contained macro particles on a surface of the hard carbon coating film ranges from 0.1% to 10.0%.

8. 发明申请

US20170335965A1 METHOD FOR PRODUCING PISTON RING WITH RECESS 审中-公开
公开(公告)号：US20170335965A1
公开(公告)日：2017-11-23
申请号：US15672942
申请日：2017-08-09
申请人： NIPPON PISTON RING CO., LTD.
发明人： Kazuhiro FUJIMURA , Atsushi CHIBA , Naoyuki AKIMOTO , Iwao HIRAISHI
IPC分类号： F16J9/26 , F16J9/20 , C23C14/06
摘要： A method for producing a piston ring for a cylinder that moves in a sliding direction includes providing a piston ring base material having an upper surface, a lower surface and an outer circumferential surface having a first recess between the upper surface and the lower surface, forming a hard film in the first recess and on a cylindrical surface at a predetermined thickness, and removing, by performing a polishing process on the sliding surface, the hard film formed on the cylindrical surface and a part of the piston ring base material disposed adjacent to the removed hard film, to form a second recess. The second recess is formed by removing an area of the removed part of the piston ring base material as a result of polishing the sliding surface due to a difference in the hardness of the hard film and the piston ring base material.

9. 发明申请

US20170227126A1 COMBINED OIL RING 审中-公开
公开(公告)号：US20170227126A1
公开(公告)日：2017-08-10
申请号：US15329282
申请日：2015-07-22
申请人： NIPPON PISTON RING CO., LTD.
发明人： Masataka KAWASAKI , Mamoru MIYAMOTO , Hideshi HITOSUGI , Kenji ARAI
IPC分类号： F16J9/06 , F16J9/20
摘要： Provided is a combined oil ring that further reduces engine oil consumption.A combined oil ring attached to an oil ring groove of a piston includes: a pair of upper and lower side rails each formed into a flat annular shape, and having a slide contact part that comes into sliding contact with a cylinder; and a spacer expander arranged between the pair of upper and lower side rails. In at least the upper side rail of the pair of upper and lower side rails, a cross-sectional shape of the slide contact part along an axial direction of the piston is a tapered shape linearly spreading from upper to lower parts of the piston; the tapered shape is at an angle of 5 to 30 degrees with respect to a central axis of the spacer expander, and has a vertex of the tapered shape within 0.15 mm from a lower end of the side rail; and a part closer to the lower end than the vertex is formed into a curved shape having a curvature of R0.01 to 0.5.

10. 发明申请

US20160326919A1 ASSEMBLY OF INTERNAL COMBUSTION ENGINE VALVE AND VALVE SEAT 审中-公开
标题翻译：内燃机阀门和阀座组装
公开(公告)号：US20160326919A1
公开(公告)日：2016-11-10
申请号：US15108470
申请日：2014-12-17
申请人： NIPPON PISTON RING CO., LTD. , NITTAN VALVE CO., LTD.
发明人： Satoshi IKEMI , Hiroshi OSHIGE , Kiyoshi SUWA , Kenichi SATO , Kouji KUNITAKE , Ryouichi YOSHINO
IPC分类号： F01L3/14 , B22F7/02 , F01L3/02
CPC分类号： F01L3/14 , B22F7/02 , B22F7/062 , C22C33/02 , C22C38/00 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/44 , C22C38/46 , C22C38/52 , F01L3/02 , F01L3/18
摘要： In an assembly of a hollow poppet valve and a valve seat insert, the hollow poppet valve's head is integrally formed with a stem end, a hollow part is formed from the head to a stem, and coolant is filled into the hollow part along with an inert gas. The valve seat insert is formed of iron base sintered alloy and obtained by integrating two layers of a supporting material side layer and a valve contact face side layer. The hollow poppet valve is formed of a material having thermal conductivity of 5-45 (W/m·K) at 20-1000° C. The valve seat insert includes the supporting material side layer having thermal conductivity of 23-50 (W/m·K) at 20-300° C. and a valve contact face side layer having thermal conductivity of 10-22 (W/m·K) at 20-300° C. This enables a valve temperature decrease throughout an engine's entire RPM range compared with the prior art.
摘要翻译：在中空提升阀和阀座插入件的组件中，中空提升阀的头部与杆端一体地形成，中空部分由头部到杆形成，并且冷却剂以及惰性气体。阀座插件由铁基烧结合金形成，通过将两层支撑材料侧层和阀接触面侧层整合而获得。中空提升阀由在20-1000℃导热率为5-45（W / m·K）的材料形成。阀座插件包括导热率为23-50（W / m·K）的支撑材料侧层， m·K）和在20-300℃下具有10-22（W / m·K）的导热率的阀接触面侧层。这使得整个发动机的整个转速下的阀门温度降低范围与现有技术相比。

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