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61. 发明授权

US11994219B2 Side rail and oil control ring comprising same 有权
公开(公告)号：US11994219B2
公开(公告)日：2024-05-28
申请号：US18550701
申请日：2022-03-04
申请人： KABUSHIKI KAISHA RIKEN
发明人： Hiroyuki Yabune , Yoshiyuki Hirade , Kentaro Miyagawa
IPC分类号： F16J9/20
CPC分类号： F16J9/20
摘要： A side rail forms an oil control ring together with a spacer expander, and includes: an outer peripheral surface; an inner peripheral surface having a vertically symmetrical shape in an axial cross section; a first side surface; and a second side surface. The inner peripheral surface includes an inner tip portion satisfying following Condition 1 in an axial cross section.

0.7≤R1/h0≤1.1 Condition 1:

In the expression, R1 represents a curvature radius (unit: mm) of a curve forming the inner tip portion, and h0 represents a height (unit: mm) of the side rail.

62. 发明授权

US11946109B2 Spheroidal graphite cast iron and method of producing spheroidal graphite cast iron, and vehicle undercarriage parts 有权
公开(公告)号：US11946109B2
公开(公告)日：2024-04-02
申请号：US17595000
申请日：2020-04-14
申请人： KABUSHIKI KAISHA RIKEN
发明人： Tomoyuki Tobita
IPC分类号： C21D5/00 , C21C1/10 , C22C33/04 , C22C37/04
CPC分类号： C21D5/00 , C21C1/10 , C22C33/04 , C22C37/04 , C21D2211/009
摘要： A spheroidal graphite cast iron having a chemical composition of: C: 3.0% to 4.0%, Si: 2.0% to 2.4%, Cu: 0.20% to 0.50%, Mn: 0.15% to 0.35%, S: 0.005% to 0.030%, Mg: 0.03% to 0.06%, each by mass, and the balance being Fe and inevitable impurities, where Mn and Cu are contained at 0.45% to 0.75% in total; and a structure in which a ferrite layer encloses spheroidal graphite crystallized out in a matrix of pearlite. Part of the pearlite is extended from the matrix side to the spheroidal graphite side to divide the ferrite layer at one or more areas.

63. 发明授权

US11821524B2 Combination of cylinder and piston ring 有权
公开(公告)号：US11821524B2
公开(公告)日：2023-11-21
申请号：US17757092
申请日：2020-11-19
申请人： KABUSHIKI KAISHA RIKEN
发明人： Akio Shinohara
IPC分类号： C23C14/06 , F16J9/26 , F16J9/28
CPC分类号： F16J9/26 , F16J9/28
摘要： The present disclosure is a combination of a cylinder and a piston ring, the combination including a cylinder of an internal combustion engine and a piston ring sliding on an inner peripheral surface of the cylinder. The piston ring has an outer peripheral surface sliding on the inner peripheral surface of the cylinder, and the outer peripheral surface is formed of a substantially hydrogen-free amorphous carbon coating. The Vickers hardness Hd of the amorphous carbon coating and the Vickers hardness Hb of the inner peripheral surface of the cylinder satisfy Hd+Hb≤2500 HV. The ratio ID/IG of the peak intensity of the D band to the peak intensity of the G band in a Raman spectrum obtained by measuring the amorphous carbon coating by Raman spectroscopy is 0.60 or more and 1.33 or less.

64. 发明申请

US20230013831A1 COMPRESSION RING 有权
公开(公告)号：US20230013831A1
公开(公告)日：2023-01-19
申请号：US17784434
申请日：2020-12-03
申请人： KABUSHIKI KAISHA RIKEN
发明人： Hiroaki SAITO , Yoshio OKADA
IPC分类号： F16J9/26 , F16J9/12
摘要： To provide a long-life compression ring without an increase in the outer peripheral abrasion near the gap regardless of the ring material or the presence or absence of the outer peripheral hard coating, in an annular compression ring having a pair of gap faces opposed to each other to form a free gap and a nominal diameter d1 equal to an inner diameter of a cylinder to which the compression ring is attached to along with a piston, a self tangential force is 5 N to 50 N, and a radius of curvature R1 and the nominal diameter d1 satisfy a relationship: −0.01≤(2R1−d1)/d1

65. 外观设计

USD927574S1 Spacer for internal combustion engines 有权
公开(公告)号：USD927574S1
公开(公告)日：2021-08-10
申请号：US35508682
申请日：2019-07-04
申请人： KABUSHIKI KAISHA RIKEN
设计人： Satoshi Koizumi , Hiroshi Shimizu

66. 发明授权

US11028925B2 Seal ring 有权
公开(公告)号：US11028925B2
公开(公告)日：2021-06-08
申请号：US15573740
申请日：2016-10-05
申请人： KABUSHIKI KAISHA RIKEN
发明人： Namsun Park
IPC分类号： F16J15/28 , F16J15/18 , F16J15/3272 , F16J15/34
摘要： [Object] To provide a seal ring capable of both reducing a friction loss and reducing oil leakage.
[Solving Means] A seal ring includes: an inner circumferential surface; an outer circumferential surface orthogonal to the inner circumferential surface; side surfaces orthogonal to the inner circumferential surface and the outer circumferential surface; and a plurality of pockets provided, spaced apart from one another in one of the side surfaces. The plurality of pockets each have a symmetrical shape in a circumferential direction and are opened on a side of the inner circumferential surface and closed on a side of the outer circumferential surface. The plurality of pockets each include circumferential end portions that are provided in end portions in the circumferential direction and are R-surfaces each having a convex shape connected to the side surface, a bottom portion provided in a central region in the circumferential direction, and inclined portions each extending between each of the circumferential end portions and the bottom portion. The inclined portions each include at least one ridge portion, a first inclined portion extending between the bottom portion and the ridge portion and forming a first angle with respect to the side surface, and a second inclined portion extending between the circumferential end portion and the ridge portion and forming a second angle smaller than the first angle with respect to the side surface.

67. 外观设计

USD920408S1 Piston ring for internal combustion engine 有权
公开(公告)号：USD920408S1
公开(公告)日：2021-05-25
申请号：US35507464
申请日：2019-03-25
申请人： KABUSHIKI KAISHA RIKEN
设计人： Hiroshi Shimizu

68. 发明申请

US20200248808A1 SIDE RAIL 审中-公开
公开(公告)号：US20200248808A1
公开(公告)日：2020-08-06
申请号：US16652071
申请日：2018-09-25
申请人： KABUSHIKI KAISHA RIKEN
发明人： Yasuhiro IWATA , Hiroshi SHIMIZU , Yuichiro TAKEZAWA
IPC分类号： F16J9/20
摘要： Provided is a side rail 1 having an outer peripheral surface 14, an inner peripheral surface 13, a first axial side surface 11, and a second axial side surface 12 parallel to the first axial side surface 11, in which, a beveled portion 30 is provided between the outer peripheral surface 14 and the second axial side surface 12, the beveled portion 30 is formed in a tapered surface having a diameter gradually decreasing from the first axial side surface 11 toward the second axial side surface in an axial direction; a tapered surface 30a is provided between a first tapered surface portion 30a1 with an angle of 10° or more to the axial direction and a second tapered surface portion 30a2 provided between the first tapered surface portion 30a1 and the outer peripheral surface 14 and having a smaller angle of inclination to the axial direction than that of the first tapered surface portion.

69. 发明申请

US20190360366A1 SINTERED VALVE SEAT 审中-公开
公开(公告)号：US20190360366A1
公开(公告)日：2019-11-28
申请号：US15778039
申请日：2017-12-01
申请人： KABUSHIKI KAISHA RIKEN
发明人： Kimiaki HASHIMOTO
IPC分类号： F01L3/02 , C22C19/07 , C22C38/24 , C22C38/22 , C22C38/28 , C22C38/04 , C22C38/02 , C22C27/04 , B22F1/00 , B22F5/10
摘要： To provide a sintered valve seat having excellent valve coolability making it usable for high-efficiency engines, as well as excellent deformation resistance, wear resistance and detachment resistance, the valve seat is provided with a two-layer structure having a seat layer repeatedly abutting a valve face, and a support layer abutting bottom and inner peripheral surfaces of a valve-seat-press-fitting opening of a cylinder head; the seat layer containing at least one selected from Co-based hard particles and Fe-based hard particles in a matrix of Cu or its alloy; and the support layer containing at least one selected from Fe particles and Fe alloy particles in a matrix of Cu or its alloy.

70. 发明授权

US10428943B2 Side rail 有权
公开(公告)号：US10428943B2
公开(公告)日：2019-10-01
申请号：US15551673
申请日：2016-03-03
申请人： KABUSHIKI KAISHA RIKEN
发明人： Yuichiro Takezawa , Tatsuya Miyajima
IPC分类号： F16J9/06 , F16J9/20 , F02F5/00 , F16J9/26
摘要： A side rail (1) is formed in a sprit ring shape with an opening (10) and to be mounted on a space expander (2) in an annular shape to constitute, together with the space expander (2), a multi-piece oil ring (3) used in an internal combustion engine. The side rail (1) includes an outer peripheral surface (14) facing radially outward, an inner peripheral surface (13) facing radially inward, a first axial surface (11) facing a crankcase, a second axial surface (12) facing a combustion chamber and parallel to the first axial surface (11), and a protrusion (20) formed on the outer peripheral surface (14) in a position offset from an intermediate position between the first axial surface (11) and the second axial surface (12) toward the first axial surface (11) and protruding radially outward from the outer peripheral surface (14).

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