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公开(公告)号：US20240191332A1
公开(公告)日：2024-06-13
申请号：US18279539
申请日：2022-12-09
Applicant: TPR Co., Ltd.
Inventor： Koki Maeda , Fukutoshi Uchida
IPC: C22C38/58 , B22F3/00 , B22F3/16 , B22F3/26 , C22C33/02 , C22C38/00 , C22C38/04 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/52 , F01L3/02
CPC classification number: C22C38/58 , B22F3/004 , B22F3/16 , B22F3/26 , C22C33/0242 , C22C33/0285 , C22C38/002 , C22C38/04 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/52 , F01L3/02 , B22F2301/35 , B22F2998/10 , B22F2999/00
Abstract: The present invention solves a novel problem of corrosive wear that occurs in the use of a valve seat in an internal combustion engine using a hydrogen gas fuel. The problem is solved by an iron-based sintered alloy valve seat used in an internal combustion engine using a hydrogen gas fuel, in which the Cr content is 6% by mass to 23% by mass, the Mo content is 5% by mass to 20% by mass, the Cu content is 10% by mass to 23% by mass, the Co content is 3% by mass or more, and a total content of Cr, Mo, and Co is 14% by mass to 47% by mass.
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公开(公告)号：US20240110625A1
公开(公告)日：2024-04-04
申请号：US18275050
申请日：2022-01-25
Applicant: TPR Co., Ltd.
Inventor： Takashi Ozawa , Akira Hikone , Takashi Oguro
IPC: F16J9/20
CPC classification number: F16J9/20
Abstract: An outer peripheral surface of a compression ring includes a barrel curved surface, in a case where a width of the outer peripheral surface in an axial direction of the compression ring is set as L1, a condition of 0.2 mm ½×L1 is satisfied, and in a case where a distance in a radial direction of the compression ring between an outer peripheral peak and each of two points on the barrel curved surface separate from the outer peripheral peak by 0.1 mm in the axial direction of the compression ring is set as d1, and a distance in the radial direction of the compression ring between the outer peripheral peak and each of two points on the barrel curved surface separate from the outer peripheral peak by ¼×L1 in the axial direction of the compression ring is set as d2, a condition of d1
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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
Applicant: TPR Co., Ltd.
Inventor： Tomoyuki Sato , Yutaka Kitazume , Kiyoyuki Kawai , Haojie Fu
IPC: F16J9/26
CPC classification number: F16J9/26
Abstract: 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
Applicant: TPR Co., Ltd.
Inventor： Tomoyuki Sato , Yutaka Kitazume , Tetsuya Nango
CPC classification number: F16J9/26 , C23C14/325 , C23C14/0605
Abstract: 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：US20230272854A1
公开(公告)日：2023-08-31
申请号：US18026151
申请日：2021-07-30
Applicant: TPR Co., Ltd.
Inventor： Hiroyuki Nagakura , Shuichi Inamori , Akira Hikone
Abstract: A combination of piston rings assembled to a piston includes a first compression ring, a second compression ring, a third compression ring and an oil ring. When an axial width of the first compression ring is h1(1), an axial width of the second compression ring is h1(2), an axial width of the third compression ring is h1(3) and an axial width of the oil ring is h1(4), h1(1) ≥ h1(2) and h1(1) ≥ h1 (3), and when h1 (TOTAL) = h1 (1) + h1(2) + h1(3) + h1 (4), h1 (TOTAL) ≥ 3.9 mm.
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Patent Agency Ranking
公开(公告)号：US11680537B2
公开(公告)日：2023-06-20
申请号：US17770749
申请日：2019-11-06
Applicant: TPR Co., Ltd. , TPR Industry Co., Ltd.
Inventor： Masayuki Ohira , Naoki Umeda , Seiji Tamaki , Takashi Sato , Takashi Oizumi
CPC classification number: F02F1/004
Abstract: The present invention addresses the problem of providing a cylinder liner or a cylinder bore, which can reduce not only friction on a sliding surface but also oil consumption. In a piston sliding direction of the cylinder bore, grooves of a second sliding region positioned on the side of crankcase have a higher groove area ratio at a depth of 0.3 μm than grooves of a first sliding region positioned on the side of combustion chamber, and the groove area ratio is in a specific range, whereby friction and oil consumption can be reduced.
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公开(公告)号：US11460073B2
公开(公告)日：2022-10-04
申请号：US17624109
申请日：2021-08-24
Applicant: TPR CO., LTD.
Inventor： Hideyoshi Noguchi , Yasuyuki Yokoyama
Abstract: Oil grooves (40) formed in at least one of surfaces of a ring-shaped member (30) each have a longitudinal direction that forms an angle falling within a range of from 40 degrees to 75 degrees with respect to a radial direction of the ring-shaped member, and are arranged at equal intervals in a circumferential direction of the ring-shaped member (30). The oil grooves (40) include communicating oil grooves (40A) and non-communicating oil grooves (40B) formed to extend to the vicinity of an outer peripheral end (34), and are arranged with periodic regularity in the circumferential direction of the ring-shaped member (30). In addition, a communicating oil groove area ratio expressed by Expression: “S1/(S1+S2)” falls within a range of from 0.15 to 0.85, where S1 represents a sum of plane areas of the communicating oil grooves (40A), S2 represents a sum of the non-communicating oil grooves (40B).
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28.发明申请公开(公告)号：US20220307443A1
公开(公告)日：2022-09-29
申请号：US17439433
申请日：2020-06-18
Applicant: TPR Industry Co., Ltd. , TPR Co., Ltd.
Inventor： Akira Sato , Takashi Sato , Kiyoyuki Kawai
IPC: F02F1/00
Abstract: Provided is a spiny liner that may further improve bonding strength when being integrated with metal on the outer peripheral surface side. The spiny liner includes a plurality of projections including constricted projections on the surface. Denoting the number of constricted projections per 100 mm2 out of the projection by Pc, the average height of projections by h (mm), and the average of maximum thicknesses and the average of minimum thicknesses of any 20 projections out of the constricted projections by dw (mm) and dn (mm), respectively, the total value of (I) and (II) below is 1.55 or more. (I)=Pc×[(0.35 hπ/12)×(2dw2−dw×dn−dn2)] (I)=Pc×{(dn2/4)×r×0.35h}
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公开(公告)号：US11377358B2
公开(公告)日：2022-07-05
申请号：US16802722
申请日：2020-02-27
Applicant: TOHOKU TECHNO ARCH CO., LTD. , TPR CO., LTD.
Inventor： Hidemi Kato , Masashi Tsuda , Yugo Takano , Yosuke Suzuki , Tsutomu Chino , Koji Kamata , Shota Muronaka
IPC: C01B31/08 , C01B32/348 , C22C1/10 , C22C32/00 , C01B32/30 , C01B32/306
Abstract: A novel method for producing a porous carbon material which makes it possible to easily produce a porous carbon material having a desired shape. The method includes immersing a carbon-containing material having a desired shape and composed of a compound, alloy or non-equilibrium alloy containing carbon in a metal bath, the metal bath having a solidification point that is lower than a melting point of the carbon-containing material, the metal bath being controlled to a lower temperature than a minimum value of a liquidus temperature within a compositional fluctuation range extending from the carbon-containing material to carbon by decreasing the other non-carbon main components, to thereby selectively elute the other non-carbon main components into the metal bath while maintaining an external shape of the carbon-containing material to give a porous carbon material having microvoids.
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公开(公告)号：US11320049B2
公开(公告)日：2022-05-03
申请号：US17265895
申请日：2019-10-28
Applicant: TPR Co., Ltd.
Inventor： Tetsuya Nango
Abstract: In this piston ring combination, a second outer peripheral surface, which is the outer peripheral surface of a second ring, has a second protruding surface curved into a convex shape, and a pair of third outer peripheral surfaces, which are the outer peripheral surfaces of a pair of segments, each have a third outer peripheral area in which a third protruding surface is formed, the third protruding surfaces being curved into convex shapes. In at least one of the pair of third outer peripheral surfaces, the peripheral edge on a crank-chamber side is positioned farther outward in the diametrical direction than the peripheral edge on a combustion-chamber side, and a peak of the third protruding surface is positioned nearer to the crank chamber than the center of the third outer peripheral surface.
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