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公开(公告)号：US12292118B2
公开(公告)日：2025-05-06
申请号：US18839495
申请日：2022-11-16
Applicant: TPR Co., Ltd.
Inventor： Yushi Abe , Naoki Umeda , Masayuki Ohira , Akira Hikone
IPC: F16J9/20
Abstract: An outer circumferential surface of a piston ring has a cut surface forming a notched portion between an outer circumferential end surface and a lower surface, the cut surface including a first surface between the outer circumferential end surface and a bottom portion, and a second surface between the bottom portion and the lower surface. The second surface is inclined away from a central axis of the piston ring as it extends toward a crank chamber side, an angle of inclination of the second surface with respect to the bottom portion being greater than or equal to 50° and less than or equal to 85°. When an axial width of the piston ring is h1 and a distance in an axial direction between a connecting portion between the cut surface and the outer circumferential end surface and a connecting portion between the cut surface and the lower surface is H, H/h1 is greater than or equal to 0.2 and less than or equal to 0.4.
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公开(公告)号：US12196325B2
公开(公告)日：2025-01-14
申请号：US18275050
申请日：2022-01-25
Applicant: TPR Co., Ltd.
Inventor： Takashi Ozawa , Akira Hikone , Takashi Oguro
IPC: 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：US11951547B2
公开(公告)日：2024-04-09
申请号：US16627682
申请日：2018-10-23
Applicant: TPR CO., LTD.
Inventor： Yoshio Bando , Fumiya Ito , Kenichi Harashina
CPC classification number: B22F5/008 , B22F3/16 , C22C38/16 , F01L3/08 , B22F2301/10 , B22F2301/35 , F01L2301/00 , F01L2303/00 , B22F2998/10 , B22F1/17 , B22F1/09 , B22F3/02 , B22F3/10
Abstract: Provided are a valve guide made of an iron-based sintered alloy excellent in wear resistance and thermal conductivity, and a method of producing the same. Specifically, provided are a method of producing a valve guide made of an iron-based sintered alloy, the method including the steps of: molding raw material powder including diffusion-alloyed powder including core iron powder and Cu bonded to the core iron powder through diffusion to obtain a molded body; and sintering the molded body, to thereby produce a valve guide made of an iron-based sintered alloy, and a valve guide produced by the production method.
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公开(公告)号：US11867294B2
公开(公告)日：2024-01-09
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 , C23C14/0605 , C23C14/325
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 sp3 bonding 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：US20230381855A1
公开(公告)日：2023-11-30
申请号：US18363308
申请日：2023-08-01
Applicant: TPR CO., LTD. , TPR INDUSTRY CO., LTD.
Inventor： Hideki AIZAWA , Takeshi TAKITA , Kazuhiko OIZUMI
Abstract: A casting system (10) includes a plurality of mold tables (41 and 42), molten metal pouring trucks (21 and 22), and a molten metal supply furnace (30). The mold tables are each provided with centrifugal casting molds (81 to 84 and 91 to 94). Each molten metal pouring truck can move to the position of each mold table and pour molten metal into the molds installed on the mold table. The molten metal supply furnace supplies molten metal to the molten metal pouring trucks.
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Patent Agency Ranking
公开(公告)号：US11499498B2
公开(公告)日：2022-11-15
申请号：US17296877
申请日：2019-07-23
Applicant: TPR CO., LTD. , TPR INDUSTRY CO., LTD.
Inventor： Yuki Kuromasa , Koichi Hatakeyama , Takashi Ozawa
Abstract: A cylinder liner of the present invention is a cylinder liner mounted on a cylinder block and formed of flaky graphite cast iron, at least a nitrided layer is provided on an inner periphery of the cylinder liner, and a cross hatching section is formed on the inner periphery, a roughness curve of the inner periphery has a plateau honing shape, a ten-point average roughness Rz of the inner periphery pursuant to JIS B0601:1982 is 4.0 μm or less, and an average value of an area ratio of pits generated in the inner periphery is 8% or less.
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公开(公告)号：US20220213928A1
公开(公告)日：2022-07-07
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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公开(公告)号：US20220025829A1
公开(公告)日：2022-01-27
申请号：US17296877
申请日：2019-07-23
Applicant: TPR CO., LTD. , TPR INDUSTRY CO., LTD.
Inventor： Yuki KUROMASA , Koichi HATAKEYAMA , Takashi OZAWA
Abstract: A cylinder liner of the present invention is a cylinder liner mounted on a cylinder block and formed of flaky graphite cast iron, at least a nitrided layer is provided on an inner periphery of the cylinder liner, and a cross hatching section is formed on the inner periphery, a roughness curve of the inner periphery has a plateau honing shape, a ten-point average roughness Rz of the inner periphery pursuant to JIS B0601:1982 is 4.0 μm or less, and an average value of an area ratio of pits generated in the inner periphery is 8% or less.
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公开(公告)号：US20210135226A1
公开(公告)日：2021-05-06
申请号：US16970264
申请日：2019-10-31
Applicant: TPR CO., LTD. , iElectrolyte CO., LTD.
Inventor： Kazunari SOEDA , Takuya TAKAHASHI
IPC: H01M4/62 , C08K5/098 , C08K5/1545 , C08K3/22 , C08K3/26
Abstract: An aspect of the present invention provides a binder which makes it possible to obtain an electrode excellent in heat resistance. The binder contains: a re-emulsifiable resin powder coated with inorganic particles; and a metal-crosslinking thickening agent forming a hydrophobic gel by being crosslinked, in an aqueous system, via metal ions derived from an electrode active material.
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公开(公告)号：US10907570B2
公开(公告)日：2021-02-02
申请号：US16491135
申请日：2018-12-12
Applicant: TPR Co., Ltd. , TPR Industry Co., Ltd.
Inventor： Akira Sato , Takashi Sato , Mako Abe
Abstract: To provide a cast iron cylindrical member capable of improving the bonding strength when metal on the outer peripheral side and the cast iron cylindrical member are integrated. For this objective, in a cast iron cylindrical member including a plurality of projections including constricted projections on the outer peripheral surface, the anchor portion index (I) represented by {(Aav2−Bav2)×π/4×Pn×Pr/100}×0.35H/2 is set in a specific range.
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