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公开(公告)号：US11242929B2
公开(公告)日：2022-02-08
申请号：US17254546
申请日：2019-06-13
Applicant: TPR Co., Ltd.
Inventor： Tomoyuki Sato , Yutaka Kitazume , Takatsugu Iwashita
Abstract: The present invention addresses the problem of providing a piston ring covered with a DLC coating that has excellent wear resistance and shows a low attacking property on a cylinder bore sliding surface. The problem is solved by a piston ring which is used in the presence of an engine lubricating oil and includes a DLC coating on an outer peripheral sliding surface. The DLC coating has an sp2 component ratio of 0.5 to 0.85 as determined from a TEM-EELS spectrum obtained by a combination of a transmission electron microscope (TEM) and electron energy loss spectroscopy (EELS), as well as a coating hardness of 12 GPa to 26 GPa and a Young's modulus of 250 GPa or less as measured by a nanoindentation method.
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公开(公告)号：US20210367242A1
公开(公告)日：2021-11-25
申请号：US17291570
申请日：2019-04-26
Applicant: TPR CO., LTD. , iElectrolyte CO., LTD.
Inventor： Kazunari SOEDA , Takuya TAKAHASHI
IPC: H01M4/62 , H01M4/48 , H01M10/0525
Abstract: Provided is a binder that makes it possible to prepare a slurry for an electrode with use of water as a solvent and without causing alkalinization of the slurry for the electrode, even in a case where an electrode active material that is highly prone to hydrolysis is used. The binder contains: a pH adjustment functional agent which neutralizes a base in an aqueous system; and a metal-crosslinking thickening agent forming a hydrophobic gel by being crosslinked, in the aqueous system, via metal ions derived from an electrode active material.
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公开(公告)号：US11168642B2
公开(公告)日：2021-11-09
申请号：US16979229
申请日：2018-12-12
Applicant: TPR Co., Ltd. , TPR Industry Co., Ltd.
Inventor： Koichi Hatakeyama , Tomoki Takiguchi , Yoshihiko Aoki , Yuusuke Okuyama , Mako Abe
Abstract: The present invention addresses the problem of providing a cylinder liner for insert casting, with which the bonding strength between a cylinder liner and a cylinder block can be improved by reducing voids generated on the cylinder block. The problem is solved by a cylinder liner for insert casting which includes plural projections on its outer peripheral surface and satisfies the following (i) and (ii): (i) the number of the projections is 5 to 50 per 1 cm2 on the outer peripheral surface, and (ii) when two 15.2 mm×0.03 mm lines are set in parallel with a gap of 3.8 mm therebetween at an arbitrary position on the outer peripheral surface of the cylinder liner, the total number of projections that are in contact with the two lines is 8 or less.
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公开(公告)号：US20210270370A1
公开(公告)日：2021-09-02
申请号：US17254546
申请日：2019-06-13
Applicant: TPR Co., Ltd.
Inventor： Tomoyuki Sato , Yutaka Kitazume , Takatsugu Iwashita
Abstract: The present invention addresses the problem of providing a piston ring covered with a DLC coating that has excellent wear resistance and shows a low attacking property on a cylinder bore sliding surface. The problem is solved by a piston ring which is used in the presence of an engine lubricating oil and includes a DLC coating on an outer peripheral sliding surface. The DLC coating has an sp2 component ratio of 0.5 to 0.85 as determined from a TEM-EELS spectrum obtained by a combination of a transmission electron microscope (TEM) and electron energy loss spectroscopy (EELS), as well as a coating hardness of 12 GPa to 26 GPa and a Young's modulus of 250 GPa or less as measured by a nanoindentation method.
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公开(公告)号：US10760687B2
公开(公告)日：2020-09-01
申请号：US15742451
申请日：2017-03-13
Applicant: TPR CO., LTD.
Inventor： Hitoshi Yamaguchi , Teppei Oga
IPC: F16J15/3272 , F16J15/3284 , F16J15/44 , F16J15/48 , F16J15/32 , F16J15/16
Abstract: To fulfill a sealing function for a fluid within a short period of time when a pump configured to pressure-feed the fluid is activated, provided are a seal ring, including: a first side surface (20); a second side surface (30) being a side surface on a side opposite to the first side surface (20); and a first side-surface side projecting portion (40) formed on the first side surface (20), in which a distal end portion (42) of the first side-surface side projecting portion (40) projects most toward an outward side from the first side surface (20) as compared to an entire surface of the first side surface (20) except for the distal end portion (42), and a sealing device using the same.
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Patent Agency Ranking
公开(公告)号：US20190358701A1
公开(公告)日：2019-11-28
申请号：US16090123
申请日：2017-11-17
Applicant: TPR CO., LTD. , TPR INDUSTRY CO., LTD.
Inventor： Akira SAYAMA , Koichi HATAKEYAMA , Akira SATO , Kazuki SEINO , Katsuya OKUDA , Tomoki TAKIGUCHI
Abstract: Provided is a cast-iron cylindrical member having projections (P) formed integrally with a casted surface (an outer peripheral surface), and a composite structure including the cast-iron cylindrical member and an outer periphery-side member. The cast-iron cylindrical member satisfies: (A) 0.50 mm>a height (H) of the projections (P)≥0.20 mm; (B) 180≥a total number (N) of the projections (P) per cm2 of the outer peripheral surface≥61; (C) the projections (P) include a projection (Pn) having a constricted shape; (D) a ratio (NP) of the projections (Pn) to the projections (P)≥50%; (E) a bonding strength index (S) expressed by: S=H2×N×NP is equal to or larger than 310; and (F1) a bonding strength F(Al) obtained when the outer peripheral surface of the cast-iron cylindrical member is cast-in inserted with an aluminum alloy exceeds a boundary bonding strength (Fb) expressed by: Fb=1.325×H2×N−0.75.
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公开(公告)号：US20190093203A1
公开(公告)日：2019-03-28
申请号：US15521554
申请日：2016-09-05
Applicant: TPR CO., LTD. , TPR INDUSTRY CO., LTD.
Inventor： Koichi HATAKEYAMA , Akira SAYAMA , Akira SATO
CPC classification number: C22C37/10 , C22C37/00 , C22C37/08 , F02F1/00 , F02F1/004 , F16D65/08 , F16D65/10 , F16J10/00
Abstract: Provided is a cylindrical member made of flake graphite cast iron that has practical processability as well as excellent mechanical strength and further is excellent in abrasion resistance and seizing resistance. Specifically, provided is a cylindrical member made of flake graphite cast iron, the flake graphite cast iron including a composition containing, in terms of mass %, 2.85% or more and 3.35% or less of C, 1.95% or more and 2.55% or less of Si, 0.45% or more and 0.8% or less of Mn, 0.03% or more and 0.25% or less of P, 0.15% or less of S, 0.15% or more and 0.55% or less of Cr, 0.15% or more and 0.65% or less of Mo, 0.15% or more and 0.65% or less of Ni, and the balance of Fe and inevitable impurities.
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公开(公告)号：US09845873B2
公开(公告)日：2017-12-19
申请号：US15266232
申请日：2016-09-15
Applicant: TPR CO., LTD.
Inventor： Noriaki Ayuzawa , Atsushi Nakazawa , Masahide Hama , Toshiyuki Shibuya
Abstract: A combination oil ring includes a pair of upper and lower side rails and a spacer expander arranged there between, the spacer expander including a plurality of upper pieces and lower pieces alternately arranged in a circumferential direction with the pieces axially and circumferentially apart from each other, a coupling piece coupling pieces adjacent to each other, and flange portions formed standing at inner circumferential-side end portions of the upper pieces and the lower pieces so as to press the side rails, and a through hole being formed in the flange portions, wherein side rail support portions that project axially are formed at portions in the circumferential direction of outer circumferential-side end portions of the upper pieces and the lower pieces.
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公开(公告)号：US20150137457A1
公开(公告)日：2015-05-21
申请号：US14610006
申请日：2015-01-30
Applicant: TPR CO., LTD.
Inventor： Takatsugu IWASHITA , Tomoyuki SATO
IPC: F16J9/26
CPC classification number: F16J9/26 , C23C14/0605 , C23C14/16 , C23C28/044 , C23C28/44
Abstract: A piston ring which is provided with a carbon-based coating which has a low friction property and wear resistance, that is, a piston ring which has a carbon-based coating formed over its sliding surface, in which piston ring, the coating is a multilayer coating comprised of two types of layers having different hardnesses laminated in at least two layers, a hardness difference between the two types of layers is 500 to 1700 HV, a high hardness layer has the same or greater thickness than a low hardness layer, and the coating as a whole has a thickness of 5.0 μm or more. The high hardness layer has a thickness of 5 to 90 nm. The surface on which the coating is formed has a base material roughness of 1.0 μmRz or less.
Abstract translation: 一种具有低摩擦性和耐磨性的碳基涂层的活塞环，即在其滑动面上形成有碳基涂层的活塞环，其中活塞环，涂层为 由具有不同硬度的两种类型的层压至少两层的多层涂层，两种类型的层之间的硬度差为500至1700HV，高硬度层具有与低硬度层相同或更大的厚度，以及 涂层整体的厚度为5.0μm以上。 高硬度层的厚度为5〜90nm。 形成涂层的表面的基材粗糙度为1.0μmRz以下。
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公开(公告)号：US20250116331A1
公开(公告)日：2025-04-10
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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