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公开(公告)号：US20250109722A1
公开(公告)日：2025-04-03
申请号：US18851051
申请日：2023-02-07
Applicant: TPR Co., Ltd.
Inventor： Hiroyuki Nagakura , Shuichi Inamori , Kiyoyuki Kawai
Abstract: A piston unit adapted to reciprocate in a cylinder includes a piston and a top land member attached to the piston. The piston includes a first portion including a piston end at one end surface side and fitted with the top land member. The first portion has a smaller outer diameter than a second portion such that there is a step therebetween. The second portion is the other portion of the piston than the first portion. The top land member has a groove wall forming surface opposed to a step surface that connects the outer circumferential surface of the first portion and the outer circumferential surface of the second portion. The first ring groove is defined by the groove wall forming surface, the step surface, and the outer circumferential surface of the first portion.
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公开(公告)号：US12092222B2
公开(公告)日：2024-09-17
申请号：US18697119
申请日：2022-06-20
Applicant: TPR Co., Ltd.
Inventor： Akira Hikone , Kiyoyuki Kawai
IPC: F16J9/20
CPC classification number: F16J9/20
Abstract: A combination of piston rings assembled to a piston of an internal combustion engine includes four compression rings. An outer peripheral surface of a first compression ring includes a barrel surface, an outer peripheral surface of a second compression ring includes an outer peripheral end portion and a taper surface, an outer peripheral surface of a third compression ring includes an outer peripheral end portion and a taper surface, and an outer peripheral surface of a fourth compression ring includes an outer peripheral end portion and a taper surface.
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公开(公告)号：US12000491B2
公开(公告)日：2024-06-04
申请号：US18026144
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)≥3.1 mm.
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公开(公告)号：US20240141993A1
公开(公告)日：2024-05-02
申请号：US18548166
申请日：2022-03-08
Applicant: TPR CO., LTD.
Inventor： Akira HIKONE , Takashi OGURO , Noriaki AYUZAWA , Toshihiro YAMAOKA , Naoki UMEDA
Abstract: An oil control ring comprises: an oil ring having a pair of land parts arranged in a sliding direction and connected to each other by a web part; and a coil expander that biases the oil ring toward the outer circumferential side in the radial direction. The web part of the oil ring is provided with a plurality of window holes. In the axial cross-sectional view of the largest opening portion of the window hole in the axial direction of the oil ring, a width H1 in the sliding direction of the oil ring and a length L1 of a combustion chamber-side non-window hole part, which excludes the window hole, in the outer circumferential surface of the web part, satisfy the condition of 0.15>L1/H1≥0.
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公开(公告)号：US20230416903A1
公开(公告)日：2023-12-28
申请号：US18035779
申请日：2021-08-06
Applicant: TPR Co., Ltd.
Inventor： Syun Sugawara , Takatsugu Iwashita
CPC classification number: C23C14/0641 , F16J9/26 , C23C14/32
Abstract: The present invention addresses the problem of providing a CrN coating film which has excellent peeling resistance such that peeling thereof starting at a crack is unlikely to occur even in a more severe lubrication environment. The problem is solved by a CrN coating film which has a preferred orientation of 200 as determined by XRD, and in which the X-ray diffraction intensity ratio of the (200) plane with respect to the (111) plane, (200)/(111), is 5.5 or higher, and the ratio of crystal grains of 1 μm or smaller is 85% or higher in a crystal grain size distribution measured by an EBSD analysis.
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Patent Agency Ranking
公开(公告)号：US20230415283A1
公开(公告)日：2023-12-28
申请号：US18276081
申请日：2021-02-12
Applicant: TPR CO., LTD.
Inventor： Keisuke Ito , Seiji Miyazaki
CPC classification number: B23P19/088 , B25B27/12
Abstract: A retaining unit that retains a stack body in which piston rings are stacked in an axial direction, a cutting-out unit that delivers a piston ring at the tip end of the stack body from the stack body, and a detecting unit that detects a boundary between the piston rings that are adjacent to each other in the stack body are included, and the cutting-out unit includes a moving unit that moves a pushing-out unit and a restricting unit, and after inserting the pushing-out unit and the restricting unit into a dividing portion that is a boundary between the piston ring at the tip end and a piston ring that is adjacent to the piston ring at the tip end in the stack body, in a state in which movement of the piston ring that is adjacent to the piston ring at the tip end in a delivering direction in which the piston ring at the tip end is delivered is restricted by the restricting unit, the moving unit moves the pushing-out unit in the delivering direction, so that the piston ring at the tip end is separated from the stack body, and the piston ring at the tip end is delivered along the retaining unit.
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公开(公告)号：US20230392688A1
公开(公告)日：2023-12-07
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：US20230372999A1
公开(公告)日：2023-11-23
申请号：US18363342
申请日：2023-08-01
Applicant: TPR CO., LTD. , TPR INDUSTRY CO., LTD.
Inventor： Hideki AIZAWA , Atsushi IGARASHI
CPC classification number: B22D13/105 , B22D13/12
Abstract: A cooling device (21) includes radiation thermometers (51 to 55), a plurality of nozzle parts, a plurality of electromagnetic valves (V1 to V5), and a control device (60). The radiation thermometers detect pre-cooling temperatures that are temperatures at a plurality of places on the mold before cooling water is sprayed from the plurality of nozzle parts to the mold. The control device individually sets a cooling time to each of the plurality of places on the mold based on a deviation between the pre-cooling temperature at the place on the mold and a target temperature and controls the electromagnetic valves based on the cooling times individually set to the plurality of respective places on the mold.
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公开(公告)号：US20220056949A1
公开(公告)日：2022-02-24
申请号：US17416283
申请日：2019-12-13
Applicant: TPR CO., LTD.
Inventor： Masaki IKEDA , Shuichirou HAMANAKA
Abstract: A thrust washer is provided with a ring-shaped portion that surrounds an insertion hole, the thrust washer is provided with a sliding surface and an oil groove configured to allow lubricating oil to flow in, the oil groove is provided with an opening portion configured to allow the lubricating oil to flow in from the insertion hole side in an inner peripheral end side, an outer periphery end side of the ring-shaped portion of at least one of the oil groove is provided with an oil stop wall which is configured to suppress flow of the lubricating oil toward an outer periphery side of the ring-shaped portion, and a sliding area ratio of each of the sliding surfaces to a projection plane in plan view of the ring-shaped portion is provided within a range of from 60% to 85%
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公开(公告)号：US11223048B2
公开(公告)日：2022-01-11
申请号：US16970264
申请日：2019-10-31
Applicant: TPR CO., LTD. , iElectrolyte CO., LTD.
Inventor： Kazunari Soeda , Takuya Takahashi
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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