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    Piston ring
    1.
    发明授权
    Piston ring 有权

    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.

    Compression ring
    2.
    发明授权
    Compression ring 有权

    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

    Piston Ring
    5.
    发明申请
    Piston Ring 有权

    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.

    Piston ring combination, and internal combustion engine
    6.
    发明授权
    Piston ring combination, and internal combustion engine 有权

    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.

    Oil control ring
    8.
    发明授权
    Oil control ring 有权

    公开(公告)号：US12173799B2

    公开(公告)日：2024-12-24

    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

    IPC: F16J9/20 ,  F16J9/06

    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.

    Piston Ring Combination, and Internal Combustion Engine
    9.
    发明公开
    Piston Ring Combination, and Internal Combustion Engine 审中-公开

    公开(公告)号：US20240263700A1

    公开(公告)日：2024-08-08

    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.

    Compression Ring
    10.
    发明公开
    Compression Ring 审中-公开

    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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