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

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

IPC: B24B33/02 ,  F02F1/00 ,  C22C33/08 ,  C22C37/00 ,  F02F1/20

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.

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