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315 条记录 (耗时 0.023 秒)

    SLIDING MEMBER
    1.
    发明公开
    SLIDING MEMBER 审中-公开

    公开(公告)号：EP4438862A1

    公开(公告)日：2024-10-02

    申请号：EP22922060.3

    申请日：2022-11-18

    申请人： Kabushiki Kaisha Riken

    发明人： MIYAHARA, Hiroyuki ,  KONDO, Masashi ,  MARUYAMA, Noriyoshi ,  TAKAHASHI, Ikurou

    IPC分类号： F01L1/14

    CPC分类号： F01L1/14

    摘要： A sliding member according to the present invention is used in presence of lubricant oil, and includes a sliding surface made of a base material, and a recessed portion provided in the sliding surface, wherein the sliding surface satisfies a condition expressed by following Equation. 2≤α/Ra≤100
    In Equation, α represents a ratio of a total volume of the recessed portion on the sliding surface to an area of a portion of the sliding surface in which the recessed portion is not formed, and Ra represents a center line average roughness of the sliding surface in the portion in which the recessed portion is not formed.

    PISTON RING AND PISTON RING SET
    2.
    发明公开
    PISTON RING AND PISTON RING SET 审中-实审

    公开(公告)号：EP4435298A1

    公开(公告)日：2024-09-25

    申请号：EP22915831.6

    申请日：2022-12-20

    申请人： Kabushiki Kaisha Riken

    发明人： YAMADA, Takeshi

    IPC分类号： F16J9/20 ,  F02F5/00 ,  F16J9/06

    CPC分类号： F02F5/00 ,  F16J9/06 ,  F16J9/20

    摘要： A piston ring includes an annular main body portion having an inner peripheral surface, an outer peripheral surface, and one side surface and the other side surface substantially orthogonal to the inner peripheral surface. The piston ring includes a first curved surface provided on a side of the one side surface of the outer peripheral surface, the first curved surface being convexly curved outwards in a radial direction of the main body portion, a second curved surface provided on a side of the other side surface of the outer peripheral surface, the second curved surface being convexly curved outwards in the radial direction of the main body portion, and an intermediate surface formed to extend in a direction connecting the one side surface to the other side surface connecting the first curved surface to the second curved surface. The intermediate surface has a flat portion formed in at least a part thereof. The width of the intermediate surface in the direction connecting the one side surface to the other side surface is 0.05 mm or more and 0.30 mm or less.

    SIDE RAIL
    10.
    发明公开
    SIDE RAIL 审中-公开

    公开(公告)号：EP3677764A1

    公开(公告)日：2020-07-08

    申请号：EP18865205.1

    申请日：2018-09-25

    申请人： Kabushiki Kaisha Riken

    发明人： IWATA, Yasuhiro ,  SHIMIZU, Hiroshi ,  TAKEZAWA, Yuichiro

    IPC分类号： F02F5/00 ,  F16J9/20

    摘要： Provided is a side rail 1 having an outer peripheral surface 14 facing radially outward, an inner peripheral surface 13 facing radially inward, a first axial side surface 11 facing one side in an axial direction, and a second axial side surface 12 facing the other side in the axial direction and parallel to the first axial side surface 11, in which, a beveled portion 30 is provided between the outer peripheral surface 14 and the second axial side surface 12, the beveled portion 30 is formed in a tapered surface having a diameter gradually decreasing from a position on the outer peripheral surface 14 at 0.05 mm or more away from the first axial side surface toward the second axial side surface in the axial direction; a tapered surface 30a is provided between a first tapered surface portion 30a1 with an angle of 10° or more to the axial direction and a second tapered surface portion 30a2 provided between the first tapered surface portion 30a1 and the outer peripheral surface 14 and having a smaller angle of inclination to the axial direction than that of the first tapered surface portion.