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.