公开(公告)号：US10890255B2

公开(公告)日：2021-01-12

申请号：US16611616

申请日：2018-07-30

Applicant: TPR CO., LTD.

Inventor： Seeroku Hoshino ,  Hirofumi Osada ,  Seiji Tamaki

IPC: F16J9/06

Abstract: Under a state in which the combination oil ring is mounted in an oil ring groove before inserted into a cylinder bore, when an inclined surface of an upper ear portion of an expander spacer is held in contact with an inner peripheral surface of an upper segment and an inclined surface of a lower ear portion of the expander spacer is held in contact with an inner peripheral surface of a lower segment, an upper protrusion amount (P1) from an outer peripheral-side end surface of the expander spacer to an outer peripheral surface vertex of the upper segment is larger than a lower protrusion amount (P2) from the outer peripheral-side end surface of the expander spacer to an outer peripheral surface vertex of the lower segment. When the combination oil ring is inserted into the cylinder bore, the sealing performance can be improved to reduce the oil consumption.