| 摘要 |
PCT No. PCT/GB86/00266 Sec. 371 Date Jan. 12, 1987 Sec. 102(e) Date Jan. 12, 1987 PCT Filed May 14, 1986 PCT Pub. No. WO86/06810 PCT Pub. Date Nov. 20, 1986.An oil control ring for a piston in an i.c. engine comprising an expander ring and two lamellar rails which scrape the oil from the cylinder wall. The expander ring has two series of lugs arranged alternately on each side, which support the rails and two series of dimples arranged alternately on each side which space the rails from the expander ring. The expander ring has notches in its outer and inner circumference and is bent into a circular form. Its free ends form a butt joint.
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