发明名称 |
MULTI-PIECE OIL RING |
摘要 |
A multi-piece oil ring includes an oil ring main member in which two rails are connected together by a columnar part and which has a roughly I-shaped cross section; and a coil expander disposed in an inner circumferential groove formed on the inner circumferential surface of the columnar. Each rail in the oil ring main member possesses a sliding section protuberance whose tip possesses a jutting portion. The axial length of the jutting portion is 0.02-0.18 mm. The change rate of the axial length of the individual jutting portion is in the range of 0 to 80% at least in a region of from its sliding surface to be faced to a cylinder, which is positioned at the tip of the jutting portion, to a position of 0.03 mm away from the aforementioned sliding surface in the radial direction of the oil ring main member.
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申请公布号 |
US2012261886(A1) |
申请公布日期 |
2012.10.18 |
申请号 |
US201013497417 |
申请日期 |
2010.03.26 |
申请人 |
CHIBA ATSUSHI;FUJIMURA KAZUHIRO;HIRAISHI IWAO;KAJIWARA MAKOTO;NIPPON PISTON RING CO., LTD. |
发明人 |
CHIBA ATSUSHI;FUJIMURA KAZUHIRO;HIRAISHI IWAO;KAJIWARA MAKOTO |
分类号 |
F16J9/06;F02F5/00;F16J9/26 |
主分类号 |
F16J9/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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