发明名称 |
OIL RING, METHOD OF PRODUCING THE SAME, AND PISTON STRUCTURE USING THE OIL RING |
摘要 |
<p>An oil ring 1 comprises an annular oil ring body 10 having a pair of rail portions 12 at its axially upper and lower portions and butt ends, and a coil expander 20 assembled in the inner periphery of the oil ring body 10. The cross-sectional profile taken in the radial direction of the outer peripheral sliding surface (f) of the pair of rail portions 12 has a nearly straight region (f1) with a length of equal to or more than 0.05 mm in the center and curved regions (f2) formed on both sides of the straight region (f1).</p> |
申请公布号 |
EP1617066(A1) |
申请公布日期 |
2006.01.18 |
申请号 |
EP20040728418 |
申请日期 |
2004.04.20 |
申请人 |
KABUSHIKI KAISHA RIKEN |
发明人 |
YAMADA, MASAKI;ITO, KUNIYASU;KAWASAKI, MASAMI;ABE, TOMOAKI;UCHIYAMA, SHIGENOBU |
分类号 |
F02F5/00;F16J9/06;(IPC1-7):F02F5/00 |
主分类号 |
F02F5/00 |
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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