发明名称 |
Wire material for coil expander and coil expander |
摘要 |
A wire material for a coil expander capable of manufacturing a coil expander that is unlikely to cause disadvantages such as abnormal wear and resultant reduction in strength The wire material for a coil expander is used for a coil expander of a combination piston ring having a piston ring and the coil expander for pressing and urging the piston ring outward in the radial direction thereof, wherein a cross-sectional shape thereof is a rectangular shape, and when the coil expander is formed by using the wire material for a coil expander, the surface of the wire material for a coil expander, constituting an outer peripheral surface of the coil expander, is formed into a convex curved shape.
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申请公布号 |
US7954822(B2) |
申请公布日期 |
2011.06.07 |
申请号 |
US20050585477 |
申请日期 |
2005.01.07 |
申请人 |
NIPPON PISTON RING CO., LTD.;TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
MATSUSHIMA NOBUYUKI;SASAO CHIKAKO;SUZUKI TAKAO |
分类号 |
F16J9/00;B60T11/236;F16J9/06 |
主分类号 |
F16J9/00 |
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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