发明名称 |
Helical conical spring lock-washer and method of formation thereof |
摘要 |
A helical conical spring lock-washer includes a lock-washer body having formed on one surface thereof a plurality of triangular pyramid-shaped depressions. Each of the depressions provides a triangular opening formed on the respective surface of the lock-washer body, with the base of the triangular opening positioned adjacent to the outer margin of the lock-washer body and the apex of the triangular opening directed toward the center of the lock-washer body.
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申请公布号 |
US4302136(A) |
申请公布日期 |
1981.11.24 |
申请号 |
US19790105638 |
申请日期 |
1979.12.20 |
申请人 |
ABE, MICHIO;UROKOHARA, TOMIO |
发明人 |
ABE, MICHIO;UROKOHARA, TOMIO |
分类号 |
B21D53/20;F16B39/24;F16B43/00;(IPC1-7):F16B39/24 |
主分类号 |
B21D53/20 |
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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