发明名称 |
Method of making expandable and collapsible mandrel |
摘要 |
An expandible and collapsible mandrel and method of making same are provided wherein such mandrel has a central support and a plurality of longitudinal segments supported for pivoting movements toward and away from the support and the longitudinal segments have circumferentially disposed intermeshing fingers which cooperate to provide a substantially cylindrical supporting outside surface at each of an infinite number of effective diameters and with the supporting surface at each effective diameter being free of longitudinal gaps which extend the full length of the longitudinal segments.
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申请公布号 |
US4754543(A) |
申请公布日期 |
1988.07.05 |
申请号 |
US19870094942 |
申请日期 |
1987.09.10 |
申请人 |
DAYCO PRODUCTS, INC. |
发明人 |
SPIVY, PAUL L. |
分类号 |
B26D3/16;B26D7/20;B26D7/26;B29C33/48;B65H75/24;(IPC1-7):B23P13/02;B23B31/40 |
主分类号 |
B26D3/16 |
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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