发明授权
- 专利标题： Method of and apparatus for making a sheet metal zig-zag key
- 专利标题（中）： 制造钣金锯齿形键的方法和设备
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申请号： US770485申请日： 1977-02-22
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公开(公告)号： US4103570A公开(公告)日： 1978-08-01
- 发明人: Jacob Rabinow
- 申请人： Jacob Rabinow
- 申请人地址： MD Potomac
- 专利权人： Hall & Myers
- 当前专利权人： Hall & Myers
- 当前专利权人地址： MD Potomac
- 主分类号： B21D53/42
- IPC分类号： B21D53/42 ; B21F1/04
摘要：
This invention describes a method of making a sheet metal zig-zag key for a lock. The technique of making a zig-zag key, either as a duplicate of another or in the original form, consists of passing a heavy current through the key so as to get it into a plastic state such as, for example, a red heat, and then deforming it into the desired shape.
公开/授权文献
- US5779474A Sudden stop mechanism and air-gap seal for dental handpiece 公开/授权日：1998-07-14
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