发明名称 Method Of Making Direct Tension Indicating Washers
摘要 A method of making a direct tension indicating washer including: forming a first surface having a discrete protuberance formed thereon; forming a second surface having a discrete indentation formed opposite the protuberance; and positioning an indicating material in the indentation, wherein the indicating material has a cured skin on an outside of the indicating material and a liquid core in an interior of the indicating material.
申请公布号 US2011014986(A1) 申请公布日期 2011.01.20
申请号 US20100891021 申请日期 2010.09.27
申请人 WALLACE IVAN WAYNE 发明人 WALLACE IVAN WAYNE
分类号 B21D53/20 主分类号 B21D53/20
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