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Strip resistant screw and rescue driver
专利权人:
David Mokhtee
发明人:
David Mokhtee
申请号:
US14271573
公开号:
US09044843B1
申请日:
2014.05.07
申请国别(地区):
US
年份:
2015
代理人:
摘要:
A screw with a head that includes a flat area with a first indented area located centrally within the head and a second indented area located centrally within the first indented area, and all three areas provided with grooves for engagement with tools. A screw driver having mating ridges that insert within the grooves on the first indented area rotates the screw to insert it into a substrate. A rescue driver engages the grooves of the flat head and second indented area to remove the screw from the substrate when the grooves in the first indented area become stripped. The head of an alternate screw is provided centrally with a reverse threaded female channel engagable by a reverse threaded rescue driver to remove the screw from a substrate when the grooves in the alternate screw's head that are used to insert the screw into a substrate become stripped.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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