Expander nut having three surfaces of different inclination
United States Patent 2783673
US Patent References:
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/0900462.html
- - 0900462

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Inventors:
Lewis, Warren J.
Huston, Elmo F.
Publication Date:
03/05/1957
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Assignee:
OHIO BRASS CO
Primary Class:
411/53
Other Classes:
405/259.300
International Classes:
E21D21/00
US Patent References:
2667099Expansion anchor spring biased apart at entering end