Breakable rock bolt
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United States of America Patent
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May 7, 2013
Grant Date -
Feb 4, 2010
app pub date -
Oct 11, 2007
filing date -
Oct 19, 2006
priority date (Note) -
Expired
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Abstract
A rock bolt is disclosed, which includes first and second ends, a shaft extending between the ends, the shaft incorporating a hollow metal rod including at least one breaking zone and wherein the shaft is arranged to preferentially break in the breaking zone when impact loading is applied to the shaft.
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