Methods of attaching a shank to a body of an earth-boring tool including a load-bearing joint and tools formed by such methods
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United States of America Patent
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Apr 27, 2010
Grant Date -
Dec 10, 2009
app pub date -
Jun 4, 2008
filing date -
Jun 4, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
Earth-boring rotary drill bits including a bit body attached to a shank assembly at a joint. In some embodiments, the joint may be configured to carry at least a portion of any tensile longitudinal and rotational load applied to the drill bit by mechanical interference at the joint. In additional embodiments, the joint may be configured to carry a selected portion of any tensile longitudinal load applied to the drill bit. Methods for attaching a shank assembly to a bit body of an earth-boring rotary drill bit include configuring a joint to carry at least a portion of any tensile longitudinal and rotational load applied to the drill bit by mechanical interference. Additional embodiments include configuring a joint to carry a selected portion of any tensile longitudinal load applied to the drill bit by mechanical interference.
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