Open-faced rod spinning device
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United States of America Patent
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Oct 23, 2012
Grant Date -
Nov 10, 2011
app pub date -
Jul 21, 2011
filing date -
May 12, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
An open-faced rod-spinning device configured for making and/or breaking joints between threaded drill rods. The rod-spinning device may include a drive gear with an open face. The drive gear may also be coupled to a plurality of drive pins. The rod-spinning device may include a carriage assembly including an open face for receiving and rotating about a drill rod. The carriage assembly may include a plurality of gripping lobes configured to be engaged and rotated by the drive pins about pivot pins. The drive gear may be configured to rotate relative to the carriage assembly to cause the drive pins to engage and rotate the gripping lobes.
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