发明名称 |
PROGRESSIVE DUAL-SHIFT DRILL HEAD AND SYSTEMS AND METHODS THEREOF |
摘要 |
<p>Implementations of the present invention relate to system and apparatus for increasing and lowering speed and torque transferred to a drive shaft from a drive source. In particular, the present disclosure relates to a system that allows engagement and disengagement of low and high gears with a single shifter that can move in a single direction to shift between gears.</p> |
申请公布号 |
WO2013106207(A1) |
申请公布日期 |
2013.07.18 |
申请号 |
WO2012US72106 |
申请日期 |
2012.12.28 |
申请人 |
LONGYEAR TM, INC. |
发明人 |
ARGENT, JASON, DOMINIC;RITTER, DAVID, R. |
分类号 |
E21B4/16;E21B4/20 |
主分类号 |
E21B4/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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