Impact Wrench
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United States of America Patent
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N/A
Issued Date -
Jan 7, 2010
app pub date -
Jun 16, 2009
filing date -
Jul 1, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to an impact wrench having a drive motor for driving a drive shaft (10) and an output shaft (38) that can be coupled to a tool holder, and having an impact mechanism, the impact mechanism comprising an anvil (36) that has first impact cheeks (34) and that is coupled to the output shaft (38), and comprising a hammer, which is guided on the drive shaft (10), the hammer having second impact cheeks (24), which engage with the first impact cheeks (34) for the purpose of rotary transmission, wherein the hammer comprises a rotating mass (22) and a control part (20), the control part (20) carrying the second impact cheeks (24) and rotating with the drive shaft (10) in the case of non-impact and, in the case of impact, executing an axial and, preferably, additional, rotational oscillation relative to the drive shaft (10), the control part (20) transmitting the rotation of the drive shaft (10) to the rotating mass (22) and being movably guided in the axial direction in the rotating mass (22) for the purpose of realizing the impact function, and the rotating mass (22) not executing any axial movement.
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