Impact Wrench and Method for Operating an Impact Wrench
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United States of America Patent
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Apr 27, 2015
filing date -
Jul 4, 2014
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Abstract
An impact wrench and a method for operating an impact wrench are disclosed. In an embodiment, an impact wrench includes a housing, a motor-driven input shaft, an output shaft for mounting a tool and a hammer mechanism for transmitting a torque and coupling the input shaft to the output shaft, wherein a first bearing torque, which acts against a rotational direction of the output shaft, is present between the output shaft and the housing, wherein a second bearing torque, which acts against a rotational direction of the input shaft, is present between the output shaft and the input shaft when the input shaft is not coupled to the output shaft by the hammer mechanism, and wherein an absolute value of the first bearing torque is smaller than an absolute value of the second bearing torque.
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