发明名称 POWER TOOL
摘要 An oil pulse tool including: a brushless motor which includes stator windings; a drive circuit configured to apply a driving voltage to any of the stator windings of the brushless motor at a predetermined timing; an oil pulse mechanism portion configured to be rotary driven by the brushless motor; and an output shaft which is connected to the oil pulse mechanism portion, wherein the drive circuit changes an advance angle of the driving voltage in accordance with a rotational position of the oil pulse mechanism portion.
申请公布号 US2012073846(A1) 申请公布日期 2012.03.29
申请号 US201113235323 申请日期 2011.09.16
申请人 HIRAI SHOUICHI;IWATA KAZUTAKA;HITACHI KOKI CO., LTD., 发明人 HIRAI SHOUICHI;IWATA KAZUTAKA
分类号 B25B21/02;B25D11/06 主分类号 B25B21/02
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