公开(公告)号：US20180272511A1

公开(公告)日：2018-09-27

申请号：US15928788

申请日：2018-03-22

Applicant: MAKITA CORPORATION

Inventor： Masahiko SAKO ,  Takaaki OSADA ,  Hirokatsu YAMAMOTO

IPC: B25B21/02 ,  B25B23/147

CPC classification number: B25B21/02 ,  B25B23/1405 ,  B25B23/1475

Abstract: An impact fastening tool may include a motor; a hammer configured to be rotationally driven by the motor; an anvil configured to he hit in a rotational direction by the hammer; a signal obtainer configured to obtain a variable signal. which varies in accordance with a hit to the anvil by the hammer; and a seating determiner configured to determine whether or not a fastener has been seated based on the variable signal obtained by the signal obtainer, wherein the seating determiner is configured to determine whether or not the fastener has been seated based on a signal component of the variable signal obtained by the signal obtainer, the signal component corresponding to a predetermined reference frequency.