公开(公告)号：US20220123565A1

公开(公告)日：2022-04-21

申请号：US17275504

申请日：2019-09-12

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka ICHIKAWA ,  Akihiro NAKAMOTO ,  Minoru GYODA ,  Hayato KANO ,  Toru YAMADA ,  Hitoshi SUZUKI

IPC: H02J7/00 ,  H02P3/06

Abstract: A battery pack is configured to supply electric power to an electric work machine, such as a power tool or outdoor power equipment. The battery pack includes a first battery-signal terminal and a second battery-signal terminal. The first battery-signal terminal outputs, to the electric work machine, a first signal indicating that discharging is to be prohibited or permitted. The second battery-signal terminal outputs, to the electric work machine, a second signal indicating that discharging is to be prohibited or permitted. Thus, two communication paths are provided for transmitting signals to permit or prohibit discharging of the battery pack.

公开(公告)号：US20170304976A1

公开(公告)日：2017-10-26

申请号：US15478691

申请日：2017-04-04

Applicant: MAKITA CORPORATION

Inventor： Akihiro NAKAMOTO

IPC: B23Q11/00 ,  B25F5/00 ,  B24B23/02 ,  H02P3/06

CPC classification number: B23Q11/0089 ,  B23Q11/0085 ,  B23Q11/0092 ,  B24B23/028 ,  B25F5/00 ,  H02P3/06 ,  H02P3/12 ,  H02P3/18 ,  H02P7/295 ,  H02P25/14 ,  H02P27/04 ,  H02P29/024 ,  H02P29/0241

Abstract: An electric working machine comprises a motor, a switch, a drive device, a brake device, and a failure determiner. The switch is configured for operation by a user, has an on-state and an off-state. The drive device is configured to drive the motor in response to the switch being placed in the on-state. The brake device is configured to control deceleration of the motor to a stopped state in response to the switch being placed in the off-state. The failure determiner is configured to monitor deceleration of the motor during controlled deceleration and to determine whether the brake device has failed based on the monitored deceleration.