公开(公告)号：US20240123594A1

公开(公告)日：2024-04-18

申请号：US18379900

申请日：2023-10-13

Applicant: MAKITA CORPORATION

Inventor： Yuki HAYASHI ,  Itsuku KATO

IPC: B25F5/00 ,  H02P6/08

CPC classification number: B25F5/001 ,  H02P6/08

Abstract: One aspect of the present disclosure provides an electric power tool including a motor, a drive circuit, a voltage detector, a first calculator, and a second calculator. The drive circuit applies a power-supply voltage to the motor in accordance with a first duty ratio. The voltage detector detects a magnitude of the power-supply voltage. The first calculator calculates a desired duty ratio based on the magnitude of the power-supply voltage detected. The second calculator increases the first duty ratio from an initial value to the desired duty ratio in accordance with a lapse of time. The second calculator varies a rate of increase of the first duty ratio based on the magnitude of the power-supply voltage detected.

公开(公告)号：US20250012401A1

公开(公告)日：2025-01-09

申请号：US18751640

申请日：2024-06-24

Applicant: MAKITA CORPORATION

Inventor： Yuki HAYASHI

IPC: F16N3/12 ,  F16N13/06

Abstract: One aspect of the present disclosure provides an electric-powered lubricator including a first manual switch, an electric motor, a drive circuit, a pump, and a control circuit. The control circuit controls, while the electric motor is being driven, the drive circuit such that the electric motor decelerates from a preset rotational speed in accordance with a difference between (i) a setting value and (ii) a calculated value. The setting value corresponds to a desired count of reciprocation of a plunger in the pump. The calculated value corresponds to a calculated count of reciprocation of the plunger.