公开(公告)号：US20200096001A1

公开(公告)日：2020-03-26

申请号：US16574664

申请日：2019-09-18

Applicant: TECHTRONIC CORDLESS GP

Inventor： Koon For Chung

IPC: F04D25/06 ,  F04D29/26 ,  A01G20/47

Abstract: An electric blower (10) is disclosed as including a brushless motor (16), and an axial fan (18, 18C) driven by the motor, the motor being operable at a first speed of rotation of 15,000 revolutions per minute (rpm) and a second speed of rotation of 18,000 rpm, the axial fan including a hub (34C) and a plurality of fan blades (36C) engaged with the hub, the hub having a hub diameter (ϕH), the axial fan having an outer diameter (ϕT), and φ H φ T being between substantially 0.6 and substantially 0.65.

公开(公告)号：US12296424B2

公开(公告)日：2025-05-13

申请号：US17679186

申请日：2022-02-24

Applicant: TECHTRONIC CORDLESS GP

Inventor： Koon For Chung ,  Yan Jia Wang

IPC: B23Q15/20 ,  A01G3/00 ,  B02C25/00 ,  B27L11/02

Abstract: Disclosed in the present invention is a control system for a normally-on power tool. The power tool comprises a tool head and a power device for providing the tool head with power, and the control system comprises an acquisition circuit and a control circuit. The acquisition circuit is in electrical communication with the power device and used to acquire at least one parameter associated with the power device, and the control circuit is configured to put the power device in a working mode with a first output power or a standby mode with a second output power according to the at least one parameter. The control system according to one or more embodiments of the present invention can save energy consumption, reduce mechanical wear, increase the service life of the power tool, and enhance operation convenience and safety.

公开(公告)号：US20220078978A1

公开(公告)日：2022-03-17

申请号：US17537338

申请日：2021-11-29

Applicant: Techtronic Cordless GP

Inventor： Koon For Chung ,  Danny Wang ,  Tim Xie ,  Todd Rickey

IPC: A01G3/053 ,  H02K11/33 ,  F16H3/66 ,  H02K7/108 ,  H02K7/116 ,  H02K7/14

Abstract: A hedge trimmer, comprising: a drive motor disposed in a casing; a gear mechanism disposed in the casing and connected to the drive motor; and a blade arrangement having at least one cutter bar. The at least one cutter bar is driven in a reciprocating manner in a longitudinal direction of the blade arrangement by the drive motor via the gear mechanism. The gear mechanism contains at least a first gear setting and a second gear setting producing two different gear-ratios, such that the at least one cutter bar is adapted to be driven at a first speed and torque using the first gear setting, and a second speed and torque different from the first speed using the second gear setting. By providing two different trimming output modes, the hedge trimmer may provide either a high-speed/small-torque trimming capability or a low-speed/large-torque trimming capability to accommodate requirements under different operation circumstances.