Invention Grant
- Patent Title: Electric motor for a power tool
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Application No.: US16866355Application Date: 2020-05-04
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Publication No.: US11411467B2Publication Date: 2022-08-09
- Inventor: Jeffrey C. Hessenberger , Michael Kolden , Andrew T. Beyerl
- Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION
- Applicant Address: US WI Brookfield
- Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
- Current Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
- Current Assignee Address: US WI Brookfield
- Agency: Michael Best & Friedrich LLP
- Main IPC: B25F5/00
- IPC: B25F5/00 ; H02K7/14 ; H02K7/04 ; H02K9/06

Abstract:
A power tool includes a housing, a battery connection portion supported by the housing, a drive mechanism configured to operate a working element, and a brushless DC motor positioned within the housing and connected to the drive mechanism. The motor includes a rotor, stator surrounding the motor, and an output shaft fixed to the rotor such that movement of the rotor is transmitted to the output shaft. The motor also includes a fan coupled to the output shaft to rotate with the output shaft and the rotor, and a brass bushing fixed to the output shaft to rotate with the rotor and the output shaft relative to the stator. The bushing includes a balancing feature.
Public/Granted literature
- US20200266684A1 ELECTRIC MOTOR FOR A POWER TOOL Public/Granted day:2020-08-20
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