The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 02, 2026
Filed:
Dec. 03, 2024
Milwaukee Electric Tool Corporation, Brookfield, WI (US);
Matthew R. Bailey, Racine, WI (US);
Will Didier, Cedarburg, WI (US);
Jeffrey C. Hessenberger, Neosho, WI (US);
MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US);
Abstract
A power tool includes an electric motor having a motor shaft and a fan assembly attachable to the motor shaft for rotation in a first rotational direction to generate an airflow for cooling the electric motor. The fan assembly includes a fan body, a bearing that rotates with the fan body, and a flywheel having a central portion that defines a central bore configured to receive the bearing so that the bearing is rotatably affixed to the flywheel. The power tool further includes a spring configured to receive torque from the electric motor such that the torque winds the spring to store energy when the electric motor is activated and release the energy to supply torque to the fan assembly so that the fan assembly continues to rotate and generate the airflow for cooling the electric motor when the electric motor is deactivated.