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:
Sep. 30, 2025
Filed:
Sep. 01, 2023
Black & Decker Inc., New Britain, CT (US);
John D. Cox, Lutherville, MD (US);
Michael K. Forster, White Hall, MD (US);
John C. Vanko, Timonium, MD (US);
Daniel J. White, Baldwin, MD (US);
Bhanuprasad V. Gorti, Perry Hall, MD (US);
Matthew J. Velderman, Baltimore, MD (US);
Andrew E. Seman, Jr., Pylesville, MD (US);
BLACK & DECKER INC., New Britain, CT (US);
Abstract
A power tool is provided including a power supply interface receiving a removable battery pack, a brushless direct current (BLDC) motor including a rotor and a stator, and a multi-phase inverter bridge circuit. A controller is provided to output drive signals to the inverter bridge circuit to control flow of current from to the motor, where each drive signal is activated within each corresponding phase of the motor within a conduction band. The controller is configured to control a length of the conduction band at a variable value within a first torque range below a torque threshold and at a substantially constant value within a second torque range above the torque threshold. The torque threshold is greater than approximately 1 Newton-meters and the motor produces a maximum power output of at least approximately 1250 watts at the torque of approximately 1 Newton-meters.