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:
Jul. 09, 2019
Filed:
Jan. 21, 2016
Makita Corporation, Anjo-Shi, JP;
Akira Niwa, Anjo, JP;
Kei Kouda, Anjo, JP;
MAKITA CORPORATION, Anjo-Shi, JP;
Abstract
A power tool () includes a brushless motor () having a stator () and a rotor (). The stator () includes: a tubular stator core (); front and rear insulators () fixed to the stator core; and coils (), which are wound around a plurality of teeth () on the stator core. The rotor () includes: a rotor core () disposed within the stator; a rotary shaft () fixed to the rotor core; and one or more permanent magnets () fixed to the rotor core. A sensor-circuit board () detects the position(s) of the permanent magnet(s) and is fixed to the stator. One or more notched parts () is/are formed, in an outer circumference of the sensor-circuit board, between circumferentially-adjacent teeth in an axial direction of the stator. The notch part(s) allow(s) air for cooling the brushless motor to pass more easily through the interior of the stator.