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:
Nov. 18, 2025
Filed:
Jun. 06, 2023
Makita Corporation, Anjo, JP;
Mitsuo Suenaga, Anjo, JP;
Keita Mizukoshi, Anjo, JP;
MAKITA CORPORATION, Anjo, JP;
Abstract
A brushless motor () includes: a rotor (), which rotates about a rotational axis (AX); and a stator (), which is disposed around the rotor and comprises one or more coils (). The rotor comprises a rotor core () and a rotor shaft (), which is disposed in a shaft hole () of the rotor core. The rotor shaft includes: a thinner-diameter force-fitting segment (), which is force-fit into the shaft hole with a first amount of force-fitting interference; and a thicker-diameter force-fitting segment (), which is disposed at a location different from that of the thinner-diameter force-fitting segment in a front-rear direction parallel to the rotational axis and which is force-fit into the shaft hole with a second amount of force-fitting interference that is larger than the first amount of force-fitting interference.