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:
Aug. 27, 2019
Filed:
Jul. 10, 2014
Applicant:
Hitachi Koki Co., Ltd., Tokyo, JP;
Inventors:
Kenichirou Yoshida, Ibaraki, JP;
Akira Onose, Ibaraki, JP;
Shinji Kuragano, Ibaraki, JP;
Takuya Konnai, Ibaraki, JP;
Assignee:
KOKI HOLDINGS CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B25F 5/00 (2006.01); B23Q 15/00 (2006.01); B23D 45/16 (2006.01); B23D 59/00 (2006.01); B27B 9/00 (2006.01); B23D 47/12 (2006.01); B24B 23/02 (2006.01);
U.S. Cl.
CPC ...
B23Q 15/00 (2013.01); B23D 45/16 (2013.01); B23D 47/12 (2013.01); B23D 59/001 (2013.01); B24B 23/028 (2013.01); B25F 5/00 (2013.01); B27B 9/00 (2013.01);
Abstract
There is provided an electric power tool having a plurality of operation modes with different rotation speeds at least in a predetermined load range. The electric power tool is capable of switching between the operation modes when a predetermined condition is satisfied even during a motor is driven, and configured such that a rotation speed of the motor is changed smoothly or in a stepwise manner at the switching between the operation modes.