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:
Dec. 11, 2012
Filed:
Oct. 01, 2009
Applicants:
Hitoshi Suzuki, Anjo, JP;
Tadahiko Kobayakawa, Anjo, JP;
Tomoo Muramatsu, Anjo, JP;
Inventors:
Assignee:
Makita Corporation, Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02J 7/04 (2006.01); H02K 7/14 (2006.01); E21B 3/00 (2006.01); F21L 4/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Each of a battery charger and a battery pack has a microcomputer. The respective microcomputers mutually perform data communication while the battery pack is being charged by the battery charger, and confirm an operational state of the microcomputer of the communication counterpart (mutual operation confirmation) based on a result of the data communication. When an abnormality of one of the microcomputers is detected, the other microcomputer executes a predetermined process for stopping charging.