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. 14, 1995
Filed:
Aug. 04, 1993
Applicant:
Inventors:
Toshio Matsumoto, Anjo, JP;
Hideki Watanabe, Anjo, JP;
Assignee:
Makita Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ; H01M / ;
U.S. Cl.
CPC ...
320 20 ; 320 31 ;
Abstract
A battery charger includes a circuit for detecting battery voltage (V1) appeared when a predetermined time (T1) has elapsed after starting a charging operation. The determination as to whether the battery has been fully charged is performed after the battery voltage has reached the sum of a predetermined potential difference (dVS) and the battery voltage (V1).