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:
May. 08, 2001
Filed:
Mar. 18, 1999
Masahiko Sakoh, Nishikamo-gun, JP;
Masatoshi Sugiura, Anjo, JP;
Yutaka Matsunaga, Yokkaichi, JP;
Tomoo Muramatsu, Nisshin, JP;
Kazuyoshi Horikawa, Tenryu, JP;
Other;
Abstract
A charging system includes an electric power tool (,) and a charger (,) having internal rechargeable batteries (,) and a controller (,) for monitoring the charge/discharge level of the batteries (,). The electric power tool (,) additionally includes a pair of charge terminals (,) for carrying current to charge the batteries (,), a temperature terminal (,) for outputting to the charger (,) data on the temperature of the batteries, and a data terminal (,) for outputting to the charger data on the battery charge/discharge level from the controller (,). The charger (,) includes a pair of charge terminals (,), a temperature terminal (,), and a data terminal (,) that are electrically connected to the corresponding tool terminals when the tool (,) is set on the charger for a charge. The charging system indicates the remaining charge level on an indicator unit (,) based on the received data on the battery charge/discharge level and changes the amount of the charging current based on the data on the battery charge/discharge level and the battery temperature data received from the tool (,).