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. 22, 2000
Filed:
Dec. 23, 1998
Applicant:
Inventor:
Yoshiaki Kaburagi, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
320135 ;
Abstract
In a battery-driven system comprising an electronic apparatus as a main unit and a power supply unit which incorporates a battery (cells) and supplies source power for working the main unit, the present invention intends to achieve more efficient use of the battery. A discharge switch for turning on/off an output of the battery supplied to the side of the main unit is incorporated in the power supply unit. In response to turn-on of a switch provided on the main unit side or a signal from an MPU (control unit) on the main unit side, supply of the source power from the power supply unit to the main unit is controlled to turn on/off.