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:
Jan. 17, 2017
Filed:
Aug. 06, 2014
Sumitomo(s.h.i.) Construction Machinery Co., Ltd., Tokyo, JP;
Jitsutaka Takeo, Chiba, JP;
Abstract
A shovel includes: an engine generating a drive power; a generator performing a generating operation using the drive power transmitted from the engine; an electric accumulator having a plurality of electric storage cells in which an electric power generated by the generator is accumulated, the electric accumulator supplying an electric power to an electric load of the shovel; and an equalizing circuit provided to each of the electric storage cells and including a discharge resistor and a switching circuit in order to equalize capacitances of the electric storage cells. A determination is made as to whether to activate the equalizing circuit based on a variation in outputs of the electric storage cells.