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:
Mar. 13, 2001
Filed:
May. 28, 1999
Masayuki Kagoshima, Kobe, JP;
Hideki Kinugawa, Hiroshima, JP;
Kabushiki Kaisha Kobe Seiko Sho, Kobe, JP;
Abstract
It is intended to keep low the moment of inertia of a boom, etc. and maintain the whole of a working machine in good weight balance. At the same time, a highly efficient recovery of energy is to be attained to increase a continuous working time of a battery. A battery-powered working machine using a battery as a power source is provided. Rotation of a rotatable superstructure,and rising and falling motions of a boom,are performed directly by electric motors,and,. The recovery of energy is attained by utilizing the electric motors,and,. An arm,and a bucket,both located remote from a centroid position of the machine are actuated by an arm cylinder,and a bucket cylinder,, which are hydraulic actuators less heavy than electric motors. Further, a hydraulic pump,for supplying those hydraulic actuators with a hydraulic oil is actuated by a hydraulic pump actuating electric motor,which utilizes the battery,as a power source.