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. 17, 2009
Filed:
Jul. 04, 2005
Jun Morinaga, Hiratsuka, JP;
Hiroaki Inoue, Hiratsuka, JP;
Jun Morinaga, Hiratsuka, JP;
Hiroaki Inoue, Hiratsuka, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A control deviceof an electric rotary excavator generates a rotation speed coefficient in accordance with a setting condition of a fuel dialand a selection condition of a mode selection switchand changes a value of a target speed command value based on the rotation speed coefficient to change a rotation speed of a rotary bodyAccordingly, when the engine speed becomes low through operation of the fuel dialor the mode selection switch, the rotation speed of the rotary bodycan be decreased accordingly, while when the engine speed becomes high, the rotation speed can be increased accordingly. Therefore, the operation feeling substantially similar to a conventional arrangement for hydraulically rotating the rotary bodycan be obtained, so that the operator is not confused when the operator shifts excavators from the conventional hydraulic excavator to the electric rotary excavator.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile