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. 15, 2011
Filed:
Oct. 31, 2006
Masami Kondou, Chikugo, JP;
Masami Kondou, Chikugo, JP;
Yanmar Co., Ltd., Osaka, JP;
Abstract
A hydraulic shovel including a selection means for an engine which is capable of arbitrarily selecting either of an isochronous control and a droop control, and a traveling detection means for detecting the traveling state of a traveling device. The hydraulic shovel further includes a control means for the engine which selects the isochronous control when the traveling detection means detects the traveling state to maintain the rotational speed of the engine during rated operation while an output is increased, and selects the droop control when the traveling detection means does not detect the traveling state to set the rotational speed of the engine lower than that during the rated operation while the output is increased.