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. 23, 2007
Filed:
Dec. 20, 2004
Koichi Shimomura, Akashi, JP;
Masaaki Ehara, Akashi, JP;
Koichi Shimomura, Akashi, JP;
Masaaki Ehara, Akashi, JP;
Kobelco Cranes Co., Ltd., Tokyo, JP;
Abstract
According to a control device for a hydraulic winch, a regulator controls a motor capacity of a hydraulic motor having variable capacity functioning as a driving source of the hydraulic winch in response to a load pressure, a negative brake stops and retains the hydraulic motor at an automatic shutoff for prevention of overloading, and a controller sends signals to the regulator via a regulator-controlling valve at the automatic shutoff to set the motor capacity at a large value. Thus, the delay to recover the motor capacity at the time of returning from the automatic shutoff that is activated during winding-up of a load does not occur, and a control response is increased.