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:
May. 01, 2012
Filed:
May. 19, 2009
Thomas Heidrich, Wilhelmshaven, DE;
Johannes Schuerman, Jever, DE;
Thomas Heidrich, Wilhelmshaven, DE;
Johannes Schuerman, Jever, DE;
Manitowoc Crane Group France SAS, Ecully, FR;
Abstract
The invention relates to an electro-hydraulic leak compensating device for a mobile crane lowering brake system in an open hydraulic circuit with a hydraulic motor () coupled with a lifting unit (), a lowering brake valve () and a mechanical brake (), with a pressure sensor () which measures the hydraulic pressure prevailing on the load side of the hydraulic motor () in the hydraulic circuit and on the side of the lifting conduit () before the mechanical brake () is closed, in particular immediately before it is closed, as well as a method of electro-hydraulically compensating for leaks of a mobile crane lowering brake system in an open hydraulic circuit with a hydraulic motor () coupled with a lifting unit (), a lowering brake valve () and a mechanical brake (), comprising the following method steps: