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. 07, 2014
Filed:
Sep. 16, 2009
Trevor D. Mentink, Oostburg, WI (US);
Robert J. Walker, Manitowoc, WI (US);
Trevor D. Mentink, Oostburg, WI (US);
Robert J. Walker, Manitowoc, WI (US);
Manitowoc Crane Companies, LLC, Manitowoc, WI (US);
Abstract
A mobile lift crane includes a boom pivotally mounted on a rotating bed and a boom hoist drum mounted in a frame connected to the rotating bed. A boom hoist line is wound on the boom hoist drum and connected to an upper equalizer and a lower equalizer, with the upper equalizer connected to the top of the boom, such that rotation of the boom hoist drum changes the amount of boom hoist line between the lower equalizer and the upper equalizer, thereby changing the angle between the rotating bed and the boom. The boom hoist drum frame, the lower equalizer and the upper equalizer each include cooperating attachment structures whereby the equalizers can be detachably connected to the frame so that the boom hoist drum, the lower equalizer, the upper equalizer and the boom hoist line can be transported between job sites as a combined assembly.