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:
Jun. 11, 2002
Filed:
Oct. 21, 1999
Eric C. Blom, Milwaukee, WI (US);
Harvey J. Kallenberger, Wind Lake, WI (US);
Harnischfeger Technologies Inc., Wilmington, DE (US);
Abstract
A dragline comprising a main housing including a generally horizontal platform, a boom extending forwardly from the main housing, a bucket suspended from the boom, a winding drum mounted on the platform for rotation about a generally horizontal axis, a fairlead mechanism mounted on the platform forward of the drum, the fairlead mechanism including an upper sheave mounted on a generally C-shaped upper bracket for rotation relative thereto about a generally horizontal upper axis, the upper bracket opening rearwardly and being mounted on the platform for pivotal movement about a generally vertical axis, and a lower sheave mounted on a generally C-shaped lower bracket for rotation relative thereto about a generally horizontal lower axis rearward and below the upper axis, the lower bracket being substantially identical to the upper bracket, opening forwardly and being mounted on the platform for pivotal movement about the generally vertical axis, such that the vertical axis extends between the upper and lower sheaves, and such that the upper and lower sheaves are supported for pivotal movement independently of each other about the vertical axis, the fairlead mechanism having no sheaves between the drum and the upper and lower sheaves, and a dragline rope which is wound around the drum and which extends forward from the drum, below the lower sheave, upward from the lower sheave to the upper sheave along the vertical axis, over the upper sheave, and forward from the upper sheave to the bucket for moving the bucket generally horizontally relative to the main housing.