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. 05, 2016
Filed:
Dec. 30, 2010
Armin Mozar, Hamm, DE;
Martin Junker, Essen, DE;
Armin Mozar, Hamm, DE;
Martin Junker, Essen, DE;
RAG Aktiengessellschaft, Herne, DE;
Abstract
A Longwall equipment for mechanical extraction in longwall mining, in particular in underground coal mining, having a face conveyor arranged along the coal face, having an extraction machine which can be displaced along the face conveyor and having shield support units attached to the face conveyor at an angle thereto, is characterized in that, in order to determine the absolute height position of determined elements of the longwall equipment, a liquid-filled hydrostatic tube balance () is installed along the coalface () on the selected elements () of the longwall equipment and is connected to a base station () arranged in one of the gate roads () and determined precisely in its height as a reference point, wherein pressure sensors () are incorporated into the tube conduit () of the hydrostatic tube balance (), distributed over the course of the longwall equipment on individual elements () of the longwall equipment, and are connected to a central evaluation and control unit.