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:
Jul. 31, 1979
Filed:
Jun. 23, 1978
Klaus Oberste-Beulmann, Sprockhovel, DE;
Abstract
A drive gear of a drum-cutter mining machine engages a rack device extending along the working side of a face conveyor to propel the mining machine along a mine face. Spanning each joint between conveyor tray sections is a bridging rack segment with leg extensions interlocked with recesses formed in extended end members of non-bridging rack segments each of which extends along a single conveyor tray section and is secured thereto by bolts. Rack teeth are formed by spaced-apart pin members carried by lugs outwardly of the face conveyor. The ends of the pin members at the face conveyor for the bridging rack segments are carried by U-shaped plates with a tongue plate engaged behind the extended end members of the non-bridging rack segments. The ends of the pin members at the face conveyor for the non-bridging rack segments are carried by flanges having lower, outwardly-bent sections extending toward the mine floor to form a ramp at the working face side of the face conveyor.