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. 16, 1981
Filed:
Mar. 02, 1979
Hans-Theodor Grisebach, Unna, DE;
Gewerkschaft Eisenhutte Westfalia, Lunen, DE;
Abstract
A mineral winning machine is moved back and forth along a mineral, e.g., coal, face to win mineral by a combination of cutting and wedging actions. To effect this winning mode, the machine has at least one cutting device with a cutting disk rotating in front of a frusto-conical wedging body which revolves in an eccentric manner to detach the mineral previously backcut by the disk. The wedging body and the cutting disk are driven by separate concentric drive shafts, preferably with variable speed regulation with the disk rotating faster than the wedging body. In an alternative construction, a cutting chain equipped with both cutting and wedging tools in differential relationship is circulated and engages the mineral face.