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:
May. 13, 1986
Filed:
Apr. 22, 1985
Herbert Schupphaus, Bochum, DE;
Abstract
A control for a mining machine having means for traversing a ground surface and a universally-pivotal carrier arm of variable length which carries at its forward end a cutter drum. A displacement pickup is responsive to forward or aft movement of the cutter drum with respect to the ground surface. Means are connected to the displacement pickup for producing a first signal when said cutter drum has moved forwardly in an amount substantially equal to its length and for thereafter producing a second signal when the cutter drum is moved backwardly in an amount equal to a fraction of its length. These signals are used to control forward or aft movement of the mining machine over the ground surface, or extension or retraction of the variable length carrier arm, to remove ribs in the side walls after a cut has been taken from the mine face area, these ribs resulting from the shape of the cutter drum and its angularity with respect to the mine roadway side walls.