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:
Aug. 30, 1988
Filed:
Dec. 02, 1986
Gert Braun, Essen-Heisingen, DE;
Ernst Braun, Essen-Heisingen, DE;
Abstract
Apparatus for hauling mined coal in a subsurface mining operation with a longwall conveyor, a drift conveyor and a cross frame with stripper for the connection of the longwall conveyor with the drift conveyor. The longwall conveyor and the drift conveyor are designed as chain scraper conveyors and include a conveyor trough with trough bottom and trough sidecheeks, pushers guided in the sidecheeks, and at least one pull chain with which the pushers are connected and which runs in the region of the trough center at least in the case of the longwall conveyor. On the side away from the lateral discharge, the pushers are guided in a guide trough continuing the associated trough sidecheek. A track-in device for disengaged pushers of the longwall conveyor running with one arm on the trough sidecheek is provided, which comprises a track-in cutout in the trough sidecheek. The track-in device is disposed in a hauling direction directly before the stripper and comprises, beginning in the region of the track-in cutout, a lowered trough bottom which leads via a trough sidecheek cutout into the drift conveyor. A stripper acts as an engaging element which covers the lowered trough bottom toward the guide rail and the guide rail connects with the level of the lowered trough bottom via a step passable by the pushers or via an appropriate transition.