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. 22, 1980
Filed:
Feb. 27, 1978
Willy Lanfermann, Bochum, DE;
Abstract
A rack device including a plurality of rack segments arranged end-to-end for extending along the side wall of a face conveyor while carrying a mining machine having a gear drive engageable with the rack device to propel the machine along the conveyor at the working face of a mine. The rack segments are joined at their abutting ends by pivot shafts to holders slideable along a rail that is supported by conveyor pan sections or side bracket portions of the face conveyor. The space between drive pins at the ends of the consecutively arranged rack segments is greater than the drive pin pitch by an amount corresponding to the distance of travel by these drive pins from an aligned relation of the rack segments into a maximum angular relation between the rack segments. Sliding movement by the holders on the rail is limited by one or more stop abutment members for each holder. A connecting link extends between two stop abutment members when employed at opposite sides of an individual holder. The holders include projections retained for sliding travel by a guide strip secured to the side bracket of the conveyor. The stop abutment members are also retained by the guide strip.