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. 22, 1979
Filed:
May. 01, 1978
Willy Lanfermann, Bochum, DE;
Dieter Lauterbach, Bochum, DE;
Abstract
A rack device consisting of movable and immovable rack segments extends along a face conveyor for a mining machine having a drive gear engageable with the rack device to propel the machine along the working face of a mine. Rack holders are fixedly connected to conveyor pan sections joined together for pivotal movement to form the face conveyor. The rack segments are coupled to spaced-apart rack holders by pivot shafts. The immovable rack segments extend along a single conveyor pan section while each movable rack segment bridges a joint between conveyor pan sections. Pivot shafts for the movable rack segments are received in elongated slots in the rack holders whereby the movable rack segments move through a gap distance formed by a clearance between the pivot shaft and the slot. This gap distance is greater in magnitude than the clearance between the joined conveyor pan sections.