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:
Mar. 01, 2016
Filed:
Oct. 06, 2010
Christoph Pietrala, Dortmund, DE;
Christoph Pietrala, Dortmund, DE;
Caterpillar Global Mining Europe GmbH, Lunen, DE;
Abstract
A feed system, rack bar and drive sprocket for moving an underground winning machine having a travel drive with drive sprocket having symmetrically profiled teeth, and rack bars with a plurality of rack teeth being arranged between a supporting strip and a guide strip of the rack bar. The tooth flanks of the teeth are inclined in the direction of movement and diverge towards the tooth tip for the interaction with tooth surfaces of teeth of drive sprocket. In order to improve the interaction between the teeth and produce less wear, the two tooth flanks of each rack tooth are concavely arched and form a trough between guide strip and supporting strip transversely to the direction of movement, with the trough rising towards the tooth tip, and the two tooth surfaces of each drive sprocket tooth is convexly arched and forms a crown transversely to the direction of movement.