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. 09, 1989
Filed:
Jul. 24, 1987
Applicant:
Inventors:
Herbert Schupphaus, Bochum, DE;
Siegfried Reike, Bochum, DE;
Assignee:
Gebr. Eickhoff Maschinenfabrik u. Eisengiesserei mbH, Bochum, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21C / ;
U.S. Cl.
CPC ...
299 42 ; 74661 ; 7466 / ; 192-0098 ;
Abstract
A shearer loader for underground mining operations including a duplex-input transmission coupled to the haulage box drive motor of the shearer loader. A first input of the duplex-input transmission is coupled to the haulage box office motor, and a second input of the duplex-input transmission is coupled to a drum-cutter drive motor of the shearer loader. During those times in which increased feed rates are required of the shearer loader, feed forces required for the increased feed rate is supplied by both the haulage box drive motor, and the drum-cutter drive motor.