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. 01, 1990
Filed:
Nov. 07, 1988
Gert Braun, Essen-Heisingen, DE;
Ernst Braun, Essen-Heisingen, DE;
Halbach & Braun Industrieanlagen, Wuppertal, DE;
Abstract
A mining apparatus for the mechanized breaking-down of mineral raw materials, particularly coal, in underground mining operation includes at least one endless chain and chain wheels for the endless chain. A main drived is provided for one of the chain wheels and an auxiliary drive is provided for the other chain wheel. The main drive and the auxiliary drive each has a transmission unit including main transmission stage, initial transmission stage, coupling and drive motor. A superposed motor in the form of a controllable electric motor having small power acts in connection with a worm gear transmission on the superposed input of the superposed transmission unit. Synchronous running of the main drive and the auxiliary drive or the drive motors thereof is achieved by a unilateral drive control. This results in a uniform power and load input independently of the wear of the chain and chain wheels.