Mineral winning machines
First Claim
1. A mineral winning machine guided for movement back and forth alongside a mineral face and equipped with a plurality of separate cutting devices which are staggered and serve to cut into the mineral face to different depths as the machine progresses along the mineral face, wherein:
- each cutting device is composed of rotary cutting means for initially cutting into the mineral face and rotary wedging means for detaching mineral in a wedging action after the initial cutting operation performed by the associated cutting means, the cutting means and the wedging means of each device being rotatable about a common axis and, wherein drive means is provided for driving the cutting means and the wedging means of each device separately and individually with the cutting means being driven at a higher rotational speed than the wedging means.
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Accused Products
Abstract
A mineral winning machine is moved back and forth along a mineral, e.g., coal, face to win mineral by a combination of cutting and wedging actions. To effect this winning mode, the machine has at least one cutting device with a cutting disk rotating in front of a frusto-conical wedging body which revolves in an eccentric manner to detach the mineral previously backcut by the disk. The wedging body and the cutting disk are driven by separate concentric drive shafts, preferably with variable speed regulation with the disk rotating faster than the wedging body. In an alternative construction, a cutting chain equipped with both cutting and wedging tools in differential relationship is circulated and engages the mineral face.
41 Citations
10 Claims
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1. A mineral winning machine guided for movement back and forth alongside a mineral face and equipped with a plurality of separate cutting devices which are staggered and serve to cut into the mineral face to different depths as the machine progresses along the mineral face, wherein:
- each cutting device is composed of rotary cutting means for initially cutting into the mineral face and rotary wedging means for detaching mineral in a wedging action after the initial cutting operation performed by the associated cutting means, the cutting means and the wedging means of each device being rotatable about a common axis and, wherein drive means is provided for driving the cutting means and the wedging means of each device separately and individually with the cutting means being driven at a higher rotational speed than the wedging means.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
Specification