Mining machine longwall propulsion means
AssigneeWorld Oil Mining Ltd.
InventorRobert W. Johns
Life of this patent
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Abstract
A propulsion motor is disclosed for use in propelling the mining machine used in a fixed arch shield mining system wherein the mining machine is movably supported by the shield. The propulsion motor comprises a power transfer means secured to the mining machine and being shiftable from a non-cutting position to a cutting position. The power transfer means includes a drive arrangement having portions engageable with certain of the arches of the mining shield for propelling the mining machine.
Claims12
A longwall propulsion means for the mining machine in a fixed arch shield mining apparatus wherein the mining machine is movably supported by the shield, the shield including a plurality of individually advanceable arch sections having a horizontal base portion and an upstanding portion in side-by-side relationship so that said upstanding portions collectively form a rack, said propulsion means comprising:
- a. power transfer means secured to the mining machine,
- b. said power transfer means being shiftable from a non-driving position to a driving position,
- c. said power transfer means including a drive member engageable with said rack when said power transfer means is in said driving position,
- d. means for actuating said drive member so that said drive member engages said rack and thereby advances the mining machine relative to said shield.
Dependencies are inferred from the claim text.