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US3804466A
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Mining machine with a control system for a mining head
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US3825192A
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Feeding mechanism for reduction apparatus
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US3801157A
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Mining machine with a pivot structure for a mining head, gathering head and discharge conveyor boom
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US3802287A
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Detachable sprocket drive for a mill drum with inside liner
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US3787091A
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Cutting chain
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US3784259A
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Cutting chain link formed as integral element
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US3595011A
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Method of forming chain side bars with curved bearing surfaces
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US3590171A
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Rotary current collector
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GB1192879A
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An Extensible and Retractable Boom Construction
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US3542432A
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Method for mining material from the entire face
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US3516712A
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Mining machine for mining material from the entire face
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US3561553A
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Load-measuring system
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US3567139A
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Method of mulling
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US3505892A
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Large diameter sprocket wheel
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US3518892A
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Chain in which the side bars are formed with curved bearing surfaces
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US3479090A
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Continuous mining machine with pivot structure for mining head,gathering head and conveyor boom
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US3499684A
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Mining machine with drive construction for operating elements of the mining machine
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US3495876A
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Mining machine with drive system for mining head gathering means,conveyor and traction means
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US3498676A
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Mining machine with control and operating system for mining head and traction means
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US3478894A
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Extensible and retractable boom construction for cranes
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