Title:
Mine drilling machine
United States Patent 2958514
US Patent References:
/1077856.html
- - 1077856

/1092583.html
- - 1092583

/1195108.html
- - 1195108

Drilling mechanism
- - 1878036

Apparatus for rock tunneling
- - 1992129


Inventors:
Lee, Arthur L.
Publication Date:
11/01/1960
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Assignee:
CONSOLIDATION COAL CO
Primary Class:
175/122
Other Classes:
175/195, 173/147, 74/840, 173/184
International Classes:
E21B15/04; E21B19/084; E21B15/00; E21B19/00
US Patent References:
2060814Drilling machine
2143105Feeding mechanism for rock drills
2144627Drilling apparatus
2288542Drilling apparatus
2296818Rock drill
2296819Rock drill
2301887Portable mechanically operated drill
2319512Earth boring machine
2323493Kerf-cutting machine
2338625Rock drill
2347499Rock drill
2365681Drill steel centralizer
2365749Rock drill
2377279Lift
2388720Drilling apparatus
2408387Timber setting machine
2491273Drilling apparatus
2500932Drilling apparatus
2570400Kerf-cutting mining machine
2581667Mining apparatus
2634950Coal drill
2661189Centralizer
2670931Apparatus for drilling holes for roof anchors
Foreign References:
GB531465A