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US1657597A
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Method of forming lubricators
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US1834714A
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Spring handle for drifting drills
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US1654100A
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Lubricator for winding drums
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US1650091A
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Automatic lubricator
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US1603473A
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Rock-drilling apparatus
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US1637001A
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Fluid-operated tool
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US1613139A
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Drill-steel retainer
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US1666959A
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Lubricator
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US1660087A
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Lubricator
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US1547968A
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Valve operating and controlling means
|
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US1617225A
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Drill sharpener
|
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US1637012A
|
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Lubricating system for rock-drill sharpeners
|
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US1501099A
|
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Hoisting mechanism
|
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US1540187A
|
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Drill sharpener
|
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US1540191A
|
|
Drill-steel-sharpening apparatus
|
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US1617915A
|
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Rotary engine for rock drills
|
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US1617914A
|
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Rock drill
|
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US1629035A
|
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Fluid-operated motor
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US1629226A
|
|
Fluid-operated motor
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US1640082A
|
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Turbine reversing mechanism
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