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US2018209229A1
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Flow diversion sub for a down-the-hole drill hammer
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US2018171720A1
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Down-the-hole drill hammer having a roller bearing assembly
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US2016222732A1
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Down-the-hole drill hammer having a roller ramp clutch
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US2015345227A1
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Drill bit for a down-the-hole drill hammer having spirally arranged cutting inserts
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US2014360783A1
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Pressure control check valve for a down-the-hole drill hammer
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US2014131116A1
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Non-rotating drill bit for a down-the-hole drill hammer
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AU2012203653B1
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Down-the-hole drill drive coupling
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AU2011235927A1
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Down-the-hole drill hammer having a sliding exhaust check valve
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AU2011202481A1
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Pressure reversing valve assembly for a down-the-hole percussive drilling appratus
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AU2010322100A1
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Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly
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