Down-the-hole drill drive coupling
A down-the-hole drill hammer is provided that includes a housing, a piston mounted within the housing, a drill bit mounted below the housing, and a drive coupling operatively engaged with the housing and drill bit. The drive coupling can be configured with a plurality of lugs circumferentially dispo...
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Main Author | |
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Format | Patent |
Language | English |
Published |
23.12.2014
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Subjects | |
Online Access | Get full text |
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