using a locking piston actuated hydraulically

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CPC
E21C2035/1823

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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING

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E21C2035/1823using a locking piston actuated hydraulically

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Patents Grantslast 30 patents

Information Patent Grant
Cutter bit assemblies and arrangements for use with mining or tunne...
- Patent number 5,092,660
- Issue date Mar 3, 1992
- Gewerkschaft Eisenhutte Westfalia
- Bernd Steinkuhl
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents