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Canadian Ingersoll Rand Co Ltd
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Canadian Ingersoll Rand Co Ltd
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Application filed by Canadian Ingersoll Rand Co LtdfiledCriticalCanadian Ingersoll Rand Co Ltd
Application grantedgrantedCritical
Publication of FR1174169ApublicationCriticalpatent/FR1174169A/fr
E21C27/00—Machines which completely free the mineral from the seam
E21C27/20—Mineral freed by means not involving slitting
E21C27/22—Mineral freed by means not involving slitting by rotary drills with breaking-down means, e.g. wedge-shaped drills, i.e. the rotary axis of the tool carrier being substantially perpendicular to the working face, e.g. MARIETTA-type
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Engineering & Computer Science
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Mining & Mineral Resources
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Mechanical Engineering
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Life Sciences & Earth Sciences
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General Life Sciences & Earth Sciences
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Geochemistry & Mineralogy
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Geology
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FR1174169D1957-04-111957-04-11Machine combinée d'abattage et de chargement pour les mines
ExpiredFR1174169A
(fr)