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Priority to ES100409UpriorityCriticalpatent/ES100409Y/en
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Publication of ES100409YpublicationCriticalpatent/ES100409Y/en
Mine sharpening device, which is essentially characterized by three pieces, one of which has a conical, hollow conformed shape, devoid of a larger base and with a central hole in the smaller base, another part of which is a cover for the larger base, the third piece being a band of rough material, formed in a frustoconical manner to be able to adapt on the inner surface of the first mentioned piece, in the area of its greater base, so that the rough part is directed towards the inside of the enclosure. (Machine-translation by Google Translate, not legally binding)