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Priority to ES0050168UpriorityCriticalpatent/ES50168Y/en
Publication of ES50168UpublicationCriticalpatent/ES50168U/en
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Publication of ES50168YpublicationCriticalpatent/ES50168Y/en
By drill bit with double flat faces, characterized by a cylindrical handle, whose flat faces, have an oblique inclination and its edges are cuts to chisel the wood or drill it, said flat faces are separated by a few recesses and the end of the drill carries also some cuts, called inferior, which are the ones that indicate the perforation of the wood, at the beginning of the work getting that by not having the usual spoon shape and carrying a much thicker soul and its termination of the same diameter as the handle, the yield is greater, as well as its duration, not leaving shavings when starting the perforation, since the faces are flat in an oblique direction and also being characterized by the fact that said faces, right and left cuts, by their arrangement are very easy to effect the sharpening , with a maximum use of them. (Machine-translation by Google Translate, not legally binding)
ES0050168U1955-09-241955-09-24
Drill bit with flat double faces
ExpiredES50168Y
(en)