Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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J Mata S A
Original Assignee
J Mata S A
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Filing date
Publication date
Application filed by J Mata S AfiledCriticalJ Mata S A
Priority to ES1970159433UpriorityCriticalpatent/ES159433Y/en
Publication of ES159433UpublicationCriticalpatent/ES159433U/en
Application grantedgrantedCritical
Publication of ES159433YpublicationCriticalpatent/ES159433Y/en
Processing Of Stones Or Stones Resemblance Materials
(AREA)
Abstract
A screw-drill, which is characterized in that at its tip, conical, adopts configuration of two-wire drill, which meet above to form from it the helical edge or thread of the screw, whose thread can be of any type and step; the head has a hollow hexagonal shape with a projecting edge and the lower face thereof is provided with small radial cuts of inclined plane in the same direction. (Machine-translation by Google Translate, not legally binding)
ES1970159433U1970-06-161970-06-16
A SCREW-DRILL.
ExpiredES159433Y
(en)