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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Estarta y Ecenarro SA
Original Assignee
Estarta y Ecenarro SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Estarta y Ecenarro SAfiledCriticalEstarta y Ecenarro SA
Priority to ES0035797UpriorityCriticalpatent/ES35797Y/en
Publication of ES35797UpublicationCriticalpatent/ES35797U/en
Application grantedgrantedCritical
Publication of ES35797YpublicationCriticalpatent/ES35797Y/en
Calculation rule for drilling, characterized in that it comprises a combination of ruler and screed provided with scales and windows or cooperating notches so that a set of scales is obtained for the determination of the speed of the bit depending on the cutting speed , a set of scales to obtain the drilling time in dependence of a relative position of the ruler with respect to the ruler, function of various combinations of speed of advance, and a set of scales to determine the power required for drilling, depending on the bit speeds and a relative position of the ruler with respect to the rule, depending on the materials to be drilled. (Machine-translation by Google Translate, not legally binding)
ES0035797U1953-04-161953-04-16
Slide rule for drilling
ExpiredES35797Y
(en)
Additional drill device for drilling and countersinking with different profiles in the same operation. (Machine-translation by Google Translate, not legally binding)