Patent · US Expired

Method of drilling through a bone structure

US4951690A · kind A · utility

67Cited by
3References
8Claims
0Family size

Inventor

Key dates

Filing dateJan 23, 1989
Grant dateAug 28, 1990
Priority date—
Expiry dateJan 23, 2009

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB23B2251/14
  • WIPO fieldMedical technology
  • WIPO sectorInstruments

Abstract

A new drill-type cranial perforator is disclosed of the type which comprises a front drill head assembly made up of a leading inner drill and a trailing outer drill, and a rear support and drive assembly adapted to enable both drills so long as the leading inner drill is encountering a resistive surface and to disable both drills when the leading inner drill stops encountering the resistive surface. The leading inner drill has at least one drilling flute with a forward cutting edge including a reentrant cutting segment axially rearward from the outer end of the forward cutting edge and extending inwardly towards the longitudinal axis of the perforator.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.