Patent · US Expired

Skull trepanation drill

US4319577A · kind A · utility

69Cited by

3References

14Claims

0Family size

Assignee

Aesculap-Werke AG · DE

Inventors

Gerhard Bofinger · Geisingen, DE
Wilfried Wolfle · Bad Dürrheim, DE

Key dates

Filing date	Apr 18, 1980
Grant date	Mar 16, 1982
Priority date	—
Expiry date	Apr 18, 2000

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/906
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A skull trepanation drill having a drive shaft, a main cutter engageable with the drive shaft under axial force and a sleeve-shaped housing slidable axially and rotatably on the drive shaft and provided at its free end with an auxiliary cutter. In use, the sleeve-shaped housing is restrained from axial movement on the drive shaft by a locking body extending into recesses in the housing and drive shaft. The housing is manually releasable from the drive shaft for cleaning by rotation of a cam on the latter. The cam moves a lock bolt axially of the drive shaft to a position permitting the locking body to retract from the recess in the housing.

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