The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 1982
Filed:
Apr. 18, 1980
Gerhard Bofinger, Immendingen-Hattingen, DE;
Wilfried Wolfle, Bad-Durrheim, DE;
Aesculap-Werke Aktiengesellschaft, Tuttlingen, DE;
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.