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:
May. 16, 1989
Filed:
Aug. 10, 1987
Applicant:
Inventor:
Richard L Walus, Norwell, MA (US);
Assignee:
Codman & Shurtleff, Inc., Randolph, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
128310 ; 128 / ; 408139 ;
Abstract
A cranial perforator with an internal clutch which is engaged when the drill is placed against a bone surface for drilling and which will automatically release when the drill penetrates the skull. The components of the drill are held together by a plastic sleeve and a retaining ring which is ultrasonically welded to the interior surface of the plastic sleeve.