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:
Jan. 17, 1995
Filed:
Mar. 08, 1994
Robert Kraus, Attleboro, MA (US);
Johnson & Johnson Professional Inc., Raynham, MA (US);
Abstract
A device to stop the penetration of a cranial drill that is used to pierce the skull during neurosurgical procedures. The device uses a plurality of spacers that each have a body in the form of a cylinder having a bore extending therethrough with a flat disc adjacent the cylindrical body with a plurality of tabs fixed to the disk in a circumferential pattern around the bore and axially aligned therewith. The periphery of the disk having a diameter larger than the cylindrical body portion to form a gripping member. Each of the tabs having an indent positioned on an outer surface and an interior surface of the cylindrical body portion having a bead positioned around the interior diameter of the cylindrical body portion so that the indents in the tabs are adapted to engage and retain a bead of another spacer when the spacers are fitted together to define a drill stop. Each of the plurality of spacers are of different lengths than at least one of the other spacers.