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:
Sep. 14, 1999
Filed:
Oct. 02, 1997
Russell P Holmes, Boston, MA (US);
Other;
Abstract
A screw removal system is provided that can be used to remove a broken screw piece, which is embedded in a bone. The screw removal system includes an internally-threaded outer tube and a T-handled shaft which screws into the tube. The outer tube includes at one end two flange legs that engage the second or third thread of the broken screw piece and a bonding component sized to engage the broken screw piece. With the outer tube held in a stationary position by a wrench, the T-handled shaft is rotated downwardly to force the flange legs, and the bonding component into a locking engagement with the broken screw piece. After this locking engagement is achieved, the outer tube wrench is held so that it can rotate with the T-handled shaft and the broken screw piece can be unscrewed out of the bone upon continued rotation of the T-handled shaft, which causes the rotation of both the outer tube and the engaged screw piece.