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:
Aug. 20, 1991
Filed:
Jan. 19, 1990
Milton B McColl, Los Altos Hills, CA (US);
Albert K Chin, Palo Alto, CA (US);
Origin Medsystems, Inc., San Mateo, CA (US);
Abstract
A mantle of cement having an elongate cavity formed therein is removed from adhered condition within a bone recess by successively breaking away sections of the mantle with a plurality of elongate screw threaded pulling elements proportioned to engage a limited length of a screw threaded mass of cement received in the cavity. The apparatus of the invention is provided in kit form with sufficient elements to enable the full length of the mantle to be removed in successive steps. The kit may also include a cement injection syringe and vent tube to fill the cavity of the mantle with a mass of cement, a die to form a screw threaded passage in the mass of cement, and a slap hammer connectable to the pulling elements.