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:
Dec. 02, 1997
Filed:
Feb. 08, 1996
John Meyers, Columbia City, IN (US);
James R Toone, Fort Wayne, IN (US);
Mark Bryant, Auburn, IN (US);
Zimmer, Inc., Warsaw, IN (US);
Abstract
Abstract of the Disclosure Intramedullary reamers are well known in orthopaedic procedures for reaming out a tubular passage within a bone for accommodating an implant such as a femoral nail. The reamer head of this invention is designed to accommodate a press fit connection to a reamer shaft. Heretofore, such press fit connections placed a hoop stress on the neck of the shaft such that the hoop stress significantly exceeded the yield strength of the material. Therefore in such prior art heads, the neck of the head would begin to crack adjacent the opening of the neck. The reamer head of this invention substantially reduces the hoop stresses on the neck of the head at its opening and provides for a smoother transition of stresses along the neck by forming a counter bore through the neck while maintaining a satisfactory press fit connection between the head and the shaft.