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:
Oct. 06, 1992
Filed:
Feb. 06, 1990
Applicant:
Inventors:
F Thomas Watkins, Menlo Park, CA (US);
Albert K Chin, Palo Alto, CA (US);
Assignee:
Zimmer, Inc., Warsaw, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61F / ; A61F / ;
U.S. Cl.
CPC ...
623 16 ; 606 87 ; 606 99 ;
Abstract
Over tightening of the threaded rods used to engage and remove the cement for prosthetic joints is avoided by measuring the depth of the passages into which the rods are threaded and providing sleeves on the rods which serve as visual indicia of the extent of penetration of the rods into the cement. A depth gauge calibrated in both units of length and screw thread turns is provided for the measuring function. The sleeves are slidably received on the rods and proportioned to engage the edges of the passages into which the rods are threaded. In use, the sleeves slide toward a marker as the rods are threaded into place.