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. 21, 1999
Filed:
Feb. 21, 1997
Hans Schmotzer, Aarau, CH;
Willi Horber, Zurich, CH;
Plus Endoprothetik AG, Rotkrenz, CH;
Abstract
An endoprosthetic knee joint has a femur portion, a tibia portion, and a coupling portion. The femur portion has a femur shaft having convexly curved condyle shells at a lower end, the shells having primary slide surfaces and two spaced apart side walls forming an intercondylar space. The tibia portion has a tibia shaft with a tibia plateau at an upper end, upon which are formed secondary slide surfaces. The tibia plateau has an axial recess. The coupling portion has a coupling pin rotatably housed in the recess, and a joint head at the upper end of the pin projects into the intercondylar space. The joint head has a bore extending transversely to the femur axis and is pivotally mounted by a coupling bolt which extends through the bore and is supported on the side walls of the condyle shells. A slide bush may be provided about the medial portion of the coupling bolt to enhance flexion/extension capability and varus/valgus movement. This knee joint provides higher resistance to breakage and enables varus/valgus compensation in the case of erroneous axial positionings.