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. 24, 2021
Filed:
Apr. 22, 2020
Beijing Naton Medical Technology Research Institute Co. Ltd., Beijing, CN;
Tianjin Zhengtian Medical Instrument Co., Ltd., Tianjin, CN;
Senyuan Hu, Beijing, CN;
Dayong Song, Beijing, CN;
Xiang Dong, Beijing, CN;
Shufu Xu, Beijing, CN;
Zhihua Xu, Beijing, CN;
TIANJIN ZHENGTIAN MEDICAL INSTRUMENT CO., LTD., Tianjin, CN;
BEIJING NATON MEDICAL TECHNOLOGY RESEARCH INSTITUTE CO. LTD., Beijing, CN;
Abstract
A femoral prosthesis and a knee prosthesis are provided. The femoral prosthesis includes a condyle surface having a first surface section contacting a tibial joint surface over a first range of flexion angles and a second surface section contacting the tibial joint surface over a second range of flexion angles; the first range of flexion angles from a first to a second flexion angle; the second range of flexion angles from the second to a third flexion angle; the first flexion angle selected from −20° to 0°, the second flexion angle selected from 45° to 75°, the third flexion angle selected from 50° to 90° and the third flexion angle greater than the second flexion angle; the first surface section having a radius of curvature of a constant length, and the second surface section having a radius of curvature that decreases from a front end to the rear end.