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:
Feb. 14, 2006
Filed:
Aug. 01, 2003
Applicants:
Chien-liang Chen, Taipei City, TW;
Chien-chuan Chen, Taipei City, TW;
I-chun Chen, Taipei City, TW;
Inventors:
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61F 2/64 (2006.01); A61F 2/74 (2006.01);
U.S. Cl.
CPC ...
Abstract
An artificial knee joint connects a prosthetic lower leg to a residual thigh of a prosthesis wearer, and includes a knee-extending oil passage and a knee-flexing oil passage that is provided with a throttle valve. When the lower leg is pressed against the ground by the thigh, a controlling element activates the throttle valve to close the knee flexing oil passage so as to fix the thigh relative to the lower leg. Upon fast walking of the wearer, an air valve unit activates the throttle valve to reduce flow rate of oil flowing through the knee-flexing oil passage so that the lower leg can support the thigh effectively.