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. 12, 2000
Filed:
Mar. 12, 1999
Sen-Jung Chen, Taipei, TW;
Chien-Chuan Chen, Taipei, TW;
Abstract
An artificial knee joint includes a hollow cylinder (5) in which a piston member (62) is disposed movably. The piston divides the cylinder (5) into upper and lower chambers (51, 52). The swing phase control member (8) has first and second channels (80, 81), a fulcrumed lever member (82) bridging the first and second channels (80, 81). The second channel (81) is communicated with the upper and lower chambers (51, 52). The first end of the lever member (82) extends into the first channel (80) for movement in response to an air pressure in the first channel (80). The second end of the lever member (82) has a first throttle valve unit (83) for regulating the air flow through the second channel (81) in response to a movement of the lever member (82). A pump unit (7) is associated operatively with the piston member (62) for pumping air from the ambient to the first channel (80) in response to a movement of the piston member (62).