Patent ID: 6808540
Filing Date: 2004-10-26
Classification: A61F

Abstract:
An artificial knee joint with a pair of link mechanisms, the artificial knee joint comprised of:a thighbone prosthesis (21) and a shank prosthesis (22) connected by a front and a back base link (10,11), both base links (10,11) having a first end, where the first end of the back base link (11) is joined to a first attachment element (23) and the first end of the front base link (10) is joined to a second attachment element (24), with each attachment element (23,24) being attached to attachment points (16,17), respectively, on the shank prosthesis (22); and both links (10,11) having a second end attached to an upper connecting element (12) connected to the thighbone prosthesis (21), whereby the attachment points (16,17) of the shank prosthesis (22) are arranged in the movable first and second attachment elements (23,24) so that at a substantially straight knee, the link mechanisms (10,11) is located at a first position, and a second position, when the knee is bent, where the knee joint further comprises a resilient stop device (29), characterized by: the first attachment element (23) cooperating, through a cam follower (27), with said resilient stop device (29) to admit flexing of the thighbone prosthesis (21) in relation to the shank prosthesis (22) up to an angle exceeding stance flex during compression of said stop device (29) at said first position; and disengaging from said resilient stop device (29) at said second position.