A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 2/64 (2006.01) A61F 2/68 (2006.01) F16F 9/48 (2006.01) A61F 2/00 (2006.01) A61F 2/50 (2006.01) A61F 2/74 (2006.01)
Patent
CA 2137691
A device for damping of the turning movement of a joint, for example an artificial knee joint (10), is designed in such a way that the shaft (21) of one of the pivot points of the joint is provided with a gear-wheel (30) which in a hydraulic cylinder (1) influences a piston (27) connected to a rack-gearing (28). Channels (40, 41) with chokes and back valves (71, 91; 72, 92; 75, 93) connect the two sides of the piston of the hydraulic cylinder making possible adjustable damping in several steps for different parts of the turning movement. Moreover, a compact design of joint and damping cylinder is achieved. The application also ref- ers to artificial joints including abovementioned devices for damping of the turning movement, especially artificial knee joints of the polycentric type with seven pivot points.
Gramnas Finn
Gramtec Innovation Ab
Smart & Biggar
LandOfFree
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