Artificial knee joint having a swing phase control member

Details Artificial knee joint having a swing phase control member Artificial knee joint having a swing phase control member

1999-03-12

2000-09-12

Willse, David H.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Leg

Knee

623 26, A61F 264, A61F 274

Patent

active

061171778

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).

REFERENCES:
patent: 5904721 (1999-05-01), Henry et al.

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