Leg prosthesis with an artificial knee joint provided with an adjustment device
AssigneeBiedermann Motech GmbH
InventorLutz Biedermann
Life of this patent
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Abstract
A leg prosthesis having an artificial knee joint with swing phase control and recoil break comprises a damping member acting upon the knee joint, detectors for detecting force, knee angle and acceleration and a control unit for controlling the dampening degree of the damping member on the basis of the detected values. The damping characteristics of the damping member are varied in dependence on control signals produced by the control unit on the basis of a viscosity change of the magneto-rheological liquid.
Claims9
A leg prosthesis having an artificial knee joint with swing phase control and recoil brake, said prosthesis comprising:
- means for producing control signals for controlling said knee joint;
- and
- a control member controlling said knee joint on the basis of said control signals;
- said control member comprising a damping member in the form of a piston cylinder device having a piston and a cylinder filled with a magneto-rheological liquid and means for changing the viscosity of said magneto-rheological liquid within the cylinder on the basis of said control signals, wherein a damping effect is provided by the piston in the cylinder.
A leg prosthesis having an artificial knee joint with swing phase control and recoil brake, said prosthesis comprising:
- means for producing control signals for controlling said knee joint;
- at least one detector provided at said prosthesis for detection of force, knee angle or acceleration, said detector having a signal output;
- a control unit connected to said signal output for producing control signals on the basis of the values detected by said detector;
- and
- a control member provided at said knee joint for automatically controlling said knee joint on the basis of said control signals during operation of said prosthesis;
- said control member comprising a piston and a cylinder filled with a magneto-rheological liquid and means for changing the viscosity of said magneto-rheological liquid on the basis of said control signals, wherein said magneto-rheological liquid provides resistance within the cylinder, thereby providing a damping effect on the piston.
Dependencies are inferred from the claim text.