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COMBINED ACTIVE AND PASSIVE LEG PROSTHESIS SYSTEM AND A METHOD FOR PERFORMING A MOVEMENT WITH SUCH A SYSTEM

  • US 20130204395A1
  • Filed: 03/18/2013
  • Published: 08/08/2013
  • Est. Priority Date: 04/19/2005
  • Status: Active Grant
First Claim
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1. A lower limb prosthesis for replacing a missing lower extremity of an individual, said lower limb prosthesis comprising:

  • a prosthetic foot member;

    a movable ankle joint member coupled to the prosthetic foot member, the ankle joint member comprisinga hydraulic assembly comprisinga hydraulic cylinder,a piston configured to move axially within the hydraulic cylinder between a first hydraulic chamber on one side of the piston and a second hydraulic chamber on an opposite side of the piston as the prosthetic foot member moves relative to the ankle joint member, the hydraulic chambers are defined in the hydraulic cylinder at least in part by the piston, anda valve actuatable to fluidly communicate the first and second hydraulic chambers, the valve configured to regulate hydraulic fluid flow between the hydraulic chambers so as to vary damping resistance of the ankle joint member;

    one or more sensors configured to sense one or more parameters associated with the motion of the lower limb prosthesis during ambulation; and

    a controller configured to receive input data from the one or more sensors corresponding to the one or more sensed parameters, the controller configured to control the operation of the valve to selectively actuate the valve to vary the damping resistance of the ankle joint member based at least in part on the one or more sensed parameters.

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