Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Having electrical actuator
Patent
1997-06-26
1999-03-30
Willse, David H.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Having electrical actuator
623 44, A61F 264, A61F 270
Patent
active
058882120
ABSTRACT:
A computer controlled hydraulic resistance device for apparatus such as a prosthetic knee for above knee amputees, includes a solenoid actuated valve connected to control the flow of hydraulic fluid to and from a hydraulic actuator which applies resistance to the prosthetic knee or other apparatus through a coupling. Hydraulic pressure is sensed on the high and low side of the actuator and is used by a micro-controller in a closed-loop manner to compensate automatically for variations in the device and in the hydraulic fluid viscosity. The device also senses the position of the apparatus and feedsback to the micro-controller for applying a predetermined resistance profile to the apparatus.
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"Design Principles, Biomedical Data and Clinical Experience With A Polycentric Knee Offering Controlled Stance Phase Knee Flexion: A Preliminary Report", Siegmar Blumentritt, PhD et al 1997, Journal of Prothetics and Orthotics, vol.9, No. 1, 18-24.
"Optimal Control For An Above-Knee Prosthesis With Two Degrees Of Freedom", D. Popovic et al, 1995, pp. 89-98, J. Biomechanics, vol. 28, No. 1.
Petrofsky Steven H.
Reinke Christian H.
Mauch, Inc.
Willse David H.
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