Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Having electrical actuator
Patent
1997-07-14
1999-04-13
Willse, David H.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Having electrical actuator
623 44, A61F 264, A61F 270
Patent
active
058938915
ABSTRACT:
An adaptive control system for an artificial limb has a piston and cylinder assembly for controlling knee joint flexion, an electronically driven motorised valve for varying the damping effect of the assembly, a proximity sensor for sensing knee flexion, and a processor circuit for mounting on the limb. The system also has a radio receiver connected to the processor circuit and an operator control unit for remote transmission of command signals to the receiver. In a teach mode, the system allows an operator to increment the valve opening by remote control to optimise operation of the limb, and to cause the processor circuit to record selected valve openings in conjunction with average step period values which are produced automatically by the system during use of the limb. Recording a new selected valve opening causes the processor circuit on the limb automatically to calculate a set of control data relating valve openings to walking speed ranges. This set of control data is used in a playback mode of the system for automatically adjusting the valve opening during normal use of the limb.
REFERENCES:
patent: 4246661 (1981-01-01), Pinson
patent: 5062857 (1991-11-01), Berringer et al.
patent: 5443524 (1995-08-01), Sawamura et al.
Goldfarb et al, "Self-Contained, Microcomputer-Controlled, Above-Knee Prosthesis," Proceedings, Seventh World Congress of ISPO, Jun. 28, 1992, Chicago, U.S.A.
Flowers et al, "A Microcomputer-Controlled Knee Mechanism for Above Knee Prostheses", Third CISM-IFToMM International Symposium on Theory & Practice of Robots and Manipulators, 1978, Udine, Italy.
Peeraer et al, "A Computer-Controlled Knee Prosthesis", Journal of Medical Engineering and Technology, vol. 13, No. 1/2, Jan./Apr. 1989.
Koganezawa et al, "A Development of A/K Prosthesis Adaptable to Voluntary Walking Period", Eighth International Symposium on External Control of Human Extremities, 1984, Dubrovnik, Yugoslavia.
Arezina et al, "Development of a Control Programme for the Active Above-Knee Prosthesis", Proceedings of Eighth International Symposium of ECHE, 1984, Dubrovnik, Yugoslavia.
Chas. A. Blatchford & Sons Limited
Willse David H.
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