Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Having electrical actuator
Patent
1993-06-09
1995-08-22
Willse, David H.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Having electrical actuator
623 44, A61F 264, A61F 270
Patent
active
054435242
ABSTRACT:
The present invention is intended to provide a teaching playback swing-phase-controlled above knee prosthesis which enables an external data setting to set the mechanism of the teaching playback swing-phase-controlled above knee prosthesis for conditions that enable the mechanism to operate for motions according to a walking speed. The teaching playback swing-phase-controlled above knee prosthesis includes a structural body having a thigh frame and a leg frame pivotally joined to the thigh frame for swing motion relative to the thigh frame, an air cylinder having a cylinder body, a piston axially slidably fitted in the cylinder body and provided with a valve, and a piston rod having one end fixed to the piston and the other end pivotally joined to the thigh frame, and a stepping motor for adjusting the opening of the valve of the cylinder. The opening of the valve of the cylinder is adjusted by the stepping motor to regulate sliding speed of the piston by adjusting the resistance against the flow of air through the valve so that the leg frame is able to swing relative to the thigh frame properly according to a predetermined walking speed. Data concerning the opening of the valve is taught to the teaching playback swing-phase-controlled above knee prosthesis by signals sent out by an external data setting device.
REFERENCES:
patent: 4846843 (1989-07-01), Gammer
patent: 5062856 (1991-11-01), Sawamura et al.
patent: 5252102 (1993-10-01), Singer et al.
Nakagawa et al., "Computer Controlled Above Knee Prosthesis", Bio-Mechanism, 8, Sep. 1986. Tokyo University, pp. 227-235.
Amemori Kunio
Araki Yoshihisa
Hamada Toshihiro
Horiguchi Shiro
Kitayama Ichiro
Hyogo Prefectual Social Welfare Corporation
Kabushiki Kaisha Kobe Seiko Sho
Willse David H.
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