Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Having electrical actuator
Patent
1991-07-15
1992-07-28
Green, Randall L.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Having electrical actuator
623 26, 623 39, 623 44, A61F 264, A61F 270, A61F 274
Patent
active
051337738
ABSTRACT:
A teaching playback swing-phase-controlled above-knee prosthesis comprises a thigh frame, a leg frame, an air cylinder interconnecting the thigh and leg frames and provided with adjusting means for adjusting the degree of opening the valve of the air cylinder to a plurality of degrees respectively for a plurality of walking speeds selected during trial walking, a mode selecting switch having positions respectively for setting degrees of opening of the valve of the air cylinder in a teaching mode and for a playback mode in which one of the degrees of opening is selected according to an actual walking speed, an opening detector for detecting the degree of opening of the valve of the air cylinder, an opening storage device for storing a plurality of set degreess of opening of the valve of the air cylinder, a phase detector for detecing swing phases and stance phases, walking speed detector for detecting an actual walking speed, and control unit for adjusting the degree of opening of the valve of the air cylinder to one of the set degrees of opening corresponding to the actual walking speed. The teaching playback swing-phase-controlled-above-knee prothesis is capable of automatically controlling the speed of swing motion of the leg frame according to the actual walking speed of the prosthesis wearer.
REFERENCES:
Nakagawa et al., "All-In-One-Intelligent Above Knee Prothesis", Biomechanism 8, Sep. 1986: Tokyo University, pp. 227-235.
Rosen et al, "Modification of Spastic Gait Through Mechanical Dumping", JFAC Control Aspects of Prosthetics and Orthotics, May 1982.
Amemori Kunio
Horiguchi Shiro
Kitayama Ichiro
Matsuda Hiromu
Nakagawa Akio
Green Randall L.
Kabushiki Kaisha Kobe Seiko Sho
Willse D.
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