Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Having electrical actuator
Patent
1989-03-23
1991-11-05
Shay, Randy Citrin
Prosthesis (i.e., artificial body members), parts thereof, or ai
Having electrical actuator
623 43, 623 44, A61F 264, A61F 270, A61F 274
Patent
active
050628569
ABSTRACT:
A teaching playback swing-phase-controlled above-knee prosthesis has 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 has 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 detects the degree of opening of the valve of the air cylinder. An opening storage device for stores a plurality of set degrees of opening of the valve of the air cylinder. A phase detector detects swing phases and stance phases, walking speed detector determines an actual walking speed, and control unit adjusts 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 prosthesis 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:
patent: 4876944 (1989-10-01), Wilson et al.
Nakagawa et al., "Computer Controlled Above Knee Prosthesis", Bio-Mechanism, 8, Sep. 1986. Tokyo University, pp. 227-235.
Rosen et al., "Modification of Spastic Gait Through Mechanical Damping", IFAC Control Aspects of Prosthetics and Orthotics, May 1982.
Horn, "Electro-Control: An EMG-Controlled A/K Prosthesis," Med. & Biol. Engng., Jan. 1972.
Myers et al., "An Active EMG-Controlled A/K Prosthesis," IFAC Control Aspects of Prosthetics and Orthotics, May 1982, pp. 35 and 36.
Saxena et al., "E.M.G. Operated Electronic Artifical-Leg Controller," Med. & Biol. Eng. & Comput., Sep. 1977.
Amemori Kunio
Horiguchi Shiro
Kitayama Ichiro
Matsuda Hiromu
Nakagawa Akio
Kabushiki Kaisha Kobe Seiko Sho
Shay Randy Citrin
Willse David H.
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