ARTIFICIAL ARM PROSTHESIS Russian patent published in 1997 - IPC

FIELD: orthopedics and prosthetics. SUBSTANCE: invention is designed for invalids with upper limbs amputated. Artificial arm contains shoulder and antebrachium cartridges hinged to each other, control rod, over-shoulder piece, axillary piece, pulling means, and key control panel attached to antebrachium cartridge. Into gap of control pull rod, rod length regulator is inserted. Its case accommodates cords, mobile unit, extension spring, and a cam actuated through cable transmission by the aid of key disposed in box case attached to shoulder cartridge, which is pressed toward side body surface by movement of stump of invalid. Rod length regulator makes it possible to enlarge rod length and lock it in order to weaken its residual strain at moments when invalid does not control rotation of antebrachium. EFFECT: increased comfort in using artificial arm because of reduced fatigue. 3 dwg