ARM PROSTHESIS CONTROL LINK LENGTH ADJUSTER Russian patent published in 1996 - IPC

FIELD: medical equipment, in particular, prosthetics of invalids with arm amputation. SUBSTANCE: the adjuster uses casing 1 with a recess, which accommodates drum 4 with the center of gravity on the external surface; the drum has groove 5 for the link, casing cover 2; flat spiral spring 7, whose ends are fastened to the casing and drum, and fixing assembly of drum 4, including a sleeve concentrically secured on the cover; installed in the sleeve hole is the stem of the clamp made in the form of a tapered cup with shoulders engageable with the slots made in fixing blocks 11, 12, having the shape of strips with cylindrical surfaces that are engageable with the drum hole. The blocks are spring-loaded "for divergence", and the clamp is spring-loaded relative to the casing recess and connected to the rope transmission of the control member. The end of the link located in the drum groove is connected to check 17, which can withdraw from the casing over a certain distance, thereby changing the length of the prosthesis control link attached to it. The other end of the control link is rigidly fastened to the casing. EFFECT: enhanced precision of adjustment of the prosthesis control link length, providing comfortable conditions for the invalid, enhanced reliability of fixation. 2 dwg