Patent ID: 8021435
Filing Date: 2011-09-20
Classification: A61F

Abstract:
1. A functional prosthesis mechanism for a hand comprising: a support plate, a displacement mobile, an actuator, and a safety plate, a worm gear having a plurality of channels, three fingers, a wrist, a join plate, said support plate comprising an opening to receive said actuator, a pair of displacement guides for supporting said displacement mobile, and a pair of perpendicular guides for holding said safety plate; said displacement guides providing support for said displacement mobile while allowing linear movement of said displacement mobile within said support plate; said actuator comprising a body and a shaft; said displacement mobile having internal threads to receive said worm gear and being moved linearly upon rotation of said worm gear, and a pair of guide pins; said worm gear being joined to said actuator shaft at a proximal end of said worm gear; said three fingers being assembled and articulated at the distal end of said support plate, at least two of said fingers having guide slots to receive said guide pins of said displacement mobile; said artificial wrist being located at a proximal end of said support plate, said artificial wrist supporting part of said actuator body and having a cavity to receive said joint plate; whereby, upon activation of said activator, said worm gear will rotate to produce linear movement of said displacement mobile, said movement causing said articulated fingers to open or close, depending upon the direction of rotation of said worm gear.