A hand prosthesis includes a chassis to which a number of finger prostheses are articulated. Each of the finger prostheses are movable relative to the chassis and toward one another about at least one swiveling axis via a drive that is connected to the finger prostheses by a force transmission unit....http://www.google.ca/patents/US7867287?utm_source=gb-gplus-sharePatent US7867287 - Hand prosthesis with fingers that can be aligned in an articulated manner
