Patent ID: 9101499
Filing Date: 2015-08-11
Classification: A61F,B25J

Abstract:
1. A hand prosthesis ( 310 ) comprising a plurality of digits ( 316 , 318 , 320 ) each movable relative to a main support ( 314 ) of the prosthesis ( 310 ), respective actuators ( 322 ) of the digits ( 316 , 318 , 320 ), a control processor ( 326 ) connected to operate the actuators ( 322 ) in dependence upon signals issued to the control processor ( 326 ) by the user, and transducers ( 325 ) connected to the control processor ( 326 ) and also respectively to the actuators ( 322 ) to provide signals to the control processor ( 326 ) indicative of the amount of movement effected by the actuators ( 322 ), in which the actuators ( 322 ) are operated by the control processor ( 326 ) in dependence upon the signals it receives from the transducers ( 325 ) and in accordance with the signals issued by the user, characterized in that the current actual positions of the digits ( 316 , 318 , 320 ) are held in memory locations within the control processor ( 326 ) and are constantly updated by the transducers ( 325 ) when the hand prosthesis ( 310 ) is in use, and in that the desired positions of the digits ( 316 , 318 , 320 ) are stored in memory locations within the control processor ( 326 ), and the latter is programmed to calculate the required speeds to move the digits ( 316 , 318 , 320 ) by comparing the actual positions with the desired positions of each digit ( 316 , 318 , 320 ).