Patent ID: 7955389
Filing Date: 2011-06-07
Classification: A61F

Abstract:
1. An artificial sphincter system comprising: (1) a hollow object, which has the ability of contraction and expansion; (2) a shape memory alloy, which is connected with the hollow object, which changes its shape to imitate the motion of human muscle when different amounts of electric current are applied; (3) an electric power to provide different amounts of electric current to the shape memory alloy to cause the shape memory alloy to contract or expand to control the motion of the hollow object to imitate the motion of human muscle; and (4) a photo resistor added between the electric power and the shape memory alloy, which senses the brightness of surrounding light and controls A/D (analog-to-digital) values of the electric power to cause different conditions of contraction and expansion of the shape memory alloy.