Patent ID: 9664211
Date: 2017-05-30
CPC Classifications: B29C,E05B,F16B,Y10T

Claim:
1. A shape memory polymer device comprising: a body consisting essential of a shape memory polymer and a spring, the body further comprising a first state and a second state, wherein the shape of the body in the first state is distinct from the shape of the body in the second state, wherein the shape memory polymer device is configured to transition from the second state to the first state when the shape memory polymer device is heated to a temperature near or above the glass transition temperature of the shape memory polymer material and the spring provides a force on the body, wherein the force provided by the spring is large enough to transform the body from the second state into the first state when the shape memory polymer device is heated to a temperature near or above the glass transition temperature, wherein the force provided by the spring is not large enough to transform the body from the second state into the first state when the shape memory polymer device is at a temperature below the glass transition temperature, and wherein the spring is an internal spring that is disposed within the body.