Inflatable seat restraint system using an inflation integrated inertia reel

An inflatable seat belt restraint system including a shoulder belt, an inflatable restraint, an inflation integrated inertia reel, and a shoulder belt anchor opposite to the inflation integrated inertial reel. The system can further include a lap belt and lap belt inertia reel. The inflation integrated inertia reel includes a webbing anchor, a drum having a pressure vessel, and a port for ducting inflation gas from the pressure vessel to the inflatable restraint. The inflation integrated inertia reel can further include an inflator in fluid communication with the pressure vessel. Upon deployment, gas flows from the inflator, into the pressure vessel, through the port, and into the inflatable restraint. The system can also include, a pressure-actuated locking mechanism locks the drum when the pressure vessel is pressurized. A corresponding method for deploying an inflatable restraint is also disclosed.