Abstract: An apparatus for dynamically stiffening a vehicle seat back may include a vehicle seat including a seat bottom mountable within a vehicle, a seat back extending upwardly away from the seat bottom, and a bight defined at a forward-facing interface between the seat bottom and the seat back, an occupant restraint harness coupled to the vehicle seat and engaging a top end of the seat back, and a seat back stiffening apparatus having a seat back stiffening member and an actuator coupled to the occupant restraint harness adjacent to or near the bight of the vehicle seat. The actuator may be responsive to a first force applied thereto by the occupant restraint harness in excess of a first threshold force to deploy the seat back stiffening member to couple to and between the seat bottom and the seat back to add stiffness to the seat back frame.

Abstract: A web tightening apparatus is disclosed for a multi-point restraint harness having a web extendable about an occupant of a motor vehicle seat. A base frame is mounted between the seat and a floor of a motor vehicle, a web turning guide is mounted to and within the base frame with the web extending into the base frame and through the web turning guide, a ratcheting device is mounted to the base frame and has a handle, and a ratcheting web is coupled at one end to the web extending from the web turning guide and coupled at an opposite end to the ratcheting device. The ratcheting device is responsive to ratcheting actuation of the handle to draw the ratcheting web therein, wherein movement of the ratcheting web into the ratcheting device draws the web further into the base frame and thereby tightens the web about the occupant.

Abstract: A web tightening apparatus is disclosed for a multi-point restraint harness having a web extendable about an occupant of a motor vehicle seat. A base frame is mounted between the seat and a floor of a motor vehicle, a web turning guide is mounted to and within the base frame with the web extending into the base frame and through the web turning guide, a ratcheting device is mounted to the base frame and has a handle, and a ratcheting web is coupled at one end to the web extending from the web turning guide and coupled at an opposite end to the ratcheting device. The ratcheting device is responsive to ratcheting actuation of the handle to draw the ratcheting web therein, wherein movement of the ratcheting web into the ratcheting device draws the web further into the base frame and thereby tightens the web about the occupant.

Abstract: An apparatus for dynamically stiffening a vehicle seat back may include a vehicle seat including a seat bottom mountable within a vehicle, a seat back extending upwardly away from the seat bottom, and a bight defined at a forward-facing interface between the seat bottom and the seat back, an occupant restraint harness coupled to the vehicle seat and engaging a top end of the seat back, and a seat back stiffening apparatus having a seat back stiffening member and an actuator coupled to the occupant restraint harness adjacent to or near the bight of the vehicle seat. The actuator may be responsive to a first force applied thereto by the occupant restraint harness in excess of a first threshold force to deploy the seat back stiffening member to couple to and between the seat bottom and the seat back to add stiffness to the seat back frame.