Restraint systems and restraint system methods
Passenger restraint systems are provided. The restraint systems can include: a passenger seat supported by a frame; a restraint bar pivotably attached to the frame; and at least one piston operably engaged between the restraint bar and the frame. Restraint system pistons are provided. The pistons can include: a central chamber housing a piston head and rod; a fluid reservoir in fluid communication with the central chamber; and at least one electromechanical valve operable between an open and a closed position. Methods for restraining a passenger within a seat are also provided.
1. A passenger restraint system comprising:
a passenger seat supported by a frame;
a restraint bar pivotably attached to the frame; and
at least one piston operably engaged between the restraint bar and the frame, the piston moveable between a first position engaging the passenger in the seat and a second position disengaged from the passenger in the seat, wherein the piston comprises a cylinder head housing a pair of check valves.
2. The passenger restraint system of claim 1 wherein the pair of check valves are aligned in series.
3. The passenger restraint system of claim 1 further comprising a rod extending between the cylinder head and the restraint bar.
4. The passenger restraint system of claim 3 wherein at least one of the check valves is aligned with the rod.
5. The passenger restraint system of claim 3 wherein at least one of the pair of check valves resides within a perimeter defined by the cylinder head.
6. The passenger restraint system of claim 3 wherein at least one of the pair of check valves at least partially resides within a perimeter defined by the rod.
7. The passenger restraint system of claim 3 wherein the cylinder head defines an opening in fluid communication with at least one of the check valves.