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 method for restraining a passenger within a seat, the method comprising:
moving a restraint bar in one direction from a disengaged position to an engaged position to restrain a passenger, the restraint bar being unable to proceed opposite the one direction when engaged;
moving the restraint bar opposite the one direction from an engaged position to a disengaged position after opening a valve in a piston operably coupled to the restraint bar; and
when moving the restraint bar fluid passes through one or more check valves in series.
2. The method of claim 1 further comprising providing an electronical signal to open the valve.
3. The method of claim 1 further comprising sensing the presence of an object associated with the valve to determine the position, open or closed, of the valve.
4. A method for restraining a passenger within a seat, the method comprising:
moving a restraint bar in one direction from a disengaged position to an engaged position to restrain a passenger, the restraint bar being unable to proceed opposite the one direction when engaged;
moving the restraint bar opposite the one direction from an engaged position to a disengaged position after opening a valve in a piston operably coupled to the restraint bar; and
passing fluid through a rod head of the piston to the one or more check valves.
5. The method of claim 4 further comprising slidably engaging the rod head with a piston chamber via a pair of gaskets.
6. A method for restraining a passenger within a seat, the method comprising:
moving a restraint bar in one direction from a disengaged position to an engaged position to restrain a passenger, the restraint bar being unable to proceed opposite the one direction when engaged;
moving the restraint bar opposite the one direction from an engaged position to a disengaged position after opening a valve in a piston operably coupled to the restraint bar;
passing fluid through a fluid reservoir operably coupled to the piston;
providing positive pressure within the fluid reservoir with a head slidably engaged within the reservoir; and
engaging the head with gaskets to the interior of the reservoir.
7. The method of claim 1 further comprising opening another valve in another piston operably coupled to the restraint bar.