Patent attributes
A vehicle seat, seat shell, suspension, and bolster therefor. Where a bolster is used, the bolster has a positive lock when in an elevated configuration. The suspension includes at least one beam spring that extends across a seat pan. In one preferred embodiment, a pair of such springs is carried by the pan. The springs preferably differ in compliance from one another and from a mesh load supporting grid that is connected to each spring. One such arrangement produces a suspension of progressive construction that enables the seat to handle a wide range of shocks, bumps, jolts, and vibration of varying frequencies and magnitudes. In one preferred embodiment, the seat includes a movable bolster movably attached to either the seat or shell. In a preferred embodiment, the bolster travels along a parabolic path when moved between its down and up positions.
