Vertically adjustable seat with energy absorbing means

DETAILED DESCRIPTION I claim as my invention: 1.
A vertically adjustable vehicle seat with impact energy-absorbing means, which comprises in combination: a.
a unitary seating section for the seat occupant with a cushioned seat portion and an attached seat back portion, b.
a separate seat supporting framework including a base section for attachment to a vehicle and an upwardly extending framing portion to be adjacent the seat back portion of the unitary seating section, c.
a slidable attachment means between said upwardly extending framing portion and the seat back portion of said unitary seating section to provide a resulting non-pivoting and closely coupled guided support arrangement for such section, d.
an adjustable length weight supporting seat height adjuster means with lower end connection means providing attachment to the lower part of the seat supporting framework and with an upper end connection means to provide attachment to the seat back portion of the seating section, whereby the entire unitary seating section can be adjustably raised and lowered, and e.
at least one end connection means for said height adjuster means being in longitudinal alignment therewith and incorporating as a portion thereof a restricted section and a movable member to move there-through to thereby effect a yielding engagement between the seating section and the supporting framework where there is a crash landing or a sudden deceleration of the vehicle.
2.
The adjustable seat of claim 1 further characterized in that said restricted section for a connection means for said height adjuster means comprises a slotted means in plates connective with said movable unitary seating section and said movable member comprises a transverse pin member connective to the height adjusting means such that there may be relative movement between the pin means and the slot means to effect the yielding engagement therebetween.
3.
The adjustable seat of claim 1 further characterized in that the adjustable length seat supporting linkage means comprises a hydraulic lock type of unit with an external piston rod and internal piston means adjustable from the flow of fluid around the piston means in such lock unit