Spline element for seat in a vehicle
AssigneeFritzmeier AG
InventorWilhelm Wingen
Life of this patent
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Abstract
The present invention involves a spline element for a seat in a vehicle, in which the height of the seat can be adjusted without changing the spline initial stress, and wherein the initial stress of the spline can be adjusted without making a change in the height of the seat. This is achieved by means of a cylinder which provides an enclosed gas compression compartment against which a pair of pistons disposed at opposite ends of the cylinder can be adjusted from each end thereof. Each piston has flow channels provided therethrough which can be closed with the aid of a respective back stroke valve which can be set in motion at any time from the outside, thereby turning the piston into a floating piston.
Claims8
A spline element for a seat of a vehicle, which can be adjusted according to the height and weight load, comprising:
- an operational cylinder defining an enclosed pressure gas compartment;
- a pair of pistons adjustably disposed within said cylinder adjacent opposite ends thereof;
- each of said pistons being equipped with through flow channels leading from the gas compartment to the opposite sides of said pistons;
- a locking valve for each of said pistons which can close the flow channels on the rear side of the respective piston.
- one of said pistons forming a height adjusting piston and having a rod which leads from the operational cylinder as a stop end of the spline element, its locking valve being operable from the outside by a tappet which extends in the axial direction through the piston rod;
- the other of said pistons being formed as a floating piston, its locking valve being operable against the resistance of a lock spring by a weight adjusting piston which, under even pressure on both sides, can be inserted against the floating piston;
- means on said floating piston for mechanically limiting the return stroke of said weight adjusting piston;
- the other stop end of the spline element being formed by the piston rod of said weight adjusting piston which is drawn out of the operational cylinder;
- and
- a spring of the spline element being propped by said other stop end and by the operational cylinder.
Dependencies are inferred from the claim text.