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Sprung vehicle seat

  • US 4,461,444 A
  • Filed: 11/12/1981
  • Issued: 07/24/1984
  • Est. Priority Date: 11/15/1980
  • Status: Expired due to Term
First Claim
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1. In a sprung vehicle seat with adjustment for height and for weight so that the vehicle seat is always at a manually adjustable preset height, even when users of the seat are of different weights, said sprung vehicle seat being of the type which includes a gas spring arranged between a seat support frame and a base frame;

  • a switching means for controlling the gas spring;

    an actuator means which is movable relative to the switching means when there is a change in the height of the seat support frame above the base frame;

    a slide member which for the purposes of adjusting the preset height can be locked to one of the frames selectively in a plurality of positions on a line of displacement which is parallel to the relative displacement between the switching means and the actuator means;

    a holder which is carried by the slide member and movable transversely with respect to the line of displacement thereof between a first and a second position and which carries either the switching means or the actuator means, wherein the holder is spring-biassed toward the first position, in which first position the actuator means and the switching means are spaced from each other in the transverse direction of their relative movement by a spacing such that the actuator means and the switching means are non-cooperable, thereby to avoid actuation of the gas spring during normal spring movement of the seat while the seat is occupied by a user, while in the second position of the holder the actuator means and the switching means are sufficiently close together in the transverse direction of their relative movement that the actuator means and the switching means are co-operable to provide adjustment for weight; and

    a three-stage actuating means which includes at least one pivotal actuating lever and which in the first actuating stage pivots the holder into its second position, in the subsequent second actuating stage releases the locking action on the slide member, and in a third actuating stage shifts the slide member from one position into another position, the improvement comprising;

    the actuating means has only a single actuating lever which is manually movable in two different modes and first and second entrainment means, the first entrainment means urging the holder into the second position during the first actuating stage and the second entrainment means releasing the locking action on the slide member during the second actuating stage as the actuating lever is moved in one of said modes; and

    the actuating means includes a third entrainment means which is operative when the actuating lever is actuated in the other mode of actuation thereof in the third actuating phase so as to entrain the slide member to move it from one position to another.

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