Abstract: The invention provides a support unit for drivers' cabs which actively compensates for any relative movement between chassis and cab by providing at least one support cylinder which is axially rigidly mounted on the chassis with its support piston and flexibly supported on the cab by its cylinder, the cylinder forming a movement-producing unit with a directional control valve whose body alternately connects the front side of the support piston to the pressure side of a constant-pressure circuit or to a non-pressurized outlet and is attached to the cab.

Abstract: A utility vehicle with a self-contained driver compartment and with spring and damping elements by which the driver compartment is elastically supported on the rest of the vehicle mass. Located centrally between the driver compartment and the rest of the vehicle there is provided a guide arrangement which guides the driver compartment in all its motions relative to the rest of the vehicle and which consists of a vertical guide as well as two rotating guides coupled with it, their pivot axes being in the vehicle's longitudinal direction and transverse to it.

Abstract: A ski having extra weights stationarily disposed adjacent the longitudinal ends thereof and being interchangeably and detachably fixed in their respective positions. A base plate is secured to the ski, the extra weight set thereon, and a covering weight head is secured over the extra weight to the base plate through an anchoring bolt.

Abstract: A ratchet transmission for height and weight adjustment of suspension seats of vehicles having two independent gear-shift-lever shafts rotatably disposed about a common axis within a gear casing, a pair of ratchet wheels being respectively rigidly fixed on the gear-shift-lever shafts, a cam disc abutted by the gear casing and swivelable around the axis of the gear-shift-lever shafts, a pair of counteracting and pre-tensioned pawls for each of the ratchet wheels which are selectively latchable thereto by turning the cam disc, a guide system for leading the vehicle seat in a straight line and a spring component, including an elevating screw turnable by one of the gear-shift-lever shafts, a roving nut and a compressed spring, the spring component being adjustable as a whole for, free of tension, the purpose of height adjustments, through one of the gear-shift-lever shafts, and the compressible spring being pre-tensioned through the other of the gear-shift-lever shafts, by axially moving the roving nut, which for

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.