The invention relates to an adjustable damping system for a vehicle seat for damping vibrations of a seat-part-side upper part relative to a body-side lower part in at least one spatial direction (X, Y, Z), at least one damping element, arranged between the seat-part-side upper part and the body-side lower part and adjustable by an adjustment device, being provided for the damping. The damping system is further distinguished in that at least one relative movement variable and a change in the relative movement variable of the seat-part-side upper part relative to the body-side lower part can be determined by a sensor device, and a first damping force of the damping element can be adjusted by the adjustment device as a function of the at least one relative movement variable and the frequency of the change in the relative movement variable.

A pneumatic seat support by itself supports a seat above a floor of a vehicle. The pneumatic seat support has upper and lower air chambers. The lower air chamber is a rigid cylindrical tube. The upper air chamber is a flexible cylindrical bellows, with a diameter greater than the diameter of the tube. Three or more linear shafts extending through the upper air chamber and into the lower air chamber provide a single-degree-of-freedom bearing support structure that allows vertical motion of the seat but withstands horizontal loads on the seat. When the seat moves vertically downward, it compresses air in both chambers, providing a seat support system with a natural oscillation frequency which is less than 2.4 Hz, and preferably in the range of 1.5-2.2 Hz.

A seat support mechanism including a lifter, and configured to perform a cushion frame suspension function no matter to what height a cushion frame is adjusted. Torsion bars extending in the width direction of a cushion frame and elastically supporting the cushion frame are supported by a link mechanism disposed between sliders and the cushion frame. Even if the attitude of the link mechanism is displaced when the lifter adjusts the height, the positions of the torsion bars are displaced so as to follow the displacement. The torsion bars elastically support the cushion frame no matter to what height the torsion bars are displaced. Thus, no matter to what height the cushion frame is adjusted, the torsion bars are able to support the cushion frame with predetermined elasticity and to exhibit predetermined vibration absorption characteristics.

The invention relates to a vehicle seat comprising a backrest portion and a seating surface portion, each of which is arranged to be connected with a seat base portion, wherein the backrest portion is resiliently arranged and supported to be able to swivel with respect to the seat base portion, and wherein the seating surface portion is arranged to be able to move in at least a longitudinal direction of the seat frontwards and rearwards with respect to the seat base portion, wherein the backrest portion and the seating surface portion are operatively connected together via a first lever arrangement in such a way that the seating surface portion is able to move rearwards in the longitudinal direction of the seat when the backrest portion makes a suspending movement with respect to the seat base portion in a direction away from the seating surface portion.

A control device controls a vehicle including a seat suspension which is provided between a chassis and a seat of the vehicle and restricts vibration and of which each of a spring constant and a damping coefficient is changeable and controllable. The control device detects, as vehicle information, a vehicle speed, an acceleration, a state of acceleration operation by a driver, a state of deceleration operation by the driver, and a state of steering by the driver. The control device determines, based on the vehicle information, whether the driver has driving preference of emphasizing the steering stability performance of the vehicle or driving preference of emphasizing the ride comfort performance of the vehicle, and, according to the determined driving preference, changes an acceleration of the seat by controlling the seat suspension.

A child safety seat includes a seat body, a headrest, a headrest adjusting mechanism, and a harness component. A seat space is defined on the seat body. The headrest is movably disposed on a front side of the seat body facing the seat space. The headrest adjusting mechanism is for allowing the headrest to move relative to the seat body or restraining the headrest from moving relative to the seat body. The harness component includes a first part and a second part. The first part at least partially is received between the headrest adjusting mechanism and the seat body. The second part is connected to the first part and exposed out of the headrest toward the seat space.

The invention relates to an adjustable damping system for a vehicle seat for damping a movement of the seat part-side upper part relative to the body-side lower part in at least one spatial direction, wherein, for damping, at least one damping element is provided, which is adjustable by an adjustment device and is arranged between the seat part-side upper part and the body-side lower part. The damping system is further distinguished in that a first damping force of the damping element is settable by the adjustment device, wherein this first damping force can be determined by the adjustment device, with the aid of a total damping travel of the damping element, a basic damping force presettable by a damping setting device, a position of the seat part-side upper part, measurable by a sensor device, relative to the body-side lower part and a movement direction of the seat part-side upper part relative to the body-side lower part, wherein the movement direction can be determined from at least two temporally consecutive positions of the seat part-side upper part, measurable by the sensor device, relative to the body-side lower part.

Suspension systems and grounds maintenance vehicles incorporating the same are disclosed. The suspension system may include biasing elements or springs that may be adjusted to vary the preload and thus change the spring and dampening characteristics of the suspension system. In some embodiments, the system may include an adjustment mechanism that permits simultaneous adjustment of two springs via a single action. In other embodiments, features adapted to assist an operator with mounting/dismounting the vehicle are disclosed.

The invention relates to a suspension device, in particular for a vehicle seat, comprising an upper suspension part and a lower suspension part, which can be connected to one another by a first swivelling connector and a second swivelling connector, wherein a first spring unit can be connected in a first end region on the one hand by means of an adjusting device to the first swivelling connector and can be connected in a second end region on the other hand to the lower suspension part, wherein by means of the adjusting device the position of the first spring unit can be adjusted in order to adjust the spring force and the spring rate of the suspension device.

A vehicle seat operation feedback and control system with a seat and an electronic display screen and a processor configured to receive a signal from the seat corresponding to an inoperable, almost inoperable, or undesired condition and provide feedback on the display screen of the inoperable, almost inoperable, or undesired condition.