Pneumatic motor vehicle seat with stabilized static height
First Claim
1. A motor vehicle seat supported to vibrate by means of a mechanical vibration system and a pneumatic springwherein static height is held constant automatically independently of the weight of the respective seat occupant wherein said mechanical vibration system actuates an aerating valve or a deaerating valve for lowering or raising said pneumatic spring independent of the vibration travel by means of a control system wherein the deaerating valve is opened by a vibration travel exceeding the static height, and the acrating valve is opened by a vibration travel falling below the static height, and that said valves are closed after reversal of the respective vibration travel and before the static height is reached, wherein the distance between vibration travel switching positions and the static height when the valves are closed is shorter than the distance between the vibration travel switching positions and the static height when the valves are opened to provide a trailing distance for holding the valves in the open position, wherein the valves each comprise a stopping device (23, 24) that lifts off of a valve seat (25, 26) for opening the valve against the force of a closing spring (27, 28), wherein the stopping device (23, 24) consists of a ferromagnetic material and is disposed in a plastic valve housing, and the control system for opening the valves consists of a control lever (18) or a control carriage with a permanent magnet (22) which approaches the stopping device of the aerating valve (24/26) or the stopping device of the deaerating valve (23/25) in a non-contacting manner dependent on the vibration travel in such a way that the respective stopping device (23, 24) in the valve open position is a non-contacting distance from the permanent magnet which is shorter than the total valve height because the valve in the open position is closer to the permanent magnet (22) due to the lift off motion of the stopping device from its valve seat.
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Accused Products
Abstract
A pneumatic motor vehicle seat, whose static height is held constant independently of the weight of the respective seat occupant. The inventive device provides a magnetically actuated air valve (16) which is enclosed 20 in a plastic valve housing for aerating and deaerating the pneumatic valve. The air valve is controlled by an external permanent magnet and according operates, quietly, cleanly and with little wear. Also a motor vehicle seat includes an integrated height adjustment mechanism, comprising a control system which automatically and simultaneously dampens the vehicle seat vibrations to a maximum, whilst the static height is being adjusted.
67 Citations
6 Claims
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1. A motor vehicle seat supported to vibrate by means of a mechanical vibration system and a pneumatic spring
wherein static height is held constant automatically independently of the weight of the respective seat occupant wherein said mechanical vibration system actuates an aerating valve or a deaerating valve for lowering or raising said pneumatic spring independent of the vibration travel by means of a control system wherein the deaerating valve is opened by a vibration travel exceeding the static height, and the acrating valve is opened by a vibration travel falling below the static height, and that said valves are closed after reversal of the respective vibration travel and before the static height is reached, wherein the distance between vibration travel switching positions and the static height when the valves are closed is shorter than the distance between the vibration travel switching positions and the static height when the valves are opened to provide a trailing distance for holding the valves in the open position, wherein the valves each comprise a stopping device (23, 24) that lifts off of a valve seat (25, 26) for opening the valve against the force of a closing spring (27, 28), wherein the stopping device (23, 24) consists of a ferromagnetic material and is disposed in a plastic valve housing, and the control system for opening the valves consists of a control lever (18) or a control carriage with a permanent magnet (22) which approaches the stopping device of the aerating valve (24/26) or the stopping device of the deaerating valve (23/25) in a non-contacting manner dependent on the vibration travel in such a way that the respective stopping device (23, 24) in the valve open position is a non-contacting distance from the permanent magnet which is shorter than the total valve height because the valve in the open position is closer to the permanent magnet (22) due to the lift off motion of the stopping device from its valve seat.
Specification