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Vehicle seat which is adjustable in height and with automatic weight adjustment

  • US 5,058,852 A
  • Filed: 10/12/1990
  • Issued: 10/22/1991
  • Est. Priority Date: 08/09/1990
  • Status: Expired due to Term
First Claim
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1. A vehicle seat including a seat frame;

  • a base frame;

    a gas spring operatively arranged between the seat frame and the base frame;

    a valve means for adjusting the pressure in the gas spring in response to the weight of the seat occupant;

    an actuating member for actuating the valve means;

    a means for adjusting a desired seat height;

    a belt reel means disposed between the seat frame and the base frame, said belt reel means including a coupling means, said coupling means and said gas spring adapted to be subjected to the action of a pressure gas;

    a pressure source for supplying said pressure gas, said pressure source including a compressor and a drive motor for the compressor, said compressor and said drive motor being located on the vehicle seat, wherein said valve means comprises;

    an electromagnetically actuable 2/2-way valve, which serves only for the release of gas from the gas spring and an electromagnetically actuable 3/2-way valve located between said pressure source and the coupling means of the belt reel means; and

    an electronic control circuit having outputs for connection to respective ones of said valves, inputs for a seat level switch, an up/down setting switch and a seat contact switch respectively, an output for connection to the drive motor for the compressor, a microprocessor, an input circuit means between the microprocessor and said inputs of the control circuit and output stages between the microprocessor and respective ones of said valves.

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