Patents by Inventor Nils Lars Ove Kristensson

Nils Lars Ove Kristensson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Chair having a tiltable back-rest and two pivotal leg supports
    Patent number: 4039223
    Abstract: A chair, particularly a wheel-chair, having a spring biased tiltable back-rest and two pivotal leg supports including each a foot rest. The length of the leg supports from their pivot axis is automatically extended when the leg supports are swung to their horizontal position. The leg supports are provided with simple adjusting means to enable continuous adjustment of the length of the leg supports and with simple releasable means to lock and release the leg supports respectively in any angular or horizontal position.
    Type: Grant
    Filed: October 15, 1975
    Date of Patent: August 2, 1977
    Assignee: Landstingens Inkopscentral Lic, Ekonomisk Forening
    Inventor: Nils Lars Ove Kristensson
  • Chair with tiltable spring biased back-rest
    Patent number: 4004836
    Abstract: A wheel-chair having a spring biased tiltable back-rest. The resilient force exerted on the back-rest by the spring is continuously adjustable to suit the actual person sitting in the chair. Preferably, the spring is a gas spring which is combined with a device reducing the effect of the gas spring when the back-rest is in its upright position and adds to its effect when the back-rest is adjacent or in its horizontal position.
    Type: Grant
    Filed: October 15, 1975
    Date of Patent: January 25, 1977
    Assignee: Landstingens Inkopscentral Lic, Ekonomisk Forening
    Inventor: Nils Lars Ove Kristensson