Patents by Inventor Fredrik K. Burmeister

Fredrik K. Burmeister 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).

  • Mattress construction for pneumatic mattress track system
    Patent number: 4762377
    Abstract: A mattress construction for a pneumatic mattress track system, through which the mattress can withstand higher pulling forces, the transmission between drive wheels and mattress be made more efficient and the whole system made lighter.
    Type: Grant
    Filed: December 4, 1986
    Date of Patent: August 9, 1988
    Inventor: Fredrik K. Burmeister
  • Pneumatic mattress track system for vehicles
    Patent number: 4715668
    Abstract: Pneumatic mattress track system to be used as a construction element in vehicles. A soft air filled mattress formed for instance by mattress bags (5) is automatically rolled out and serves as running surface and means of propulsion. The hull (1) of the system is disposed over the mattress on an air cushion (4) and thus without mechanical friction. The mattress formed for instance by the mattress bags (5) is not air tight and filled once, but it is filled automatically when it runs under the system hull (1) and is kept under constant pressure in the carrying position. The air for the mattress is supplied from the air cushion (4) through inlet orifices (7) provided in the wall of the mattress facing the hull (1). The main area of use is transport in difficult and vulnerable terrain.
    Type: Grant
    Filed: April 17, 1985
    Date of Patent: December 29, 1987
    Inventor: Fredrik K. Burmeister