Patents by Inventor Klas Carlgren

Klas Carlgren 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).

  • Patent number: 6273389
    Abstract: A self-levelling apparatus for a seat comprises a base (21, 22, 27), a seat levelling assembly (2, 18, 19, 41) displaceably connected with the base, and a reversible electrical motor (40) disposed between the seat and the base for rotation of the seat levelling assembly around an axis about parallel with the base. The seat levelling assembly is disposed between the base and the axis. Themotor shaft (42) extends parallel with the axis and engages with a flexible actuation means, such as a roller chain, fixed at its one end at the base. The apparatus also comprises a positional detection means for control of the motor. The apparatus further comprises arcuate co-operating seat and base bearing elements (2; 22) of which at least one has a surface defined by rotation of a straight, curved or irregular line around the axis, such as a cylinder or cone segment surface.
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: August 14, 2001
    Assignee: Carlgrens Ergonomi AB
    Inventor: Klas Carlgren