Patents by Inventor Lars Erik Gustavsson

Lars Erik Gustavsson 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: 4398481
    Abstract: A frame of a needle bar mechanism is mounted in a sewing machine arm and supports the swingable needle bar holder to enable zigzag motion of the needle. A stepping motor is mounted in the frame and connected by a link from the shaft of the motor to the needle bar holder. The motor is controlled by stitch codes supplied by 8 amplifier circuits and automatic control devices. The link is formed so that the driving arrangement can be calibrated and an elastic engagement is provided between the motor shaft and the needle bar holder. The transfer distance through only one link is short so the friction loss is small. This, in combination with a small holding torque of the needle bar, restricts the dimension of the stepping motor.
    Type: Grant
    Filed: July 23, 1981
    Date of Patent: August 16, 1983
    Assignee: Husqvarna Aktiebolag
    Inventor: Lars-Erik Gustavsson
  • Patent number: D247544
    Type: Grant
    Filed: April 14, 1976
    Date of Patent: March 21, 1978
    Assignee: El-Varmeprodukter Jan Lans AB
    Inventor: Lars Erik Gustavsson