Patents by Inventor S. H. Gothe Enkvist

S. H. Gothe Enkvist 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).

  • Method and apparatus for the production of bent tubes
    Patent number: 4722213
    Abstract: A bent tube is formed by passing a straight tube through a diameter-reducing die such that the central axis of the die forms an acute angle with the direction by which the tube is pulled through the die. The acute angle can be kept constant in order to produce a tube having a constant radius of curvature. Alternatively, the acute angle can be changed during the drawing process to form the tube with a radius of curvature which varies along the tube length.
    Type: Grant
    Filed: January 28, 1987
    Date of Patent: February 2, 1988
    Assignee: Santrade Ltd.
    Inventor: S. H. Gothe Enkvist