Patents by Inventor Enar Hogfors

Enar Hogfors 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: 4175228
    Abstract: A method of hot bending a generally straight wire blank of a material being brittle in cold condition into a wire element having straight end portions and coils formed therebetween. According to the invention the rod blank is hot bent without a mandrel by clamping the end portions of the rod blank by means of two clamping jaws. The rod blank is heated to a softening temperature in the central wire portion which is to form the coils of the finished wire element, while the end portions are kept at a lower temperature. During the bending process at least one of the clamping jaws is brought along a movement path adapted to the desired coil formation.
    Type: Grant
    Filed: August 26, 1977
    Date of Patent: November 20, 1979
    Assignee: Bulten-Kanthal AB
    Inventors: Venanzio Bizzari, Enar Hogfors