Patents by Inventor Leif-Ake Bennstedt

Leif-Ake Bennstedt 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).

  • Apparatus for providing a surface coating on the wall in a cavity by means of electrolytic plating
    Patent number: 4227986
    Abstract: A method and apparatus for providing a surface coating of a metal or metal alloy on the wall of an elongate cavity in a workpiece by means of electrolytic plating, the workpiece being used as cathode. An electrolyte containing ions of the metal intended for the coating is brought into movement inside the cavity with the aid of a conveyor, which consists of a resilient and electrically insulating material such as a perforated, net-like or fibrous strip, and which is wound helically round the anode. The strip is fringed or slit on the edge facing towards the cavity wall to form outstanding resilient fingers which are in contact with the cavity wall.
    Type: Grant
    Filed: June 21, 1978
    Date of Patent: October 14, 1980
    Assignee: Wave Energy Development I Vastmanland Aktiebolag
    Inventors: Kaj-Ragnar Loqvist, Leif-Ake Bennstedt
  • Method for providing a surface coating on the wall in a cavity by means of electrolytic plating and the surface coating produced by the method
    Patent number: 4210497
    Abstract: A method and apparatus for providing a surface coating of a metal or metal alloy on the wall of an elongate cavity in a workpiece by means of electrolytic plating, the workpiece being used as cathode. An electrolyte containing ions of the metal intended for the coating is brought into movement inside the cavity with the aid of a conveyor, which consists of a resilient and electrically insulating material such as perforated, net-like or fibrous strip, and which is wound helically around the anode. The strip is fringed or slit on the edge facing towards the cavity wall to form outstanding resilient fingers which are in contact with the cavity wall.
    Type: Grant
    Filed: January 30, 1978
    Date of Patent: July 1, 1980
    Assignee: Wave Energy Development I Vastmanland Aktiebolag
    Inventors: Kaj-Ragnar Loqvist, Leif-Ake Bennstedt