Patents by Inventor Henry Halldin

Henry Halldin 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).

  • Wheels having hard particles distributed in metallic tread
    Patent number: 4310191
    Abstract: The present invention relates to railbound vehicles equipped with wheels which include a rail-contacting wear layer made of a metallic material which has evenly distributed therein hard particles, such as carbides, oxides, borides or nitrides, for increasing the frictional characteristics of the wheel.
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: January 12, 1982
    Assignee: ASEA Aktiebolag
    Inventor: Henry Halldin
  • High pressure apparatus
    Patent number: 4140448
    Abstract: A high pressure apparatus for the manufacture of diamonds includes a pressure chamber formed of holes in annular, disc-like members arranged one after the other and a pair of opposed pressure-exerting members movable into the chamber formed by the holes with compressible gaskets arranged between adjacent disc-like members. The pressure exerting members are frusto-conical and the ends of the holes adjacent these members are similarly shaped.
    Type: Grant
    Filed: March 27, 1978
    Date of Patent: February 20, 1979
    Assignee: Scandiamant Aktiebolag
    Inventors: Bertram Brinkeborn, Henry Halldin, Hakan Lindqvist, Erik Lundblad, Kjell Nilsson, Pertti Syvakari