Patents by Inventor Nils O. Hallstrom

Nils O. Hallstrom 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 of manufacturing an impeller assembly
    Patent number: 5593085
    Abstract: A method for determining the generation of a diffusion bond between two articles is disclosed. The two articles are sealed together to define a cavity therebetween. A vacuum is drawn in the cavity by means of an evacuation tube having a passageway. The passageway is then sealed and the articles are subjected to a temperature and pressure to diffusion bond the articles together. A successful diffusion bond can be determined if the evacuation tube sidewall is collapsed.
    Type: Grant
    Filed: March 22, 1995
    Date of Patent: January 14, 1997
    Assignee: Solar Turbines Incorporated
    Inventors: Henry J. Tohill, Russell B. Gallagher, Kenneth G. Kubarych, Nils O. Hallstrom