Patents by Inventor Louis T. Feng

Louis T. Feng 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: 4006016
    Abstract: A process of forming powdered metal into finished or near-finished, high-strength, structural parts of complex configurations wherein a metal powder preform is heated to a temperature of approximately 2100.degree. F and formed at relatively low pressures in the range of approximately 19 to 39 tons per square inch over a short contact time interval in a preheated forming die composed of a high temperature, high strength superalloy to produce a metal part having a density of 99+% of theoretical density. The preform is formed from a prealloyed metal powder blended with graphite and a lubricant, compacted to a density in the range of 70 to 80% of theoretical density, and heat treated for oxide reduction and solutioning of the graphite therein. The preform must be rapidly transferred from the heat treatment operation to the preheated forming die to minimize reoxidation and cooling of the preform.
    Type: Grant
    Filed: July 23, 1975
    Date of Patent: February 1, 1977
    Assignee: Borg-Warner Corporation
    Inventors: John L. Zambrow, Rudolph M. Hempel, Louis T. Feng