Patents by Inventor Bernard J. Wrona

Bernard J. Wrona 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 fabricating coolable ceramic structures
    Patent number: 5139716
    Abstract: Coolant passages (14) of non-machinable size and shape are formed in a ceramic body (10) by individually forming sections (16) of the body (10), embedding graphite (20) therein during preforming, assembling the sections (16) into a complete preform (11), integrating the preform (24) by densifying it in an inert atmosphere under heat and pressure, and then heating the densified preform (10) in air to vaporize the graphite (19,20). In another aspect of the invention, a ceramic body (32) is formed from a three-dimensional, filled-in weave of silica fibers (30) in which the fibers (34) extending in one of the three dimensions are graphite and are subsequently vaporized.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: August 18, 1992
    Assignee: Loral Aerospace Corp.
    Inventors: Bernard J. Wrona, David G. Paquette