Patents by Inventor Roy D. Paul

Roy D. Paul 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).

  • Polyester composite propeller spinner and method of making same
    Patent number: 4957415
    Abstract: A polyester composite propeller spinner (1) has a conical wall (2), radial internal support gussets (3), and means for attaching to a propeller hub. Improved impact strength is achieved by combining a vinyl terminated liquid reactive compound with a polyester resin and adding a plurality of fiberglass fibers. The fiberglass fibers are in at least two fiber lengths, having a 2:1 ratio of long to short fibers. A propeller spinner formed from such a composition has an impact strength of greater than 4.84 Kg-m (35 ft-lbs) .
    Type: Grant
    Filed: November 12, 1987
    Date of Patent: September 18, 1990
    Assignee: United Technologies Corporation
    Inventors: Roy D. Paul, deceased, Walter Pollock
  • Low pressure process for producing substantially voidless composites
    Patent number: 4197339
    Abstract: Filament-reinforced A-type PMR polyimide composites are prepared by mixing known monomers, applying the mixture as a matrix material to a plurality of the filaments, imidizing to obtain a prepolymer having a defined melt temperature range, heating the prepolymer to an addition polymerization temperature to effect cure, applying a pressure of 50-300 psi before reaching cure temperature and while in the melt temperature range, and maintaining said pressure while curing.
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: April 8, 1980
    Assignee: United Technologies Corporation
    Inventors: Roy D. Paul, Henry C. Winiarski