Patents by Inventor Ellis C. Seal

Ellis C. Seal 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 for forming composite structures
    Patent number: 5403537
    Abstract: A method for producing advanced composite structures includes the assembly of a number of layers of fibrous reinforcements into a desired configuration. A vacuum is applied to the reinforcement in order to evacuate any air therefrom and to consolidate the plurality of fibrous reinforcements. Resin is introduced to the reinforcement by using a flow path therethrough having entry and exit points. The vacuum is used to transmit the resin through the reinforcement between the entry and exit points. The resin flows into the reinforcement due to the pressure differential between the evacuated reinforcement and the hydrostatic pressure on the resin as well as the capillary effect on the reinforcement.
    Type: Grant
    Filed: September 14, 1993
    Date of Patent: April 4, 1995
    Assignee: Martin Marietta Corporation
    Inventors: Ellis C. Seal, Michael G. Ferrell, Venu P. Bodepudi, Robert W. Biggs, Jr.