Patents by Inventor Kerang Ken Han

Kerang Ken Han 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).

  • Double-chamber vacuum resin transfer molding
    Patent number: 6299819
    Abstract: A double chamber vacuum resin transfer molding process is provided comprising the initial step of providing a double chamber vacuum resin transfer molding apparatus comprising a first mold portion and a second mold portion. The first mold portion and the second mold portion are configured such that, in an engaged state, the first mold portion and the second mold portion define a mold cavity and a brim cavity. The mold cavity is isolated from the brim cavity by a compressible seal. Either or both of the first mold portion and the second mold portion are further configured to define an injection gate in communication with the mold cavity, a mold cavity vacuum port in communication with the mold cavity, and a brim cavity vacuum port in communication with the brim cavity. The first mold portion, the second mold portion, and the compressible seal are arranged such that a decrease in brim cavity pressure below atmospheric pressure causes a corresponding decrease in mold cavity volume.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: October 9, 2001
    Assignee: The University of Dayton
    Inventor: Kerang Ken Han