Patents by Inventor David R. Angst

David R. Angst 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).

  • Utilization of blow molding tooling manufactured by sterolithography for rapid container prototyping
    Patent number: 5458825
    Abstract: A method for producing a prototype of an article includes generating a data file utilizing a computer aided design apparatus to provide data representing all of the geometry and contours for the inner cavity of the mold required to mold the article, using the data file to create the mold as a physical object directly from photosensitive resin utilizing a stereolithographic apparatus whereby the mold which is created utilizing the stereolithographic apparatus has a mold cavity having the geometry and contours required to blow mold the prototype of the article, positioning the mold in the blow molding apparatus, introducing a preform into the mold; and expanding the preform against the surface of the inner cavity of the mold to produce the prototype of the article.
    Type: Grant
    Filed: October 14, 1994
    Date of Patent: October 17, 1995
    Assignee: Hoover Universal, Inc.
    Inventors: Cory P. Grolman, David R. Angst, Kevin D. Gaydosh
  • High transformation temperature shape memory alloy
    Patent number: 5114504
    Abstract: A high temperature titanium-based shaped memory alloy contains from at least 0.1 at. % hafnium. Articles formed from the disclosed alloy have high transformation temperatures. The alloy of the invention can be successfully hot and cold worked to make articles such as springs and wires.
    Type: Grant
    Filed: November 5, 1990
    Date of Patent: May 19, 1992
    Assignee: Johnson Service Company
    Inventors: David N. AbuJudom, II, Paul E. Thoma, Ming-Yuan Kao, David R. Angst