Patents by Inventor Christopher J. Stelter

Christopher J. Stelter 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).

  • Devices and methods for additive manufacturing using flexible filaments
    Patent number: 10894353
    Abstract: A method of fabricating (printing) parts utilizing flexible filaments includes anchoring a portion of a flexible filament to a substrate. A length of flexible filament is extended over the substrate while the flexible filament is in tension to thereby avoid buckling of the flexible filament. The flexible filament may comprise a thermoplastic material and fibers or other reinforcing materials whereby composite 3D parts can be fabricated.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: January 19, 2021
    Assignee: UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF NASA
    Inventors: John M. Gardner, Christopher J. Stelter, Katherine A. Fotion, Jae-Woo Kim, Godfrey Sauti, Emilie J. Siochi
  • Adhesion test station in an extrusion apparatus and methods for using the same
    Patent number: 10500836
    Abstract: A method of controlling an additive fabrication process includes providing a primary substrate and a test substrate. Polymer test material is extruded onto the test substrate utilizing an extrusion head. The extrusion head is moved relative to the test substrate, and a force required to move the extrusion head relative to the test substrate is measured to thereby generate test data. A part is fabricated by extruding polymer material onto the primary substrate utilizing the extrusion head. The test data is utilized to control at least one process parameter associated with extruding polymer material onto the primary substrate.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: December 10, 2019
    Assignee: United States of America as represented by the Administrator of NASA
    Inventors: Godfrey Sauti, Jae-Woo Kim, Emilie J. Siochi, John M. Gardner, Christopher J. Stelter
  • Devices and Methods for Additive Manufacturing Using Flexible Filaments
    Publication number: 20170129171
    Abstract: A method of fabricating (printing) parts utilizing flexible filaments includes anchoring a portion of a flexible filament to a substrate. A length of flexible filament is extended over the substrate while the flexible filament is in tension to thereby avoid buckling of the flexible filament. The flexible filament may comprise a thermoplastic material and fibers or other reinforcing materials whereby composite 3D parts can be fabricated.
    Type: Application
    Filed: November 9, 2016
    Publication date: May 11, 2017
    Inventors: John M. Gardner, Christopher J. Stelter, Katherine A. Fotion, Jae-Woo Kim, Godfrey Sauti, Emilie J. Siochi
  • ADHESION TEST STATION IN AN EXTRUSION APPARATUS AND METHODS FOR USING THE SAME
    Publication number: 20170129186
    Abstract: A method of controlling an additive fabrication process includes providing a primary substrate and a test substrate. Polymer test material is extruded onto the test substrate utilizing an extrusion head. The extrusion head is moved relative to the test substrate, and a force required to move the extrusion head relative to the test substrate is measured to thereby generate test data. A part is fabricated by extruding polymer material onto the primary substrate utilizing the extrusion head. The test data is utilized to control at least one process parameter associated with extruding polymer material onto the primary substrate.
    Type: Application
    Filed: November 7, 2016
    Publication date: May 11, 2017
    Inventors: Godfrey Sauti, Jae-Woo Kim, Emilie J. Siochi, John M. Gardner, Christopher J. Stelter