Patents by Inventor Christopher Rudolf

Christopher Rudolf 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).

  • Publication number: 20250389629
    Abstract: A method of laser-based high temperature mechanical property characterization comprising the steps of providing a mechanical test frame and chamber, loading a specimen in the mechanical test frame in the chamber, providing a laser, aligning the laser, sealing the chamber, evacuating 5 the chamber and optionally backfilling with a prescribed atmosphere, turning on the laser, applying mechanical loading to the specimen in the mechanical test frame, utilizing a load cell and a non-contact video extensometer, synchronizing the output of the load cell and non-contact video extensometer, and tracking the strain in the specimen. A device for laser-based high temperature mechanical property characterization comprising a vacuum chamber with a laser 10 transmissible window and viewing window, a vacuum pump, a uniaxial tensile system inside the vacuum chamber, a thermocouple inside the vacuum chamber, laser optics inside the vacuum chamber, a function generator, a laser source, an IR camera, and a video camera.
    Type: Application
    Filed: June 12, 2025
    Publication date: December 25, 2025
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Christopher Rudolf, Maurizio Manzo
  • Patent number: 12031954
    Abstract: A method of measuring millisecond-scale blast and impact characterization in soft materials includes embedding one or more sensors in soft material, wherein the one or more sensors have mechanical properties approximately matching the soft material; applying a constant current to the one or more sensors; subjecting the soft material to a shock or impact event; measuring a response as a change in voltage; and converting the measured voltage to strain or pressure.
    Type: Grant
    Filed: February 24, 2021
    Date of Patent: July 9, 2024
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventor: Christopher Rudolf
  • Patent number: 11609084
    Abstract: A system for mechanical testing a specimen includes a 3D printed mechanical testing fixture; a linear actuator having an axis of movement; a controller configured to control the linear actuator; two cameras; a data-acquisition system configured to acquire data from the linear actuator, the controller, and the two cameras; and the specimen. The specimen is marked in two locations with tracking markers to provide indication to the data acquisition system via at least one camera of movement and change in length of the specimen. The fixture includes force-sensing beams extending perpendicular to the axis of force.
    Type: Grant
    Filed: February 24, 2021
    Date of Patent: March 21, 2023
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Wonmo Kang, Christopher Rudolf
  • Publication number: 20210262783
    Abstract: A system for mechanical testing a specimen includes a 3D printed mechanical testing fixture; a linear actuator having an axis of movement; a controller configured to control the linear actuator; two cameras; a data-acquisition system configured to acquire data from the linear actuator, the controller, and the two cameras; and the specimen. The specimen is marked in two locations with tracking markers to provide indication to the data acquisition system via at least one camera of movement and change in length of the specimen.
    Type: Application
    Filed: February 24, 2021
    Publication date: August 26, 2021
    Inventors: Wonmo Kang, Christopher Rudolf
  • Publication number: 20210262909
    Abstract: A method of measuring millisecond-scale blast and impact characterization in soft materials includes embedding one or more sensors in soft material, wherein the one or more sensors have mechanical properties approximately matching the soft material; applying a constant current to the one or more sensors; subjecting the soft material to a shock or impact event; measuring a response as a change in voltage; and converting the measured voltage to strain or pressure.
    Type: Application
    Filed: February 24, 2021
    Publication date: August 26, 2021
    Inventor: Christopher Rudolf