Patents by Inventor Jafar Razmi

Jafar Razmi 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).

  • Mechanical test fixture with submicron tolerance
    Patent number: 8096191
    Abstract: The mechanical test apparatus is a fixture utilizing capacitive gauge sensors, located in close proximity to a test specimen, to measure strain in miniature specimens. The upper collar is connected to the upper bolt which is connected to the cross head of the mechanical test machine and the lower collar is attached to the lower bolt which is attached to the load cell. The collars contain conductive target plates and capacitive gauge sensors oriented to form the two plate electrodes of a capacitor. These plates are precisely positioned and move as a mechanical test is performed. The measured voltage is proportional to the distance between the plates, thus allowing the strain to be calculated. The system can be configured to perform tensile, compression, and bending tests at submicron tolerances.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: January 17, 2012
    Assignee: Utah State University
    Inventors: Leila J Ladani, Jafar Razmi, Jason M Carter
  • Mechanical Test Fixture With Submicron Tolerance
    Publication number: 20110100133
    Abstract: The mechanical test apparatus is a fixture utilizing capacitive gauge sensors, located in close proximity to a test specimen, to measure strain in miniature specimens. The upper collar is connected to the upper bolt which is connected to the cross head of the mechanical test machine and the lower collar is attached to the lower bolt which is attached to the load cell. The collars contain conductive target plates and capacitive gauge sensors oriented to form the two plate electrodes of a capacitor. These plates are precisely positioned and move as a mechanical test is performed. The measured voltage is proportional to the distance between the plates, thus allowing the strain to be calculated. The system can be configured to perform tensile, compression, and bending tests at submicron tolerances.
    Type: Application
    Filed: November 3, 2009
    Publication date: May 5, 2011
    Applicant: Utah State University
    Inventors: Leila J. Ladani, Jafar Razmi, Jason M. Carter