Patents by Inventor Ali Akbar Gharehaghaji

Ali Akbar Gharehaghaji 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).

  • Toughening of laminated composites by nanofiber yarn
    Patent number: 10814583
    Abstract: A method for enhancing fracture toughness of a composite laminate is disclosed. The method includes fabricating a nanofiber yarn, forming a nanofiber yarn layer by aligning the nanofiber yarn in form of a layer, forming a laminated structure by interleaving the nanofiber yarn layer into a plurality of fabric layers, forming the composite laminate by subjecting the laminated structure to a vacuum infusion process (VIP), and curing the composite laminate. Forming the laminated structure includes stacking a plurality of fabric layers onto each other and placing the nanofiber yarn layer between two fabric layers of the plurality of fabric layers. The VIP includes forming a sealed laminated structure by sealing the laminated structure, forming a vacuumed laminated structure by vacuuming the sealed laminated structure, and introducing a resin matrix into the vacuumed laminated structure.
    Type: Grant
    Filed: March 25, 2018
    Date of Patent: October 27, 2020
    Inventors: Elaheh Ahmadloo, Masoud Latifi, Ali Akbar Gharehaghaji, Hamed Saghafi
  • Sound absorbing structure including nanofibers
    Patent number: 10540952
    Abstract: Disclosed herein is a sound absorbing structure which includes at least one sound-permeable nanofiber layer and at least one sound absorbing layer; in which, the sound-permeable nanofiber layer is placed alongside of the sound absorbing layer.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: January 21, 2020
    Inventors: Maryam Mohammadi Gojani, Mohammad Amani Tehran, Ali Akbar Gharehaghaji
  • TOUGHENING OF LAMINATED COMPOSITES BY NANOFIBER YARN
    Publication number: 20180207905
    Abstract: A method for enhancing fracture toughness of a composite laminate is disclosed. The method includes fabricating a nanofiber yarn, forming a nanofiber yarn layer by aligning the nanofiber yarn in form of a layer, forming a laminated structure by interleaving the nanofiber yarn layer into a plurality of fabric layers, forming the composite laminate by subjecting the laminated structure to a vacuum infusion process (VIP), and curing the composite laminate. Forming the laminated structure includes stacking a plurality of fabric layers onto each other and placing the nanofiber yarn layer between two fabric layers of the plurality of fabric layers. The VIP includes forming a sealed laminated structure by sealing the laminated structure, forming a vacuumed laminated structure by vacuuming the sealed laminated structure, and introducing a resin matrix into the vacuumed laminated structure.
    Type: Application
    Filed: March 25, 2018
    Publication date: July 26, 2018
    Inventors: Elaheh Ahmadloo, Masoud Latifi, Ali Akbar Gharehaghaji, Hamed Saghafi
  • SOUND ABSORBING STRUCTURE INCLUDING NANOFIBERS
    Publication number: 20170200441
    Abstract: Disclosed herein is a sound absorbing structure which includes at least one sound-permeable nanofiber layer and at least one sound absorbing layer; in which, the sound-permeable nanofiber layer is placed alongside of the sound absorbing layer.
    Type: Application
    Filed: March 29, 2017
    Publication date: July 13, 2017
    Inventors: Maryam Mohammadi Gojani, Mohammad Amani Tehran, Ali Akbar Gharehaghaji