Patents by Inventor Shahriar Khosravani

Shahriar Khosravani 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).

  • Patent number: 10808749
    Abstract: A fastening device for coupling an assembly includes a fastener comprising a head, a threaded portion, and a shank extending between the head and the threaded portion. The fastening device also includes a coating formed around the fastener, wherein the coating is electrically conductive and comprises a varying thickness along the shank.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: October 20, 2020
    Assignee: The Boeing Company
    Inventors: Shahriar Khosravani, Darrin Michael Hansen, Blake A. Simpson, Junghyun Ahn
  • Patent number: 10739395
    Abstract: There is provided an LDE testing system. The system has a test chamber, a test article, and a capacitor to inject current into the test article, to create a spark, emitting a spark spectral signature, and having a spark light intensity. The system has a digitally-controlled reference light source operable to emit a reference light source spectral signature simulating an observed spark spectral signature of sparking in tested test articles, and having a reference light source light intensity equivalent to an observed spark light intensity. The system has a camera to capture an image of the spark spectral signature, spark light intensity, reference light source spectral signature, and reference light source light intensity, a controller to digitally control the digitally-controlled reference light source, and a computer system to receive the image from the camera, and determine a passing or failing result of an LDE testing criteria for the test article.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: August 11, 2020
    Assignee: The Boeing Company
    Inventor: Shahriar Khosravani
  • Patent number: 10739389
    Abstract: A method for measuring a contact resistance at an interface of an electrically conductive coating and a cross-ply surface of a composite layer having electrically conductive fibers. The method includes: placing a dielectric coating of a sensing pad in contact with the composite layer or with the electrically conductive coating on the cross-ply surface of the composite layer; electrically connecting first and second input terminals of a comparator to the sensing pad and to one side of a capacitor respectively; electrically connecting another side of the capacitor to a fixed resistance; electrically connecting the fixed resistance to an electrically conductive body inserted in a hole in the composite layer; supplying an alternating current to the electrically conductive body and to the fixed resistance; and outputting a characteristic voltage signal if an amplitude of the input signal at the first input terminal is at least equal to an amplitude of the input signal at the second input terminal.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: August 11, 2020
    Assignee: The Boeing Company
    Inventor: Shahriar Khosravani
  • Publication number: 20200217349
    Abstract: A conductive fastening system, a fastened assembly, and a method of fastening an assembly composed of layers of carbon fiber reinforced plastic (“CFRP”) and/or metallic material includes fasteners with an electrically conductive coating and electrically conductive gap filler materials between the fasteners and sidewalls of holes formed through the layers of the assembly. The sidewalls of the holes are coated with the electrically conductive gap filler material by abrading, injection or spraying. The fasteners with the electrically conductive coating are inserted through the holes. The conductive coating on the fasteners and electrically conductive gap filler material work together to enhance electrical conductivity between the fastener and assembly. The conductive coating also acts as a lubricant to reduce the amount of force required to insert the fastener into the hole thereby reducing damage to the assembly.
    Type: Application
    Filed: January 8, 2019
    Publication date: July 9, 2020
    Applicant: The Boeing Company
    Inventors: Darrin M. Hansen, Blake A. Simpson, Shahriar Khosravani
  • Publication number: 20200166554
    Abstract: A differential capacitive probe for measuring contact resistance, the differential capacitive probe including a frame, an end effector extending from the frame, a first capacitive pad coupled to the frame so as to at least partially circumscribe the end effector, and a second capacitive pad coupled to the frame so as to be radially spaced, relative to the end effector, from the first capacitive pad and to at least partially circumscribe the end effector, wherein a contact surface area of the first capacitive pad is substantially the same as another contact surface of the second capacitive pad.
    Type: Application
    Filed: November 28, 2018
    Publication date: May 28, 2020
    Inventor: Shahriar KHOSRAVANI
  • Patent number: 10640232
    Abstract: A conductive fastener system for connecting a composite structure to a support structure includes a composite structure hole that extends through the composite structure and shares a common axis with a support structure hole that extends at least partially through the support structure. A fastener comprising a shank having an outer surface passes through the composite structure hole and at least partially through the support structure hole and provides an annular space between the outer surface of the shank and the inner surface of the composite structure hole. The annular space is filled with a conductive paste that comprises conductive particles suspended in a bonding agent.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: May 5, 2020
    Assignee: The Boeing Company
    Inventor: Shahriar Khosravani
  • Patent number: 10603844
    Abstract: Apparatus and methods for injecting molten filler material into a hole. The method in accordance with one embodiment comprises: drilling a hole in a composite layer; heating filler material comprising an electrically conductive low-melting alloy to a molten state; inserting a nozzle having an internal channel system into the hole with a gap separating the nozzle and the hole; forcing molten filler material into, through and out of the internal channel system of the nozzle and into the gap; and retracting the nozzle from the hole. The nozzle may be rotary or not rotary.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: March 31, 2020
    Assignee: The Boeing Company
    Inventors: Shahriar Khosravani, Blake A. Simpson, Darrin M. Hansen, Mark J. DuFour
  • Publication number: 20200081051
    Abstract: There is provided an LDE testing system. The system has a test chamber, a test article, and a capacitor to inject current into the test article, to create a spark, emitting a spark spectral signature, and having a spark light intensity. The system has a digitally-controlled reference light source operable to emit a reference light source spectral signature simulating an observed spark spectral signature of sparking in tested test articles, and having a reference light source light intensity equivalent to an observed spark light intensity. The system has a camera to capture an image of the spark spectral signature, spark light intensity, reference light source spectral signature, and reference light source light intensity, a controller to digitally control the digitally-controlled reference light source, and a computer system to receive the image from the camera, and determine a passing or failing result of an LDE testing criteria for the test article.
    Type: Application
    Filed: September 12, 2018
    Publication date: March 12, 2020
    Inventor: Shahriar Khosravani
  • Publication number: 20200066417
    Abstract: A protective layer, a cell and a method provide radiation shielding. The cell and the protective layer formed of a plurality of cells provide radiation shielding, such as from protons and alpha particles having dangerously high energy levels, while being more lightweight than a conventional bulk HDPE protective layer. In the context of a protective layer, the protective layer includes a plurality of cells positioned proximate one another. The plurality of cells include at least a first cell. The first cell includes a cell body formed of an insulative material and extends between opposed first and second ends. The first cell also includes a conductive spherical portion proximate the first end of the cell body and an electrode disposed interior of the conductive spherical portion.
    Type: Application
    Filed: August 22, 2018
    Publication date: February 27, 2020
    Applicant: The Boeing Company
    Inventor: Shahriar KHOSRAVANI
  • Publication number: 20190375515
    Abstract: The present disclosure relates systems and methods for treating various materials, such as carbon fiber reinforced polymer (CFRP), with a Joule heating process so as to reduce or eliminate a risk of sparks or explosion due to lightning strikes. The disclosure also relates to an aircraft component with structures that have undergone a Joule heating process by way of the systems and methods described herein. An example method includes providing an electrode array having a first and second electrode set. Each of the electrode sets includes one or more disk-shaped electrodes that are arranged in an interdigitated, concentric stack about a central axis. The method also includes causing the electrode array to contact a conductive material. The method additionally includes causing a current source to provide electrical current through the first electrode set and the second electrode set so as to heat at least a portion of a conductive material.
    Type: Application
    Filed: June 11, 2018
    Publication date: December 12, 2019
    Inventor: Shahriar Khosravani
  • Publication number: 20190285109
    Abstract: A method for applying a coating on a surface of a lamination of plies of fiber-reinforced plastic material. The surface of the lamination includes exposed ends of reinforcement fibers. The method includes selecting an electrically conductive material that is abradable in a solid state by rubbing against the surface of the lamination having exposed ends of reinforcement fibers, and rubbing the electrically conductive material against the surface of the lamination to cause particles of electrically conductive material to be abraded and deposited on the surface of the lamination.
    Type: Application
    Filed: March 16, 2018
    Publication date: September 19, 2019
    Applicant: The Boeing Company
    Inventor: Shahriar Khosravani
  • Publication number: 20190285675
    Abstract: A method for measuring a contact resistance at an interface of an electrically conductive coating and a cross-ply surface of a composite layer having electrically conductive fibers. The method includes: placing a dielectric coating of a sensing pad in contact with the composite layer or with the electrically conductive coating on the cross-ply surface of the composite layer; electrically connecting first and second input terminals of a comparator to the sensing pad and to one side of a capacitor respectively; electrically connecting another side of the capacitor to a fixed resistance; electrically connecting the fixed resistance to an electrically conductive body inserted in a hole in the composite layer; supplying an alternating current to the electrically conductive body and to the fixed resistance; and outputting a characteristic voltage signal if an amplitude of the input signal at the first input terminal is at least equal to an amplitude of the input signal at the second input terminal.
    Type: Application
    Filed: March 16, 2018
    Publication date: September 19, 2019
    Applicant: The Boeing Company
    Inventor: Shahriar Khosravani
  • Patent number: 10317353
    Abstract: A non-destructive testing system includes a test article interface and a reference article interface. The test article interface includes a connector to couple to a metal component of an article under test (AUT) and a connector to couple to a carbon fiber composite component of the AUT. The reference article interface includes a connector to couple to a metal component of a reference article (REF) and a connector to couple to a carbon fiber composite component of the REF. The system also includes sensors to generate signals based on voltage and current thermoelectrically induced between the test article interface and the reference article interface, where the current and the voltage are based on a temperature difference between the AUT and the REF. The system also includes a processor to generate, based on the signals, an output indicating whether the AUT is expected to pass a lightning strike test.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: June 11, 2019
    Assignee: THE BOEING COMPANY
    Inventor: Shahriar Khosravani
  • Publication number: 20190111632
    Abstract: Apparatus and methods for injecting molten filler material into a hole. The method in accordance with one embodiment comprises: drilling a hole in a composite layer; heating filler material comprising an electrically conductive low-melting alloy to a molten state; inserting a nozzle having an internal channel system into the hole with a gap separating the nozzle and the hole; forcing molten filler material into, through and out of the internal channel system of the nozzle and into the gap; and retracting the nozzle from the hole. The nozzle may be rotary or not rotary.
    Type: Application
    Filed: October 18, 2017
    Publication date: April 18, 2019
    Applicant: The Boeing Company
    Inventors: Shahriar Khosravani, Blake A. Simpson, Darrin M. Hansen, Mark J. DuFour
  • Publication number: 20190063485
    Abstract: A fastening device for coupling an assembly includes a fastener comprising a head, a threaded portion, and a shank extending between the head and the threaded portion. The fastening device also includes a coating formed around the fastener, wherein the coating is electrically conductive and comprises a varying thickness along the shank.
    Type: Application
    Filed: August 25, 2017
    Publication date: February 28, 2019
    Inventors: Shahriar Khosravani, Darrin Michael Hansen, Blake A. Simpson, Junghyun Ahn
  • Publication number: 20180266974
    Abstract: A non-destructive testing system includes a test article interface and a reference article interface. The test article interface includes a connector to couple to a metal component of an article under test (AUT) and a connector to couple to a carbon fiber composite component of the AUT. The reference article interface includes a connector to couple to a metal component of a reference article (REF) and a connector to couple to a carbon fiber composite component of the REF. The system also includes sensors to generate signals based on voltage and current thermoelectrically induced between the test article interface and the reference article interface, where the current and the voltage are based on a temperature difference between the AUT and the REF. The system also includes a processor to generate, based on the signals, an output indicating whether the AUT is expected to pass a lightning strike test.
    Type: Application
    Filed: March 20, 2017
    Publication date: September 20, 2018
    Inventor: Shahriar Khosravani
  • Publication number: 20180170576
    Abstract: A conductive fastener system for connecting a composite structure to a support structure includes a composite structure hole that extends through the composite structure and shares a common axis with a support structure hole that extends at least partially through the support structure. A fastener comprising a shank having an outer surface passes through the composite structure hole and at least partially through the support structure hole and provides an annular space between the outer surface of the shank and the inner surface of the composite structure hole. The annular space is filled with a conductive paste that comprises conductive particles suspended in a bonding agent.
    Type: Application
    Filed: December 20, 2016
    Publication date: June 21, 2018
    Applicant: The Boeing Company
    Inventor: Shahriar Khosravani
  • Patent number: 9770873
    Abstract: A system and method for creating an optimized composite laminate structure containing a plurality of plies. The system has a processor and a memory, including an application interface. The application interface, when executed by the processor, is configured to operably: receive an input file having one or more of a maximum number of plies, design variables, material properties, and design constraints; determine an initial layup sequence defining parameters of a fiber orientation angle for each ply, and a total percentage of plies at a given fiber orientation angle; iteratively adjust the parameters, until an optimum set of parameters is obtained that achieves one or more predetermined margins of safety, and that achieves optimization of the composite laminate structure; and generate an output file for creating a layup, according to the parameters. The system further has a layup system for creating the optimized composite laminate structure.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: September 26, 2017
    Assignee: The Boeing Company
    Inventors: Anthony K. Gilbert, Omid B. Nakhjavani, Shahriar Khosravani, Mohammad Ali Heidari, James F. Ackermann, Mostafa Rassaian, Forouzan Behzadpour
  • Patent number: 9692523
    Abstract: Methods of digital communication utilizing entangled qubits are disclosed. The communication methods exploit selective entanglement swapping to transfer an entangled state between a sending device and a receiving device. Each device includes pairs of qubits that are independently entangled with pairs of qubits in the other device. By selectively entangling the qubits within a pair in the sending device, the qubits of the corresponding pair in the receiving device also are selectively entangled. When the qubits are entangled, they are projected onto a particular entangled state type. Though no information may be transferred through selective entanglement of one qubit pair, the disclosed methods determine whether a set of pairs of qubits are entangled by determining whether the distribution of pairs is a correlated or uncorrelated distribution (a probabilistic approach) and transform the distribution type to a classical bit of data to transfer classical bits in a qubit-efficient approach.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: June 27, 2017
    Assignee: The Boeing Company
    Inventors: Shawn Michael Smith, Claudio G. Parazzoli, Barbara A. Capron, Shahriar Khosravani, Michael C. Freebery
  • Patent number: 9669942
    Abstract: A fastener providing protection against damage to an aircraft resulting from lightning strikes includes an elongated shaft having a head disposed at an upper end thereof, one, the other, or both of the shaft and the head containing a circumferential groove disposed proximate an intersection of the shaft and the head, a lower surface of the head including a plurality of grooves extending radially outward from the circumferential groove and terminating at an outer periphery of the lower surface. A tubular sleeve is disposed concentrically about the shaft and has a plurality of through-slots disposed therein. Each through-slot has a lower end disposed above a lower end of the sleeve, and an upper end disposed in fluid communication with the circumferential groove, such that superheated gases and particles generated in interfaces between the fastener and the adjacent skin due to lightning strikes are vented harmlessly to the atmosphere through the channels and grooves.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: June 6, 2017
    Assignee: The Boeing Company
    Inventors: Shahriar Khosravani, Poh Soong Tang, Omid B. Nakhjavani, Hamid Jamshidiat, Darrin M. Hansen