Patents by Inventor Raja K. Mishra

Raja K. Mishra 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: 11132986
    Abstract: A panel assembly is formed by a plurality of bonds between two sheet materials in a face to face relationship to form a preform. The plurality of bonds define a closed perimeter region between the two sheet materials and an open perimeter region between the two sheet materials. The preform may be formed into a predefined shape. Pressurized fluid is applied through an inlet into the open perimeter region to expand the preform. The pressurized fluid expands the open perimeter region such that the two sheet materials expand in an opposing direction, thereby defining an expanded open perimeter region. The closed perimeter region between the two sheet materials remains vacant of the pressurized fluid such that the closed perimeter region is not expanded. The expanded open perimeter region is filled with a filler material for improving a performance characteristic of the panel assembly, e.g., strength, sound absorption, or stiffness.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: September 28, 2021
    Assignee: GM Global Technology Operations LLC
    Inventors: Anil K. Sachdev, Raja K. Mishra, Jon T. Carter, Tyson W. Brown, Blair E. Carlson, David R. Sigler, Robert N. Saje, Matthew P. Simonin
  • Publication number: 20210296027
    Abstract: A three-dimensional object may be manufactured using a powder bed fusion additive manufacturing technique. A layer of powder feed material may be distributed over a solid substrate and scanned with a high-energy laser beam to locally melt selective regions of the layer and form a pool of molten feed material. The pool of molten feed material may be exposed to gaseous nitrogen, carbon, or boron to respectively dissolve nitride, carbide, or boride ions into the pool of molten feed material to produce a molten nitrogen, carbon, or boron-containing solution. The molten nitrogen, carbon, or boron-containing solution may cool and solidify into a solid layer of fused nitride, carbide, or boride-containing material.
    Type: Application
    Filed: June 3, 2021
    Publication date: September 23, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Anil K Sachdev, Frederick E Pinkerton, Raja K Mishra, Tyson W Brown
  • Patent number: 11031161
    Abstract: A three-dimensional object made of a bulk nitride, carbide, or boride-containing material may be manufactured using a powder bed fusion additive manufacturing technique. A layer of powder feed material may be distributed over a solid substrate and scanned with a high-energy laser beam to locally melt selective regions of the layer and form a pool of molten feed material. The pool of molten feed material may be exposed to gaseous nitrogen, carbon, or boron to respectively dissolve nitride, carbide, or boride ions into the pool of molten feed material to produce a molten nitrogen, carbon, or boron-containing solution. The molten nitrogen, carbon, or boron-containing solution may cool and solidify into a solid layer of fused nitride, carbide, or boride-containing material. In one form, the three-dimensional object may comprise a permanent magnet made up of a plurality of solid layers of fused iron nitride material having a magnetic Fe16N2 phase.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: June 8, 2021
    Assignee: GM Global Technology Operations LLC
    Inventors: Anil K. Sachdev, Frederick E. Pinkerton, Raja K. Mishra, Tyson W. Brown
  • Publication number: 20200255928
    Abstract: An alloy composition is provided. The alloy composition includes silicon (Si) at a concentration of greater than or equal to about 0.55 wt. % to less than or equal to about 0.75 wt. %, magnesium (Mg) at a concentration of greater than or equal to about 0.55 wt. % to less than or equal to about 0.75 wt. %, chromium (Cr) at a concentration of greater than or equal to about 0.15 wt. % to less than or equal to about 0.3 wt. %, and a balance of the alloy composition being aluminum (Al). The alloy composition has an intermetallic phase content of less than or equal to about 3 wt. %. Methods of preparing the alloy composition and of processing the alloy composition are also provided.
    Type: Application
    Filed: February 8, 2019
    Publication date: August 13, 2020
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Arianna T. MORALES, Raja K. MISHRA, Anil K. SACHDEV
  • Publication number: 20190348202
    Abstract: A three-dimensional object made of a bulk nitride, carbide, or boride-containing material may be manufactured using a powder bed fusion additive manufacturing technique. A layer of powder feed material may be distributed over a solid substrate and scanned with a high-energy laser beam to locally melt selective regions of the layer and form a pool of molten feed material. The pool of molten feed material may be exposed to gaseous nitrogen, carbon, or boron to respectively dissolve nitride, carbide, or boride ions into the pool of molten feed material to produce a molten nitrogen, carbon, or boron-containing solution. The molten nitrogen, carbon, or boron-containing solution may cool and solidify into a solid layer of fused nitride, carbide, or boride-containing material. In one form, the three-dimensional object may comprise a permanent magnet made up of a plurality of solid layers of fused iron nitride material having a magnetic Fe16N2 phase.
    Type: Application
    Filed: May 11, 2018
    Publication date: November 14, 2019
    Inventors: Anil K. Sachdev, Frederick E. Pinkerton, Raja K. Mishra, Tyson W. Brown
  • Patent number: 10427209
    Abstract: A method of forming a part from a blank includes positioning the blank within a forming die. Water is introduced between the blank and the forming die. The water is heated to form steam between the blank and the forming die. The blank is reshaped within the forming die to form the part while the steam is disposed between the blank and the forming die. The steam forms a cushion between the blank and the forming die to reduce friction therebetween. A lubricant is not applied to the blank prior to being positioned in the forming die. Therefore, the formed part does not require a washing step after being formed.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: October 1, 2019
    Assignee: GM Global Technology Operations LLC
    Inventors: Arianna T. Morales, Raja K. Mishra
  • Patent number: 10384252
    Abstract: Methods suitable for forming complex parts from work-hardened sheet materials of limited formability are described. The formability of the work-hardened sheet is enhanced by forming at elevated temperature. The forming temperature is preferably selected to minimally undo the effects of work hardening so that the formed part is of higher strength than a like part formed from an annealed sheet. The method is applicable to age-hardening and non-age-hardening aluminum and magnesium alloys.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: August 20, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Anil K. Sachdev, John T. Carter, Raja K. Mishra, John E. Carsley
  • Publication number: 20190115004
    Abstract: A panel assembly is formed by a plurality of bonds between two sheet materials in a face to face relationship to form a preform. The plurality of bonds define a closed perimeter region between the two sheet materials and an open perimeter region between the two sheet materials. The preform may be formed into a predefined shape. Pressurized fluid is applied through an inlet into the open perimeter region to expand the preform. The pressurized fluid expands the open perimeter region such that the two sheet materials expand in an opposing direction, thereby defining an expanded open perimeter region. The closed perimeter region between the two sheet materials remains vacant of the pressurized fluid such that the closed perimeter region is not expanded. The expanded open perimeter region is filled with a filler material for improving a performance characteristic of the panel assembly, e.g., strength, sound absorption, or stiffness.
    Type: Application
    Filed: December 7, 2018
    Publication date: April 18, 2019
    Applicant: GM Global Technology Operations LLC
    Inventors: Anil K. Sachdev, Raja K. Mishra, Jon T. Carter, Tyson W. Brown, Blair E. Carlson, David R. Sigler, Robert N. Saje, Matthew P. Simonin
  • Patent number: 10189227
    Abstract: A panel assembly is formed by a plurality of bonds between two sheet materials in a face to face relationship to form a preform. The plurality of bonds define a closed perimeter region between the two sheet materials and an open perimeter region between the two sheet materials. The preform may be formed into a predefined shape. Pressurized fluid is applied through an inlet into the open perimeter region to expand the preform. The pressurized fluid expands the open perimeter region such that the two sheet materials expand in an opposing direction, thereby defining an expanded open perimeter region. The closed perimeter region between the two sheet materials remains vacant of the pressurized fluid such that the closed perimeter region is not expanded. The expanded open perimeter region is filled with a filler material for improving a performance characteristic of the panel assembly, e.g., strength, sound absorption, or stiffness.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: January 29, 2019
    Assignee: GM Global Technology Operations LLC
    Inventors: Anil K. Sachdev, Raja K. Mishra, Jon T. Carter, Tyson W. Brown, Blair E. Carlson, David R. Sigler, Robert N. Saje, Matthew P. Simonin
  • Publication number: 20180318909
    Abstract: A method of forming a part from a blank includes positioning the blank within a forming die. Water is introduced between the blank and the forming die. The water is heated to form steam between the blank and the forming die. The blank is reshaped within the forming die to form the part while the steam is disposed between the blank and the forming die. The steam forms a cushion between the blank and the forming die to reduce friction therebetween. A lubricant is not applied to the blank prior to being positioned in the forming die. Therefore, the formed part does not require a washing step after being formed.
    Type: Application
    Filed: May 2, 2017
    Publication date: November 8, 2018
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Arianna T. Morales, Raja K. Mishra
  • Publication number: 20170106625
    Abstract: A panel assembly is formed by a plurality of bonds between two sheet materials in a face to face relationship to form a preform. The plurality of bonds define a closed perimeter region between the two sheet materials and an open perimeter region between the two sheet materials. The preform may be formed into a predefined shape. Pressurized fluid is applied through an inlet into the open perimeter region to expand the preform. The pressurized fluid expands the open perimeter region such that the two sheet materials expand in an opposing direction, thereby defining an expanded open perimeter region. The closed perimeter region between the two sheet materials remains vacant of the pressurized fluid such that the closed perimeter region is not expanded. The expanded open perimeter region is filled with a filler material for improving a performance characteristic of the panel assembly, e.g., strength, sound absorption, or stiffness.
    Type: Application
    Filed: August 31, 2016
    Publication date: April 20, 2017
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Anil K. Sachdev, Raja K. Mishra, Jon T. Carter, Tyson W. Brown, Blair E. Carlson, David R. Sigler, Robert N. Saje, Matthew P. Simonin
  • Publication number: 20160339497
    Abstract: Methods suitable for forming complex parts from work-hardened sheet materials of limited formability are described. The formability of the work-hardened sheet is enhanced by forming at elevated temperature. The forming temperature is preferably selected to minimally undo the effects of work hardening so that the formed part is of higher strength than a like part formed from an annealed sheet. The method is applicable to age-hardening and non-age-hardening aluminum and magnesium alloys.
    Type: Application
    Filed: February 17, 2015
    Publication date: November 24, 2016
    Inventors: Anil K. Sachdev, John T. Carter, Raja K. Mishra, John E. Carsley
  • Patent number: 8677796
    Abstract: A hemming station is configured for hemming a panel assembly including an outer panel having a hem flange defined by a hem edge. The hemming station includes a roller configured to fold the hem flange, a heating device configured to heat the hem edge, and a control unit. The control unit is configured to control the roller and the heating device such that the roller folds the hem flange when the temperature of the hem edge is in a predetermined temperature range.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: March 25, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: John E. Carsley, Anil K. Sachdev, James C. O'Kane, Raja K Mishra, Rajesh Raghavan
  • Patent number: 8454078
    Abstract: One embodiment includes a lightweight automotive vehicle door construction including an inner panel partially formed from a lightweight metal casting. The casting provides a toe pan, hinge pillar and beltline. A lightweight stamping connected with the casting provides a remainder of the inner skin. The stamping provides an opposite pillar and latch mount. A header connected to the casting along a first end and with the beltline at a second end provides a window frame. A side intrusion beam extends between the hinge pillar and the opposite pillar. An outer panel is connected with the inner panel.
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: June 4, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Anil K. Sachdev, Chih-Cheng Hsu, Sooho Kim, Raja K Mishra
  • Patent number: 8361251
    Abstract: A magnesium alloy comprising up to about six weight percent zinc and up to about one weight percent cerium may be hot worked to produce an intermediate or final alloy workpiece that exhibits enhanced ductility and strength at room temperature. The addition of zinc and a small amount of cerium may affect the magnesium alloy by increasing strength and ductility, and improving the work hardening behavior.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: January 29, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Aihua A. Luo, Raja K Mishra, Anil K. Sachdev
  • Publication number: 20120214015
    Abstract: A hemming station is configured for hemming a panel assembly including an outer panel having a hem flange defined by a hem edge. The hemming station includes a roller configured to fold the hem flange, a heating device configured to heat the hem edge, and a control unit. The control unit is configured to control the roller and the heating device such that the roller folds the hem flange when the temperature of the hem edge is in a predetermined temperature range.
    Type: Application
    Filed: February 18, 2011
    Publication date: August 23, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: John E. Carsley, Anil K. Sachdev, James C. O'Kane, Raja K. Mishra, Rajesh Raghavan
  • Patent number: 8163113
    Abstract: A cast aluminum alloy containing up to about 0.35% by weight chromium is heated to a first elevated temperature to homogenize the casting and dissolve the chromium content in an aluminum-based matrix phase. The alloy is then heated at a lower elevated temperature to cause the precipitation of a portion of the chromium as an aluminum-containing and chromium-containing intermetallic compound. A suitable amount of chromium is retained in solid solution in aluminum. Thus, the concentration of dissolved chromium in an aluminum alloy may be controlled to fall within specified ranges which result in improvements in both the strength and ductility of the alloy. Impurity amounts of iron may also be precipitated as intermetallic particles from the aluminum matrix to enhance the ductility of the aluminum-based alloy.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: April 24, 2012
    Assignees: GM Global Technology Operations LLC, Queen's University at Kingston
    Inventors: Raja K. Mishra, Anil K. Sachdev, Shigeo Saimoto
  • Publication number: 20120049663
    Abstract: A method of forming a rotor of an electromagnetic device includes substantially filling a channel defined by a lamination stack and having a curvilinear cross-section with a slurry including a polymer and a plurality of permanent magnetic particles each having a magnetic moment, applying a magnetic field having a plurality of magnetic field lines arranged in a predetermined geometry to the slurry in situ within the channel to thereby align the magnetic moment of each permanent magnetic particle along the field, and curing the polymer to permanently align the magnetic moment of each permanent magnetic particle along the field and thereby dispose a permanent magnet within the channel to form the rotor, wherein the permanent magnet abuts the stack and substantially fills the channel whereby the channel is substantially free from an air gap between the stack and the permanent magnet. A rotor formed by the method is also disclosed.
    Type: Application
    Filed: September 1, 2010
    Publication date: March 1, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Raja K. Mishra, Thomas A. Perry, Anil K. Sachdev
  • Publication number: 20110113697
    Abstract: One embodiment includes a lightweight automotive vehicle door construction including an inner panel partially formed from a lightweight metal casting. The casting provides a toe pan, hinge pillar and beltline. A lightweight stamping connected with the casting provides a remainder of the inner skin. The stamping provides an opposite pillar and latch mount. A header connected to the casting along a first end and with the beltline at a second end provides a window frame. A side intrusion beam extends between the hinge pillar and the opposite pillar. An outer panel is connected with the inner panel.
    Type: Application
    Filed: November 17, 2009
    Publication date: May 19, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Anil K. Sachdev, Chih-Cheng Hsu, Sooho Kim, Raja K. Mishra
  • Publication number: 20100243113
    Abstract: A cast aluminum alloy containing up to about 0.35% by weight chromium is heated to a first elevated temperature to homogenize the casting and dissolve the chromium content in an aluminum-based matrix phase. The alloy is then heated at a lower elevated temperature to cause the precipitation of a portion of the chromium as an aluminum-containing and chromium-containing intermetallic compound. A suitable amount of chromium is retained in solid solution in aluminum. Thus, the concentration of dissolved chromium in an aluminum alloy may be controlled to fall within specified ranges which result in improvements in both the strength and ductility of the alloy. Impurity amounts of iron may also be precipitated as intermetallic particles from the aluminum matrix to enhance the ductility of the aluminum-based alloy.
    Type: Application
    Filed: March 31, 2009
    Publication date: September 30, 2010
    Applicants: GM GLOBAL TECHNOLOGY OPERATIONS, INC., QUEEN'S UNIVERSITY AT KINGSTON
    Inventors: Raja K. Mishra, Anil K. Sachdev, Shigeo Saimoto