Patents by Inventor Dilip M. Shah

Dilip M. Shah 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: 10760686
    Abstract: Aspects are directed to a tribological and creep resistant system configured to operate at temperature in excess of 750° C., comprising: a piston seal that includes a nickel base alloy, where the nickel base alloy includes a Ni3(Al,X) type precipitated phase in an amount greater than 40% by volume. Aspects are directed to a system comprising: a piston seal that includes a cobalt-based alloy. Aspects are directed to a method comprising: heat treating an ingot of a nickel base alloy that includes coarsening a precipitated phase to facilitate forging or wrought forming the ingot, machining the ingot to include a substantially flat surface, and processing the ingot to generate a piston seal.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: September 1, 2020
    Assignee: Raytheon Technologies Corporation
    Inventors: Dilip M. Shah, Pantcho Stoyanov, Chris Vargas
  • Patent number: 10752554
    Abstract: An intermetallic matrix composite has an intermetallic matrix and a ceramic reinforcement. The intermetallic matrix comprises, in atomic percent: 28.0±2.0 Nb; 27.0±2.0 Mo; 27.0±2.0 Cr; 9.0 ±2.0 Si; 9.0 ±2.0 Al; and no more than 10.0 other alloying elements and impurities, if any.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: August 25, 2020
    Assignee: Raytheon Technologies Corporation
    Inventors: Dilip M. Shah, Venkatarama K. Seetharaman
  • Patent number: 10682691
    Abstract: Shot sleeves for high temperature die casting include a low modulus single crystal nickel-based alloy having less than 1 ppm sulfur, a low modulus single crystal nickel-based alloy doped with a sulfur active element, a low modulus single crystal nickel-based alloy having a protective oxide coating, or a combination of two or more of the foregoing.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: June 16, 2020
    Assignee: RAYTHEON TECHNOLOGIES CORPORATION
    Inventors: John Joseph Marcin, Dilip M. Shah
  • Patent number: 10633760
    Abstract: A process for casting a single crystal axis-symmetric thick walled tube comprising forming a axisymmetric single crystal ring seed around a circular internal core, wherein the ring seed has an inner diameter and a taper on the inner diameter, and wherein the internal core has an outer diameter and a matching taper on the outer diameter, the matching taper matching the taper of the inner diameter of the ring seed, and the internal core being free to translate in a vertical direction relative to the ring seed; and heating the ring seed so as to expand the ring seed relative to the internal core, and allowing the circular internal core to translate relative to the ring seed in a direction of the force of gravity, thereby maintaining contact between the circular internal core and the ring seed.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: April 28, 2020
    Assignee: United Technologies Corporation
    Inventors: Steven J. Bullied, Ryan C. Breneman, Dilip M. Shah, Shiela R. Woodard
  • Publication number: 20200088040
    Abstract: A method for manufacturing a blade, the method includes casting a nickel alloy blade precursor having an airfoil and a root. The airfoil and the root are solution heat treating differently from each other. After the solution heat treating, the root is wrought processed. After the wrought processing, an exterior of the root is machined.
    Type: Application
    Filed: September 14, 2018
    Publication date: March 19, 2020
    Applicant: United Technologies Corporation
    Inventors: Dilip M. Shah, Alan D. Cetel, Venkatarama K. Seetharaman
  • Patent number: 10584608
    Abstract: A gas turbine engine includes a rotor that has a rotor disk and a plurality of circumferentially-spaced blades. The rotor disk and the blades are co-rotatable about an axis. A case circumscribes the rotor. The rotor disk is tuned, with regard to centrifugal and thermal growth responsiveness, to the case for a given operational scenario of the gas turbine engine such that the rotor disk and case together provide a tuned clearance response. The operational scenario involves a series of engine events that include at least two of engine acceleration, engine deceleration, engine steady-state operation.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: March 10, 2020
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventors: Frederick M. Schwarz, Dilip M. Shah
  • Patent number: 10576537
    Abstract: A casting mold has a pour cone, a downsprue, and a part-forming cavity having a lower end and an upper end. The downsprue extends from the pour cone toward the part-forming cavity and has: a lower portion having a plurality of ports in communication with the part-forming cavity; and an upper portion telescoping relative to the lower portion and coupling the lower portion to the pour cone.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: March 3, 2020
    Assignee: United Technologies Corporation
    Inventors: Steven J. Bullied, Dilip M. Shah, Alan D. Cetel, John J. Marcin, Jr.
  • Publication number: 20200024716
    Abstract: A process includes solution heat treating a nickel based superalloy with greater than about 40% by volume of gamma prime precipitate to dissolve the gamma prime precipitate in the nickel based superalloy; cooling the nickel based superalloy to about 85% of a solution temperature measured on an absolute scale to coarsen the gamma prime precipitate such that a precipitate structure is greater than about 0.7 micron size; and wrought processing the nickel based superalloy at a temperature below a recrystallization temperature of the nickel based superalloy. A material includes a nickel based superalloy with greater than about 40% by volume of gamma prime precipitate in which the precipitate structure is greater than about 0.7 micron size.
    Type: Application
    Filed: December 10, 2018
    Publication date: January 23, 2020
    Applicant: United Technologies Corporation
    Inventors: Dilip M. Shah, Alan D. Cetel, Venkatarama K. Seetharaman
  • Patent number: 10465545
    Abstract: Aspects of the disclosure are directed to a seal configured to interface with at least a first component and a second component of a gas turbine engine. A method for forming the seal includes obtaining an ingot of a fine grained, or a coarse grained, or a columnar grained or a single crystal material from a precipitation hardened nickel base superalloy containing at least 40% by volume of the precipitate of the form Ni3(Al, X), where X is a metallic or refractory element, and processing the ingot to generate a sheet of the material, where the sheet has a thickness within a range of 0.010 inches and 0.050 inches inclusive.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: November 5, 2019
    Assignee: United Technologies Corporation
    Inventors: Alan D. Cetel, Dilip M. Shah, Eric A. Hudson, Raymond Surace
  • Patent number: 10456830
    Abstract: An alloy part is cast in a mold (280) having a part-forming cavity (292, 294, 296). The method comprises pouring a first alloy into the mold. The pouring causes: a surface (550) of the first alloy in the part-forming cavity to raise relative to the part-forming cavity; a branch flow of the poured first alloy to pass upwardly through a first portion (304) of a passageway; and the branch flow to pass downwardly through a second portion (310), of the passageway; solidifying some of the first alloy in the passageway to block the passageway while at least some of the first alloy in the part-forming cavity remains molten. A second alloy is poured into the mold atop the first alloy and solidified.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: October 29, 2019
    Assignee: United Technologies Corporation
    Inventors: Steven J. Bullied, Dilip M. Shah, Alan D. Cetel, John J. Marcin
  • Publication number: 20190309438
    Abstract: A process for casting a single crystal axis-symmetric thick walled tube comprising forming a axisymmetric single crystal ring seed around a circular internal core, wherein the ring seed has an inner diameter and a taper on the inner diameter, and wherein the internal core has an outer diameter and a matching taper on the outer diameter, the matching taper matching the taper of the inner diameter of the ring seed, and the internal core being free to translate in a vertical direction relative to the ring seed; and heating the ring seed so as to expand the ring seed relative to the internal core, and allowing the circular internal core to translate relative to the ring seed in a direction of the force of gravity, thereby maintaining contact between the circular internal core and the ring seed.
    Type: Application
    Filed: April 5, 2018
    Publication date: October 10, 2019
    Applicant: United Technologies Corporation
    Inventors: Steven J. Bullied, Ryan C. Breneman, Dilip M. Shah, Shiela R. Woodard
  • Publication number: 20190299278
    Abstract: An example die casting system includes a die comprised of a plurality of die components that define a die cavity configured to receive a molten metal. One of the die components comprises a material that is not reactive with the molten metal and has a melting temperature above 815 degrees Celsius. The die casting system may be used in a method for die casting a gas turbine engine component.
    Type: Application
    Filed: April 15, 2019
    Publication date: October 3, 2019
    Inventors: Mario P. BOCHIECHIO, Dilip M. SHAH, Lea Kennard CASTLE, Douglas M. BERCZIK, John Joseph MARCIN, Carl R. VERNER
  • Publication number: 20190292920
    Abstract: A hollow turbine airfoil or a hollow turbine casting including a cooling passage partition. The cooling passage partition is formed from a single crystal grain structure nickel based super alloy, a cobalt based super alloy, a nickel-aluminum based alloy, or a coated refractory metal.
    Type: Application
    Filed: March 23, 2018
    Publication date: September 26, 2019
    Inventors: Dilip M. Shah, Alan D. Cetel, Venkatarama K. Seetharaman, Raymond Surace
  • Patent number: 10369625
    Abstract: A method for casting comprising: providing a seed, the seed characterized by: an arcuate form and a crystalline orientation progressively varying along an arc of the form; providing molten material; and cooling and solidifying the molten material so that a crystalline structure of the seed propagates into the solidifying material.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: August 6, 2019
    Assignee: United Technologies Corporation
    Inventors: Dilip M. Shah, Paul D. Genereux, Alan D. Cetel, John J. Marcin, Jr., Steven J. Bullied, Mario P. Bochiechio, Kevin W. Schlichting, Bradford A. Cowles, Carl R. Verner, David U. Furrer, Venkatarama K. Seetharaman
  • Publication number: 20190218919
    Abstract: A blade (60; 60-2) comprises an airfoil (61) and an attachment root (63). The blade has a tipward zone (80; 80-2; 80-2, 81) and a rootward zone (82; 82-2, 81; 82). The rootward zone has a single crystal structure. The tipward zone has a single crystal structure. The crystalline orientations of the rootward zone and tipward zone are at least 15° out of registry with each other.
    Type: Application
    Filed: March 22, 2019
    Publication date: July 18, 2019
    Applicant: United Technologies Corporation
    Inventors: John J. Marcin, JR., Steven J. Bullied, Dilip M. Shah, Alan D. Cetel
  • Patent number: 10352183
    Abstract: An embodiment of a turbine assembly includes, among other possible things, a first component including a first component surface, a second component including a second component surface spaced apart from the first component surface, and a brush seal disposed between the first component and the second component. The brush seal includes, among other things, a first bristled region extending in a first direction from a backing plate, and sealingly engaging one of the first component surface and the second component surface. At least one of the backing plate and the first bristled region includes a nickel-based superalloy material having at least 40% of a Ni3(Al,X) precipitate phase, X being a metallic or refractory element other than Al.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: July 16, 2019
    Assignee: United Technologies Corporation
    Inventors: Dilip M. Shah, Katelyn Kwoka, Alan D. Cetel, Venkatarama K. Seetharaman, Michael G. McCaffrey
  • Publication number: 20190194268
    Abstract: Multimeric defensin proteins (MD) containing at least two defensin peptides joined by a spacer peptide that is resistant to endoproteinase cleavage are disclosed along with compositions comprising the MD proteins and transgenic or genetically edited plants or microorganisms that express the MD to inhibit growth of pathogenic fungi. Such MD proteins, compositions, plants, and microorganisms can provide for improved inhibition of fungal growth when compared to a protein containing only one of the defensin peptides found in the MD.
    Type: Application
    Filed: March 10, 2017
    Publication date: June 27, 2019
    Inventors: Dilip M Shah, Siva linga sasanka Velivelli, Kazi Tariqul Islam
  • Patent number: 10315241
    Abstract: A method comprises: providing a spiral metallic workpiece having a cast structure associated with such spiral; and at least partially flattening the workpiece.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: June 11, 2019
    Assignee: United Technologies Corporation
    Inventors: Dilip M. Shah, Alan D. Cetel, John J. Marcin, Jr., Steven J. Bullied, Carl R. Verner
  • Publication number: 20190168296
    Abstract: A casting mold has a pour cone, a downsprue, and a part-forming cavity having a lower end and an upper end. The downsprue extends from the pour cone toward the part-forming cavity and has: a lower portion having a plurality of ports in communication with the part-forming cavity; and an upper portion telescoping relative to the lower portion and coupling the lower portion to the pour cone.
    Type: Application
    Filed: February 5, 2019
    Publication date: June 6, 2019
    Applicant: United Technologies Corporation
    Inventors: Steven J. Bullied, Dilip M. Shah, Alan D. Cetel, John J. Marcin, JR.
  • Patent number: 10301711
    Abstract: A process includes solution heat treating a nickel based superalloy with greater than about 40% by volume of gamma prime precipitate to dissolve the gamma prime precipitate in the nickel based superalloy; cooling the nickel based superalloy to about 85% of a solution temperature measured on an absolute scale to coarsen the gamma prime precipitate such that a precipitate structure is greater than about 0.7 micron size; and wrought processing the nickel based superalloy at a temperature below a recrystallization temperature of the nickel based superalloy. A material includes a nickel based superalloy with greater than about 40% by volume of gamma prime precipitate in which the precipitate structure is greater than about 0.7 micron size.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: May 28, 2019
    Assignee: United Technologies Corporation
    Inventors: Dilip M Shah, Alan D Cetel, Venkatarama K Seetharaman