Patents by Inventor Leonardo Ajdelsztajn
Leonardo Ajdelsztajn 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).
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Patent number: 9611391Abstract: One aspect of the present invention includes an article. The article includes a substrate and a coating disposed on the substrate, wherein the coating includes a plurality of cermet particles bonded along their prior particle boundaries. The plurality of cermet particles have a median particle size less than about 5 microns and less than 25 percent of the plurality of cermet particles include melted and re-solidified particles. Gate valves are also presented.Type: GrantFiled: March 3, 2014Date of Patent: April 4, 2017Assignee: General Electric CompanyInventors: Leonardo Ajdelsztajn, James Anthony Ruud, Dennis Michael Gray
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Patent number: 9598774Abstract: Briefly, in one embodiment, a method is disclosed. The method includes introducing a powder feedstock into a cold-spray apparatus, and operating the cold-spray apparatus to deposit the feedstock. The feedstock includes particles including nickel-base alloy having a thermally altered microstructure.Type: GrantFiled: December 16, 2011Date of Patent: March 21, 2017Assignee: General Electric CorporationInventors: Leonardo Ajdelsztajn, Timothy Hanlon
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Patent number: 9328918Abstract: Different types of apparatus for fabricating a deposit, method of deposition and an article are presented. The apparatus include a thermal spray gun comprising a combustion chamber, combustion zone, an air injection port, a fuel injection port, a nozzle and a liquid injection port. The combustion zone exists between the inlet side and outlet side of the combustion chamber. The method includes, among other things, providing a fuel and an oxidizer inside the combustion zone, initiating combustion inside the combustion zone, and directing products of the combustion toward the outlet side to create a combustion product stream. The method also includes introducing a feedstock mixture comprising a feedstock material and a liquid into the combustion product stream to create an entrained feedstock stream, and expelling the entrained feedstock stream from the spray gun through a nozzle to form a deposit on a surface of the article.Type: GrantFiled: May 28, 2010Date of Patent: May 3, 2016Assignee: General Electric CompanyInventors: Leonardo Ajdelsztajn, James Anthony Ruud
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Publication number: 20160031186Abstract: Coatings for substrates, such as superalloy substrates, are provided. The coating can include: 15 wt % to 45 wt % cobalt; 20 wt % to 40 wt % chromium; 2 wt % to 15 wt % aluminum; 0.1 wt % to 1 wt % yttrium; and nickel. The coatings may include nickel, cobalt, chromium and aluminum, and other optional additives to improve oxidation and corrosion resistance of the substrate without significant debit to its mechanical properties.Type: ApplicationFiled: March 12, 2014Publication date: February 4, 2016Inventors: David Paul MOURER, Leonardo AJDELSZTAJN, Kenneth Rees BAIN, Andrew Joseph DETOR, Andrew William EMGE, James Anthony RUUD, Michael James WEIMER
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Publication number: 20150147621Abstract: A method for preparing an electrolyte separator for an electrochemical device is described. The method includes the step of applying a beta?-alumina coating composition, or a precursor thereof, to a porous substrate, by an atmospheric, thermal spray technique. An electrochemical device is also described. Some of these devices include an anode, a cathode, and an electrolyte separator disposed between the anode and the cathode. The separator includes a thermally-sprayed layer of beta?-alumina, disposed on a porous substrate. The electrochemical device can be used as an energy storage system, or for other types of end uses.Type: ApplicationFiled: November 26, 2013Publication date: May 28, 2015Applicant: General Electric CompanyInventors: Todd Michael Striker, Richard Louis Hart, Matthew Joseph Alinger, Leonardo Ajdelsztajn
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Publication number: 20150147479Abstract: A method for the formation of channels on a metallic substrate is described. The method includes the steps of applying at least one layer of a metallic coating material onto a surface of the substrate by a cold spray technique, so as to define boundary walls for the channels, and to build the boundary walls to a desired height. Additional coating material is then applied on one or more surfaces of the boundary walls by the cold spray technique, so as to modify the shape of the channels. The substrate can be any type of high-temperature component or hot gas path component. In some instances, the substrate is a gas turbine engine wall.Type: ApplicationFiled: November 22, 2013Publication date: May 28, 2015Applicant: General Electric CompanyInventors: Ronald Scott Bunker, Luc Stephane Leblanc, Leonardo Ajdelsztajn
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Publication number: 20140175318Abstract: One aspect of the present invention includes an article. The article includes a substrate and a coating disposed on the substrate, wherein the coating includes a plurality of cermet particles bonded along their prior particle boundaries. The plurality of cermet particles have a median particle size less than about 5 microns and less than 25 percent of the plurality of cermet particles include melted and re-solidified particles. Gate valves are also presented.Type: ApplicationFiled: March 3, 2014Publication date: June 26, 2014Applicant: General Electric CompanyInventors: Leonardo Ajdelsztajn, James Anthony Ruud, Dennis Michael Gray
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Patent number: 8689886Abstract: A gate valve has a body, the body having a cavity and a flow passage intersecting the cavity. A seat is mounted to the body at the intersection of the flow passage and the cavity. A gate is installed at the cavity and has an engaging face that slidingly engages the seat while the gate is being moved between open and closed positions. The end faces between a seat pocket and the seat are hard-coated and smooth-finished to provide sealing when mated. The hardcoated pocket and seat sealing surfaces extend the life of the valve by eliminating the need for an elastomeric seal of limited life.Type: GrantFiled: June 20, 2011Date of Patent: April 8, 2014Assignee: Vetco Gray Inc.Inventors: Christopher E. Wolfe, Dennis Gray, Leonardo Ajdelsztajn
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Patent number: 8591986Abstract: A method of forming a deposit using a cold spray apparatus is disclosed. The method includes introducing a powder feedstock into a cold spray apparatus, and operating the cold spray apparatus to deposit the feedstock. The feedstock includes particles including an interior portion and an outer portion, wherein a melting point of the outer portion is less than a melting point of the interior portion.Type: GrantFiled: August 17, 2012Date of Patent: November 26, 2013Assignee: General Electric CompanyInventors: Leonardo Ajdelsztajn, James Anthony Ruud, Timothy Hanlon
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Patent number: 8535755Abstract: A method for making a riser tensioner component is provided. The method comprises the steps of (a) applying a cold spray composition to a metal substrate to achieve a first coating on the metal substrate, wherein the cold spray composition comprises a metal alloy, and wherein the first coating has a thickness in a range from about 5 to about 50 mils; and (b) rough finishing the first coating to achieve a second coating having an average roughness, Ra of less than about 32 micro-inches. A riser tensioner component is also provided, wherein the riser tensioner component comprises a cold spray applied coating on a metal substrate, wherein the coating comprises a metal alloy, and wherein the coating has a thickness in a range from about 5 to about 50 mils; and an average roughness, Ra of less than about 32 micro-inches.Type: GrantFiled: August 31, 2010Date of Patent: September 17, 2013Assignee: General Electric CompanyInventor: Leonardo Ajdelsztajn
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Publication number: 20130153089Abstract: Briefly, in one embodiment, a method is disclosed. The method includes introducing a powder feedstock into a cold-spray apparatus, and operating the cold-spray apparatus to deposit the feedstock. The feedstock includes particles including nickel-base alloy having a thermally altered microstructure.Type: ApplicationFiled: December 16, 2011Publication date: June 20, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Leonardo Ajdelsztajn, Timothy Hanlon
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Publication number: 20130126773Abstract: One aspect of the present invention includes a method. The method includes combusting a fuel and an oxidant in a combustion chamber of a thermal spray gun to form a combustion stream. The method further includes injecting a liquid and a feedstock material into the combustion stream in the combustion chamber to form an entrained feedstock stream, wherein the feedstock material includes a plurality of cermet particles having a median particle size of less than about 5 microns. The method further includes directing the entrained feedstock stream on a surface of a substrate to form a coating, wherein a temperature of the plurality of cermet particles in the entrained feedstock stream is less than a melting temperature of the plurality of cermet particles. Coated articles are also presented.Type: ApplicationFiled: November 17, 2011Publication date: May 23, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Leonardo Ajdelsztajn, James Anthony Ruud, Dennis Michael Gray
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Publication number: 20130047394Abstract: A system and method for refurbishing forged components. The system includes an identification subsystem for identifying a forged component for refurbishment, a removal subsystem for removing portions of the forged component, and a rebuilding subsystem for rebuilding the forged component, the rebuilding subsystem including an assembly for adding a non-molten material to the forged component.Type: ApplicationFiled: August 29, 2011Publication date: February 28, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Laurent Cretegny, William Thomas Carter, Leonardo Ajdelsztajn
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Publication number: 20120318528Abstract: A gate valve has a body, the body having a cavity and a flow passage intersecting the cavity. A seat is mounted to the body at the intersection of the flow passage and the cavity. A gate is installed at the cavity and has an engaging face that slidingly engages the seat while the gate is being moved between open and closed positions. The end faces between a seat pocket and the seat are hard-coated and smooth-finished to provide sealing when mated. The hardcoated pocket and seat sealing surfaces extend the life of the valve by eliminating the need for an elastomeric seal of limited life.Type: ApplicationFiled: June 20, 2011Publication date: December 20, 2012Applicant: VETCO GRAY INC.Inventors: Christopher E. Wolfe, Dennis Gray, Leonardo Ajdelsztajn
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Patent number: 8334031Abstract: An article coated with a highly durable, wetting resistant coating is provided. The article comprises a coating that comprises a cermet material. The cermet material includes a nickel-bearing metal matrix and a phase disposed within the matrix. The phase includes an anion moiety, for example nitrogen, carbon, or boron; and a cation moiety, for example chromium, zirconium, titanium, vanadium, hafnium, niobium, or tantalum. The phase is present in the cermet at a level of at least about 5 volume %.Type: GrantFiled: December 8, 2008Date of Patent: December 18, 2012Assignee: General Electric CompanyInventors: Leonardo Ajdelsztajn, James Anthony Ruud, Dalong Zhong, Molly Maureen Gentleman
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Publication number: 20120051844Abstract: A method for making a riser tensioner component is provided. The method comprises the steps of (a) applying a cold spray composition to a metal substrate to achieve a first coating on the metal substrate, wherein the cold spray composition comprises a metal alloy, and wherein the first coating has a thickness in a range from about 5 to about 50 mils; and (b) rough finishing the first coating to achieve a second coating having an average roughness, Ra of less than about 32 micro-inches. A riser tensioner component is also provided, wherein the riser tensioner component comprises a cold spray applied coating on a metal substrate, wherein the coating comprises a metal alloy, and wherein the coating has a thickness in a range from about 5 to about 50 mils; and an average roughness, Ra of less than about 32 micro-inches.Type: ApplicationFiled: August 31, 2010Publication date: March 1, 2012Applicant: GENERAL ELECTRIC COMPANYInventor: Leonardo Ajdelsztajn
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Publication number: 20110305873Abstract: A coating composition includes a cermet material having metal carbide phase particles with an average size of less than 5 microns. The coating has an average surface roughness of less than approximately 5 microns. A system for applying a coating to a substrate includes a spray gun configured for use with a high velocity oxygen or high velocity air fuel system. The system further includes a cermet material supplied to the spray gun, wherein the cermet material includes at least approximately 34 percent by weight of a metal carbide phase having an average particle size of less than or equal to approximately 5 microns. The metal carbide phase is dispersed in a liquid selected from the group consisting of water, alcohol, an organic combustible liquid, or an organic incombustible liquid.Type: ApplicationFiled: June 9, 2010Publication date: December 15, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Tamara Jean Muth, James Anthony Ruud, Leonardo Ajdelsztajn, Prajina Bhattacharya
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Publication number: 20110293919Abstract: Different types of apparatus for fabricating a deposit, method of deposition and an article are presented. The apparatus include a thermal spray gun comprising a combustion chamber, combustion zone, an air injection port, a fuel injection port, a nozzle and a liquid injection port. The combustion zone exists between the inlet side and outlet side of the combustion chamber. The method includes, among other things, providing a fuel and an oxidizer inside the combustion zone, initiating combustion inside the combustion zone, and directing products of the combustion toward the outlet side to create a combustion product stream. The method also includes introducing a feedstock mixture comprising a feedstock material and a liquid into the combustion product stream to create an entrained feedstock stream, and expelling the entrained feedstock stream from the spray gun through a nozzle to form a deposit on a surface of the article.Type: ApplicationFiled: May 28, 2010Publication date: December 1, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Leonardo Ajdelsztajn, James Anthony Ruud
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Patent number: 8038764Abstract: A method of recovering rhenium from rhenium-containing superalloy scrap is provided. The superalloy is usually a nickel-based superalloy. The method includes the steps of forming an oxidation feedstock of flaky morphology of the superalloy scrap, and oxidizing the oxidation feedstock to convert rhenium into a volatile rhenium oxide. The flaky morphology of the oxidation feedstock is achieved by increasing the surface area of the superalloy scrap.Type: GrantFiled: November 30, 2009Date of Patent: October 18, 2011Assignee: General Electric CompanyInventors: Biju Dasan, Barath Palanisamy, Don Mark Lipkin, Leonardo Ajdelsztajn, Joshua Leigh Miller, Srinidhi Sampath
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Publication number: 20110126673Abstract: A method of recovering rhenium from rhenium-containing superalloy scrap is provided. The superalloy is usually a nickel-based superalloy. The method includes the steps of forming an oxidation feedstock of flaky morphology of the superalloy scrap, and oxidizing the oxidation feedstock to convert rhenium into a volatile rhenium oxide. The flaky morphology of the oxidation feedstock is achieved by increasing the surface area of the superalloy scrap.Type: ApplicationFiled: November 30, 2009Publication date: June 2, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Biju Dasan, Barath Palanisamy, Don Mark Lipkin, Leonardo Ajdelsztajn, Joshua Leigh Miller, Srinidhi Sampath