Patents by Inventor Richard Ivakitch
Richard Ivakitch 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: 10865807Abstract: A compressor rotor for a gas turbine engine is described which includes sets of blades having different airfoil thickness distributions, each including a frequency modifier forming a thickness differential relative to a baseline blade thickness. The frequency modifiers provide different natural vibration frequencies for each of the blades, and facilitate modifying natural vibration frequency separation between adjacent blades of the compressor rotor.Type: GrantFiled: January 11, 2019Date of Patent: December 15, 2020Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Ignatius Theratil, Krishna Prasad Balike, Sean Michael Kelly, Richard Ivakitch, Peter Townsend, Ronald Dutton, Paul Stone, Robert Venditti, Daniel Fudge, Milica Kojovic, Aldo Abate
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Patent number: 10570741Abstract: A gas turbine engine rotor including a disc adapted to be mounted for rotation about an axis, the disc including an annular balancing flange integrally connected thereto, the balancing flange having a first radial dimension around a first arc angle and a second radial dimension greater than the first radial dimension around a second arc angle, the second arc angle corresponding to 360 minus the first arc angle, the second arc angle being less than 180 degrees, the balancing flange around the second arc angle defining a protuberance, the protuberance being defined through machining of the balancing flange, the protuberance compensating for an unbalance of the rotor.Type: GrantFiled: April 11, 2017Date of Patent: February 25, 2020Assignee: Pratt & Whitney Canada Corp.Inventors: Paul Stone, Richard Ivakitch
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Patent number: 10443446Abstract: A steel soft wall fan case assembly according to one embodiment configured with a thin-walled steel support structure shell including a plurality of annular axial walls of thin sheet metal reinforced by a plurality of rings interconnecting axially adjacent annular axial walls. The steel support structure shell is structurally integrated with honeycomb materials and an annular metallic inner wall. A fabric containment layer may be wrapped around one of the annular axial walls of the steel support structure shell.Type: GrantFiled: February 28, 2018Date of Patent: October 15, 2019Assignee: Pratt & Whitney Canada Corp.Inventors: Richard Ivakitch, Czeslaw Wojtyczka, Andreas Eleftheriou
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Patent number: 10371162Abstract: An integrally bladed fan (IBF) rotor of a gas turbine engine. The IBF rotor includes a hub and a plurality of fan blades extending radially outwardly from the hub and integral therewith. The hub has a fan attachment flange disposed at an end of the hub on a trailing edge side thereof for mounting a booster rotor to a trailing edge side of the fan. The fan attachment flange is disposed at a radial distance from a longitudinal center axis of the integrally bladed fan rotor. The hub has an outer hub surface disposed radially inward from the radial distance of the fan attachment flange.Type: GrantFiled: October 5, 2016Date of Patent: August 6, 2019Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Andreas Eleftheriou, Richard Ivakitch, David Menheere
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Publication number: 20190145431Abstract: A compressor rotor for a gas turbine engine is described which includes sets of blades having different airfoil thickness distributions, each including a frequency modifier forming a thickness differential relative to a baseline blade thickness. The frequency modifiers provide different natural vibration frequencies for each of the blades, and facilitate modifying natural vibration frequency separation between adjacent blades of the compressor rotor.Type: ApplicationFiled: January 11, 2019Publication date: May 16, 2019Inventors: Ignatius THERATIL, Krishna Prasad BALIKE, Sean Michael KELLY, Richard IVAKITCH, Peter TOWNSEND, Ronald DUTTON, Paul STONE, Robert VENDITTI, Daniel FUDGE, Milica KOJOVIC, Aldo ABATE
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Patent number: 10215194Abstract: A compressor rotor for a gas turbine engine is described which includes sets of blades having different airfoil thickness distributions, each including a frequency modifier forming a thickness differential relative to a baseline blade thickness. The frequency modifiers provide different natural vibration frequencies for each of the blades, and facilitate modifying natural vibration frequency separation between adjacent blades of the compressor rotor.Type: GrantFiled: December 21, 2015Date of Patent: February 26, 2019Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Ignatius Theratil, Krishna Prasad Balike, Richard Ivakitch, Sean Michael Kelly, Peter Townsend, Ronald Dutton, Paul Stone, Robert Venditti, Daniel Fudge, Milica Kojovic, Aldo Abate
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Publication number: 20180187570Abstract: A steel soft wall fan case assembly according to one embodiment configured with a thin-walled steel support structure shell including a plurality of annular axial walls of thin sheet metal reinforced by a plurality of rings interconnecting axially adjacent annular axial walls. The steel support structure shell is structurally integrated with honeycomb materials and an annular metallic inner wall. A fabric containment layer may be wrapped around one of the annular axial walls of the steel support structure shell.Type: ApplicationFiled: February 28, 2018Publication date: July 5, 2018Inventors: Richard IVAKITCH, Czeslaw WOJTYCZKA, Andreas ELEFTHERIOU
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Patent number: 9951639Abstract: Vane assemblies for gas turbine engines and methods for assembling vane assemblies are disclosed. The vane assemblies may include at least one shroud having at least one vane-receiving portion, at least one vane having at least one end portion received in the vane-receiving portion, and at least one sealing member having an uncompressed cross-section that is substantially circular. The sealing member(s) are disposed between and in contact with the end portion of the vane and the vane-receiving portion of the shroud.Type: GrantFiled: February 10, 2012Date of Patent: April 24, 2018Assignee: Pratt & Whitney Canada Corp.Inventors: Richard Ivakitch, Andreas Eleftheriou, David Denis, David Menheere
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Patent number: 9945254Abstract: A steel soft wall fan case assembly according to one embodiment configured with a thin-walled steel support structure shell including a plurality of annular axial walls of thin sheet metal reinforced by a plurality of rings interconnecting axially adjacent annular axial walls. The steel support structure shell is structurally integrated with honeycomb materials and an annular metallic inner wall. A fabric containment layer may be wrapped around one of the annular axial walls of the steel support structure shell.Type: GrantFiled: May 14, 2015Date of Patent: April 17, 2018Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Richard Ivakitch, Czeslaw Wojtyczka, Andreas Eleftheriou
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Publication number: 20180094638Abstract: An integrally bladed fan (IBF) rotor of a gas turbine engine. The IBF rotor includes a hub and a plurality of fan blades extending radially outwardly from the hub and integral therewith. The hub has a fan attachment flange disposed at an end of the hub on a trailing edge side thereof for mounting a booster rotor to a trailing edge side of the fan. The fan attachment flange is disposed at a radial distance from a longitudinal center axis of the integrally bladed fan rotor. The hub has an outer hub surface disposed radially inward from the radial distance of the fan attachment flange.Type: ApplicationFiled: October 5, 2016Publication date: April 5, 2018Inventors: Andreas ELEFTHERIOU, Richard IVAKITCH, David MENHEERE
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Publication number: 20170218767Abstract: A gas turbine engine rotor including a disc adapted to be mounted for rotation about an axis, the disc including an annular balancing flange integrally connected thereto, the balancing flange having a first radial dimension around a first arc angle and a second radial dimension greater than the first radial dimension around a second arc angle, the second arc angle corresponding to 360 minus the first arc angle, the second arc angle being less than 180 degrees, the balancing flange around the second arc angle defining a protuberance, the protuberance being defined through machining of the balancing flange, the protuberance compensating for an unbalance of the rotor.Type: ApplicationFiled: April 11, 2017Publication date: August 3, 2017Inventors: Paul STONE, Richard IVAKITCH
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Publication number: 20170175776Abstract: A compressor rotor for a gas turbine engine is described which includes sets of blades having different airfoil thickness distributions, each including a frequency modifier forming a thickness differential relative to a baseline blade thickness. The frequency modifiers provide different natural vibration frequencies for each of the blades, and facilitate modifying natural vibration frequency separation between adjacent blades of the compressor rotor.Type: ApplicationFiled: December 21, 2015Publication date: June 22, 2017Inventors: Ignatius Theratil, Krishna Prasad Balike, Richard Ivakitch, Sean Michael Kelly, Peter Townsend, Ronald Dutton, Paul Stone, Robert Venditti, Daniel Fudge, Milica Kojovic, Aldo Abate
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Patent number: 9651053Abstract: A bleed valve having a piston with a sealing member, the piston being displaceable between a first position to seal an aperture of a fluid conduit and an opposed second position spaced apart from the aperture to allow the working fluid therethrough. The bleed valve also has a guiding assembly with at least one guide wheel mounted to the piston and being displaceable therewith along a guide rail. The guide wheel has a guide groove extending inwardly from an outer rolling surface. The guide rail has a rail surface with a guide protrusion. The guide groove and the guide protrusion are complementary and in rolling contact with one another. The bleed valve also has a displacement mechanism for displacing the piston between the first and second positions. A compressor with a bleed valve and method for controlling bleeding of a working fluid are also discussed.Type: GrantFiled: January 24, 2014Date of Patent: May 16, 2017Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Andreas Eleftheriou, Richard Ivakitch, David Denis
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Patent number: 9638037Abstract: A method of balancing a gas turbine engine rotor, including axisymmetrically removing an annular portion of the balancing flange exceeding that required to provide the unbalance correction, and creating the unbalance correction by non-axisymmetrically removing material from the balancing flange. In one embodiment, the configuration of a theoretical notch in the balancing flange that would create the unbalance correction is determined. The unbalance correction is created by removing material from the balancing flange to create a protuberance protruding radially from a remainder of the balancing flange, the protuberance having a height corresponding to the depth of the theoretical notch, a circumferential width corresponding to the arc angle of the theoretical notch, and a circumferential position diametrically opposed to the circumferential position of the theoretical notch. A gas turbine engine rotor is also discussed.Type: GrantFiled: November 3, 2014Date of Patent: May 2, 2017Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Paul Stone, Richard Ivakitch
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Publication number: 20160333738Abstract: A steel soft wall fan case assembly according to one embodiment configured with a thin-walled steel support structure shell including a plurality of annular axial walls of thin sheet metal reinforced by a plurality of rings interconnecting axially adjacent annular axial walls. The steel support structure shell is structurally integrated with honeycomb materials and an annular metallic inner wall. A fabric containment layer may be wrapped around one of the annular axial walls of the steel support structure shell.Type: ApplicationFiled: May 14, 2015Publication date: November 17, 2016Inventors: Richard IVAKITCH, Czeslaw WOJTYCZKA, Andreas ELEFTHERIOU
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Patent number: 9353626Abstract: A rotor assembly for a gas turbine engine, with an annular sleeve having an inner member connected around the shaft to rotate together therewith and having an outer member with a first end connected to the inner member, the outer member defining an annular continuous frustoconical inner surface angled such as to extend closer to the central axis near the first end. A rotor disc includes an annular protuberance extending radially inwardly of the outer member and forced toward the first end, and having an annular continuous frustoconical outer surface complementary to the inner surface of the outer member and in torque-transmitting engagement therewith. The assembly includes means for axially pressing the sleeve and the disc against one another to maintain the complementary frustoconical surfaces in torque-transmitting engagement. A method of engaging a rotor disc to a driving shaft in a gas turbine engine is also provided.Type: GrantFiled: September 13, 2012Date of Patent: May 31, 2016Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Andreas Eleftheriou, Richard Ivakitch
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Publication number: 20160123150Abstract: A method of balancing a gas turbine engine rotor, including axisymmetrically removing an annular portion of the balancing flange exceeding that required to provide the unbalance correction, and creating the unbalance correction by non-axisymmetrically removing material from the balancing flange. In one embodiment, the configuration of a theoretical notch in the balancing flange that would create the unbalance correction is determined. The unbalance correction is created by removing material from the balancing flange to create a protuberance protruding radially from a remainder of the balancing flange, the protuberance having a height corresponding to the depth of the theoretical notch, a circumferential width corresponding to the arc angle of the theoretical notch, and a circumferential position diametrically opposed to the circumferential position of the theoretical notch. A gas turbine engine rotor is also discussed.Type: ApplicationFiled: November 3, 2014Publication date: May 5, 2016Inventors: Paul STONE, Richard IVAKITCH
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Patent number: 9140125Abstract: An apparatus and method for connecting a fan rotor to a shaft of a gas turbine engine includes a segmented clinch nut plate having a plurality of clinch nuts installed in pre-drilled holes in each segment. A plurality of mounting bolts extending through the holes in the rotor shaft and holes in a mounting device of the shaft threadedly engage the clinch nuts of the clinch nut plate. The segments of the clinch nut plate are disposed separately one from another.Type: GrantFiled: February 2, 2012Date of Patent: September 22, 2015Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Richard Ivakitch, Andreas Eleftheriou
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Patent number: 9109448Abstract: A vane assembly for a gas turbine engine includes an annular shroud having openings therein and a plurality of vanes extending radially from the shroud and each having an extremity received within one of the openings. A grommet is positioned within each opening for shielding the vane extremity from the annular shroud. The grommet includes an annular protrusion for providing sealing between the opening and the vane extremity, and an annular restraint element adjacent the protrusion for retaining the vane in place relative to the shroud.Type: GrantFiled: March 23, 2012Date of Patent: August 18, 2015Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Richard Ivakitch, Andreas Eleftheriou
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Publication number: 20150211540Abstract: A bleed valve having a piston with a sealing member, the piston being displaceable between a first position to seal an aperture of a fluid conduit and an opposed second position spaced apart from the aperture to allow the working fluid therethrough. The bleed valve also has a guiding assembly with at least one guide wheel mounted to the piston and being displaceable therewith along a guide rail. The guide wheel has a guide groove extending inwardly from an outer rolling surface. The guide rail has a rail surface with a guide protrusion. The guide groove and the guide protrusion are complementary and in rolling contact with one another. The bleed valve also has a displacement mechanism for displacing the piston between the first and second positions. A compressor with a bleed valve and method for controlling bleeding of a working fluid are also discussed.Type: ApplicationFiled: January 24, 2014Publication date: July 30, 2015Applicant: Pratt & Whitney Canada Corp.Inventors: Andreas ELEFTHERIOU, Richard IVAKITCH, David DENIS