Patents by Inventor Edward F. Pietraszkiewicz

Edward F. Pietraszkiewicz 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).

  • Publication number: 20140072436
    Abstract: A blade for a gas turbine engine includes a shank interconnecting a root and a platform, and an airfoil extending radially from the shank. The shank includes a pocket with the platform overhanging the pocket. A rail extends axially along a lateral edge of the platform and extends radially inward from the platform in a direction opposite the airfoil. A gusset extends from an underside of the platform facing the pocket and in a circumferential direction between the rail and the shank.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Inventors: Seth J. Thomen, Edward F. Pietraszkiewicz
  • Publication number: 20130251536
    Abstract: A hybrid airfoil for a gas turbine engine according to an exemplary embodiment of this disclosure can include a leading edge portion, a trailing edge portion, and an intermediate portion between the leading edge portion and the trailing edge portion. The leading edge portion can be made of a first material, the trailing edge portion can be made of a second material, and the intermediate portion can be made of a third material. At least two of the first material, the second material and the third material are different materials.
    Type: Application
    Filed: March 26, 2012
    Publication date: September 26, 2013
    Inventors: Sergey Mironets, Edward F. Pietraszkiewicz, Alexander Staroselsky, Mark F. Zelesky
  • Publication number: 20130243591
    Abstract: An airfoil for a gas turbine engine according to one exemplary embodiment includes an airfoil body that extends between a leading edge and a trailing edge. A cooling circuit can be defined within the airfoil body. The cooling circuit can include at least one trip strip disposed within a cavity of the cooling circuit between a leading edge inner wall and a first rib. The at least one trip strip can include an increasing height in a direction from the first rib toward the leading edge inner wall.
    Type: Application
    Filed: March 16, 2012
    Publication date: September 19, 2013
    Inventors: Tracy A. Propheter-Hinckley, Edward F. Pietraszkiewicz, Rafael A. Perez, Anton G. Banks
  • Publication number: 20130209232
    Abstract: A gas turbine engine component includes a wall with an inner face and an outer skin. A plurality of cooling air holes extend from the inner face to the outer skin. The cooling holes include an inlet merging into a metering section, and a diffusion section downstream of the metering section, and extend to an outlet at the outer skin. The diffusion section includes a plurality of lobes. A coating layer is formed on the outer skin, with at least a portion of the plurality of lobes formed within the thermal barrier coating. A method of forming such a component is also disclosed.
    Type: Application
    Filed: July 9, 2012
    Publication date: August 15, 2013
    Inventors: JinQuan Xu, Edward F. Pietraszkiewicz, Mark F. Zelesky, Glenn Levasseur, Dominic J. Mongillo
  • Publication number: 20130206733
    Abstract: A method for forming a cooling hole extending from an inlet on a first surface of a wall to an outlet on a second surface of the wall includes forming a diffusing section of the cooling hole, and a trailing edge on the outlet by electrical discharge machining, and forming longitudinal lobes in the diffusing section. The metering section extends from the inlet on a first surface of the wall towards the second surface of the wall. The diffusing section extends from the outlet to one end of a metering section located between the inlet and the outlet. The outlet is substantially linear or convex at the trailing edge and the lobes are separated by longitudinal ridges.
    Type: Application
    Filed: July 9, 2012
    Publication date: August 15, 2013
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Glenn Levasseur, Edward F. Pietraszkiewicz, Mark F. Zelesky, Dominic J. Mongillo, JR., Kevin J. Klinefelter, Stephen D. Doll, Markus W. Fritch
  • Publication number: 20130205802
    Abstract: A gas turbine engine component includes a wall having first and second wall surfaces and a cooling hole extending through the wall. The cooling hole includes an inlet located at the first wall surface, an outlet located at the second wall surface and a diffusing section in communication with the inlet and extending to the outlet. The diffusing section includes a plurality of crenellation features that encourage lateral spreading of cooling air flowing through the cooling hole.
    Type: Application
    Filed: July 9, 2012
    Publication date: August 15, 2013
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Glenn Levasseur, Edward F. Pietraszkiewicz
  • Publication number: 20130170963
    Abstract: A Blade Outer Air Seal (BOAS) includes a body manufactured of a metal alloy, the body includes a face opposite a forward interface and an aft interface, the face includes a cavity. A non-metallic insert within the cavity such that the insert is flush with the face.
    Type: Application
    Filed: January 4, 2012
    Publication date: July 4, 2013
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Sergey Mironets, Edward F. Pietraszkiewicz, Alexander Staroselsky, Mark F. Zelesky
  • Publication number: 20130156601
    Abstract: An airfoil for a gas turbine engine includes an airfoil body and a cooling circuit defined within the airfoil body. The cooling circuit includes at least a first cavity in fluid communication with a second cavity. A first portion of the first cavity extends between an outer diameter and an inner diameter of the airfoil body and a second portion of the first cavity extends across a space between a leading edge and a trailing edge of the airfoil body.
    Type: Application
    Filed: December 15, 2011
    Publication date: June 20, 2013
    Inventors: Tracy A. Propheter-Hinckley, Rafael A. Perez, Edward F. Pietraszkiewicz
  • Patent number: 8439629
    Abstract: A turbine engine blade outer air seal segment has a body having a base portion. The base portion has a transversely concave ID face, a forward end, an aft end, and first and second circumferential edges. The body has at least one mounting hook. At least one cover plate is secured to the body to define at least one cavity. The cover plate has a plurality of feed holes. A plurality of outlet holes extend through the base portion to the ID face. At least one of the base portion and cover plate comprises a protruding portion protruding into the cavity to form a partial restriction separating forward and aft cavity portions.
    Type: Grant
    Filed: March 1, 2007
    Date of Patent: May 14, 2013
    Assignee: United Technologies Corporation
    Inventors: Edward F. Pietraszkiewicz, John C. Calderbank, Joseph A. Peto, Lisa P. O'Neill, Michael J. Bruskotter
  • Publication number: 20130039773
    Abstract: A method of designing a turbine blade includes the steps of forming at least two notches on a tip of a turbine blade, each of the at least two notches having a known dimension. The turbine blade has a pressure side and a suction side. The method further includes the step of operating a gas turbine engine including the turbine blade to expand a length of the turbine blade such that the tip of the turbine engages a casing. The method further includes the steps of viewing the tip of the turbine blade after the step of operating of the gas turbine engine, determining an appearance of the notches on the tip and determining a manufacturing length of the turbine blade based on the step of determining the appearance the notches.
    Type: Application
    Filed: August 12, 2011
    Publication date: February 14, 2013
    Inventors: Stanley J. Funk, Edward F. Pietraszkiewicz
  • Publication number: 20130001203
    Abstract: An apparatus and method for machining apertures into a conductive workpiece is disclosed. The apparatus has a tank capable of holding a dielectric fluid, and a fixture for holding the workpiece in the tank. An electric discharge machine with an electrode, a power supply connected to the electrode that produces machining pulses for electric discharge machining through the workpiece, and a controller for regulating the power supply and electrode position is also part of the apparatus. Finally, the apparatus has a pressure transducer connected to the fixture, and a process controller in communication with the electric discharge machine controller and pressure transducer.
    Type: Application
    Filed: June 29, 2011
    Publication date: January 3, 2013
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Sergey Mironets, James M. Koonankeil, Edward F. Pietraszkiewicz, Thomas R. Davis
  • Patent number: 8177507
    Abstract: A cooled airfoil includes a concave pressure wall extending radially from a base to a tip of the airfoil, a convex suction wall connected to the concave pressure wall at a leading edge and a trailing edge spaced axially from the leading edge, and cooling channels extending radially between the base and the tip of the airfoil between the concave pressure wall and the convex suction wall and configured to receive a cooling fluid supply through the base of the airfoil. The cooling channels include a leading edge channel, a trailing edge channel, a serpentine cooling circuit, and a dedicated up-pass channel. The serpentine cooling circuit includes a first up-pass channel forward of the trailing edge channel and configured to be in flow communication with a supply channel through the base of the airfoil, a down-pass channel forward of and in flow communication with the first up-pass channel, and a second up-pass channel forward of and in flow communication with the down-pass channel.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: May 15, 2012
    Assignee: United Technologies Corporation
    Inventors: Edward F. Pietraszkiewicz, Sandra S. Pinero
  • Patent number: 8172533
    Abstract: A cooled airfoil includes a concave pressure wall extending radially from a base to a tip of the airfoil, a convex suction wall connected to the concave pressure wall at a leading edge and a trailing edge spaced axially from the leading edge, and a plurality of cooling channels formed between the concave pressure wall and the convex suction wall and configured to receive a cooling fluid supply from the base of the airfoil. The cooling channels include a leading edge channel extending radially from the base toward the tip, a trailing edge channel extending radially from the base toward the tip and in flow communication with a plurality of trailing edge apertures adapted to exhaust cooling fluid to the exterior of the airfoil, a serpentine cooling circuit including a plurality of channels, and a dedicated up-pass channel extending radially from the base toward the tip between the leading edge channel and the forward most channel of the plurality of channels in the serpentine cooling circuit.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: May 8, 2012
    Assignee: United Technologies Corporation
    Inventors: Sandra S. Pinero, Edward F. Pietraszkiewicz, Bryan P. Dube, Stephen J. Yee, Ryan Shepard Levy, Mohamed Hassan, Domenico Valerio, Scott D. Hartmann
  • Patent number: 8123466
    Abstract: A turbine engine blade outer air seal segment has a body having a base portion. The base portion has a transversely concave ID face, a forward end, an aft end, and first and second circumferential edges. The body has at least one mounting hook. At least one cover plate is secured to the body to define at least one cavity. The cover plate has a plurality of feed holes. A plurality of outlet holes extend through the base portion to the ID face. At least one of the base portion and cover plate comprises a protruding portion protruding into the cavity to form a partial restriction separating circumferentially and fore-aft offset cavity portions.
    Type: Grant
    Filed: March 1, 2007
    Date of Patent: February 28, 2012
    Assignee: United Technologies Corporation
    Inventors: Edward F. Pietraszkiewicz, John C. Calderbank, Joseph A. Peto, Lisa P. O'Neill, Michael J. Bruskotter
  • Publication number: 20110186550
    Abstract: A tool for forming a trench and a plurality of cooling holes within the trench includes a body, the body including a ridge portion extending along a first side of the tool. The ridge portion is operable to mate with a workpiece to form a trench on the workpiece. A plurality of electrodes extend from the ridge portion and are oriented to form a plurality of cooling holes within the trench on the workpiece.
    Type: Application
    Filed: February 1, 2010
    Publication date: August 4, 2011
    Inventors: Jesse Gannelli, Scott W. Gayman, Edward F. Pietraszkiewicz, Christopher B. Jelks, Sandra S. Pinero, Paul Thomas Rembish, Ryan Shepard Levy
  • Patent number: 7980820
    Abstract: A blade is provided for a turbine engine that includes an exterior surface. The exterior surface includes a portion having a thermal barrier coating and an uncoated shelf adjacent to the thermal barrier coating without the thermal barrier coating. A cooling hole extends from an internal passageway through the exterior surface to an exit. A scarfed channel is recessed in the exterior surface and interconnected to the cooling hole at the exit. The scarfed channel extends to a blade tip end surface. The scarfed channel protects the cooling fluid exiting the cooling hole from secondary flows surrounding the blade that would otherwise mix with and disperse the cooling fluid. The scarfed channels also increase the surface area exposed to the cooling fluid to increase the heat transfer rate.
    Type: Grant
    Filed: August 27, 2007
    Date of Patent: July 19, 2011
    Assignee: United Technologies Corporation
    Inventors: Scott W. Gayman, Justin D. Piggush, Edward F. Pietraszkiewicz, William A. Agli, III
  • Publication number: 20110132876
    Abstract: The diffusion opening in the cooling hole of an airfoil is formed by an EDM process in which the outwardly flaring sidewalls of the opening, rather then having surfaces that are approximated to be smooth by having many small ribs formed therein, are formed with a relatively few ribs with both longitudinally extending and radially extending surfaces that are substantially greater in dimension than those as normally formed. In this manner, the machining process is simplified and expedited, while at the same time, the cooling efficiency is increased.
    Type: Application
    Filed: January 12, 2011
    Publication date: June 9, 2011
    Applicant: United Technologies Corporation
    Inventors: Edward F. Pietraszkiewicz, Kevin J. Klinefelter, Atul Kohli, Todd R. Coons
  • Publication number: 20110135446
    Abstract: If a refractory metal core (RMC) is punched, the punching asymmetry may be reflected in an asymmetry of the cast article features cast by the punched features. The punched features may have a shear zone and a fracture zone. The shear zone of the RMC will cast a relatively narrow portion of the post near one end; whereas the fracture zone will cast a relatively broader portion near the other end. The broader portion will also have a relatively shallow transition to the adjacent face of the slot-like passageway cast by the RMC. Where there is a stress asymmetry in the cast article in-use, the punching direction may be chosen so that the relatively broad portions of the post fall along the relatively higher stress face of the passageway.
    Type: Application
    Filed: December 4, 2009
    Publication date: June 9, 2011
    Applicant: United Technologies Corporation
    Inventors: Bryan P. Dube, Edward F. Pietraszkiewicz, David J. Candelori
  • Patent number: 7883320
    Abstract: The diffusion opening in the cooling hole of an airfoil is formed by an EDM process in which the outwardly flaring sidewalls of the opening, rather then having surfaces that are approximated to be smooth by having many small ribs formed therein, are formed with relatively few ribs with both longitudinally extending and radially extending surfaces that are substantially greater in dimension than those as normally formed. In this manner, the machining process is simplified and expedited, while at the same time, the cooling efficiency is increased.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: February 8, 2011
    Assignee: United Technologies Corporation
    Inventors: Edward F. Pietraszkiewicz, Kevin J. Klinefelter, Atul Kohli, Todd R. Coons
  • Patent number: 7874158
    Abstract: A compressor diffuser for a gas turbine engine is provided with a dirt separator. The dirt separator ensures the air having moved downstream of the compressor section, and moving toward the combustion section, is separated into a dirtier air flow path directly radially outwardly, and a cleaner airflow path directed radially inwardly. In this manner, the air reaching a combustion section, and the air being utilized for radially inner cooling air is relatively cleaner air. Further, the dirt separator provides a convenient surface for mounting a pressure sensor. In one embodiment, the dirt separator is mounted within the diffuser housing, and in a second embodiment, it is mounted immediately downstream.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: January 25, 2011
    Assignee: United Technologies Corporation
    Inventors: Lisa O'Neill, Edward F. Pietraszkiewicz, Richard Silverman, Barry Beckwith