Patents Assigned to Sikorsky Aircraft Corporation
  • Patent number: 10494687
    Abstract: A method of manufacturing a part is provided. The method includes heating a gear in the presence of carbon to carburize a material of the gear to create a carburized gear, the gear having a plurality of gear teeth and which comprises a selected material. Next, the carburized gear is high pressure gas quenched to drive the carbon into the material of the gear to create a quenched gear. Next, the quenched gear is at least one of cavitation peened and laser peened to create a peened gear. Finally, superfinishing is performed on surfaces of the peened gear.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: December 3, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventor: Bruce D. Hansen
  • Patent number: 10494089
    Abstract: A hanger bearing assembly for a shaft assembly includes a plurality of bearing elements arranged around a circumference of a shaft assembly, each bearing element having a bearing element diameter. A bearing inner race is positioned between the plurality of bearing elements and the shaft assembly and extends circumferentially about the shaft assembly. The bearing inner race includes an outer wall interactive with the plurality of bearing elements. The outer wall has a linear profile extending in an axial direction. A bearing outer race is positioned radially outboard of the plurality of bearing elements and extends circumferentially about the shaft assembly. The bearing outer race includes an inner surface interactive with the plurality of bearing elements and having a curvilinear inner surface profile extending in the axial direction.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: December 3, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Yuriy Gmirya, Rodger W. Bowman
  • Patent number: 10494708
    Abstract: A method of carburizing a steel component having a composition of Fe-16.3Co-7.5Ni-3.5Cr-1.75Mo-0.2W-0.11C-0.03Ti-0.02V includes generating a low pressure vacuum in a carburization furnace having the steel component therein, heating the steel component to an optimal carburization temperature while in the low pressure vacuum, performing a boost cycle to introduce carbon rich gas into the carburization furnace while the steel component is at the optimal carburization temperature and in the low pressure vacuum, and performing a diffuse cycle by ceasing introduction of the carbon rich gas into the carburization furnace to allow for diffusion of the carbon into the steel component to occur and while the steel component is at the optimal carburization temperature and in the low pressure vacuum. The boost cycle and the diffuse cycle are repeated to achieve a carbon content at a surface of the steel component of between 0.40 wt. % and 0.55 wt. %.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: December 3, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Jonathan Buckley, Bruce D. Hansen
  • Patent number: 10488870
    Abstract: One aspect is a flight control system for a coaxial rotary wing aircraft including a main rotor system and an active elevator. The flight control system includes a flight control computer with processing circuitry that executes control logic. The control logic includes a gust detector that produces a gust error indicative of a wind gust encountered by the coaxial rotary wing aircraft. The control logic also includes a gust alleviation control that reduces lift on the main rotor system with collective, based on the gust error, and mixes a collective command to a main rotor cyclic and a differential cyclic to reduce an aircraft pitch response and a lift-offset change. The gust alleviation control also reduces a main rotor pitching moment with the main rotor cyclic, based on the gust error, and mixes a main rotor cyclic command to the active elevator to reduce the aircraft pitch response.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: November 26, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Aaron L. Greenfield, Kenneth S. Wittmer
  • Patent number: 10486805
    Abstract: A control horn arrangement includes a control horn body with an inboard end and an opposed outboard end. The control horn body defines a torque tube axis which extends between the inboard and outboard end of the control horn body. An inner flange and an outer flange are disposed on the outboard end of the control horn body. The inner flange and the outer flange extend about the torque tube axis and define between one another a receptacle to fix a torque tube to the outboard end of the control horn body.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: November 26, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Brian Rothermich, Leon M. Meyer
  • Patent number: 10486806
    Abstract: A tiltwing aircraft includes a fuselage, an engine mounted stationary relative to the fuselage, and an opposed pair of wings. The wings are separated from each other with the fuselage therebetween, each wing independently mounted to the fuselage by a respective pivot system for rotation relative to the fuselage. An opposed pair of rotor assemblies is included, each operatively connected to a respective one of the wings for common rotation with the respective wing back and forth between a first position predominantly for lift to a second position predominantly for thrust.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: November 26, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventor: Mark R. Alber
  • Patent number: 10479511
    Abstract: A direct current (DC) deicing control system including a direct current (DC) power source, and a periodic deicing waveform generator electrically connected to the DC power source. The periodic deicing waveform generator outputs a switched DC voltage having a periodic electrical current waveform including periods of zero voltage and periods of non-zero voltage. The periods of zero voltage define arc extinguishing events reducing arc formation in the DC deicing control system.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: November 19, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Frederick L. Bourne, John Mihalakopoulos
  • Patent number: 10479515
    Abstract: A strut for mounting an engine in an aircraft includes a first member and a second member. A friction material is coupled to a surface of the first member and is positioned between the first member and the second member. At least one attachment couples the first member, the second member, and the friction material. A biasing mechanism is associated with the at least one attachment. A biasing force of the biasing mechanism biases the second member into engagement with the frictional material to create a static frictional load between the first member and the second member.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: November 19, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Scott A. Chasen, William A. Welsh, Chris John Biehl
  • Patent number: 10482776
    Abstract: A landing zone evaluation and rating sharing system includes a central processor unit (CPU), at least one sensor input operatively connected to the CPU, a communication controller operatively connected to the CPU, the communication controller being operable to pass data to other systems associated with the aerial vehicle, and a landing zone (LZ) evaluation controller operatively coupled to a non-volatile computer readable storage medium having computer readable program instructions embodied therewith. The computer readable program instructions are executable by the central processor unit to receive data received through the at least one sensor input, evaluate the data to determine a LZ rating for a particular landing zone, and communicate the LZ rating to one or more systems associated with the aerial vehicle.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: November 19, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: George N. Loussides, Harshad S. Sane
  • Patent number: 10480581
    Abstract: A method of making bearings includes treating a metallic surface of a bearing raceway with a pulsed electrochemical processing nozzle to transform the amorphous oxide into a crystalline structure on the metallic surface electro-chemically and convert the metallic surface into a ceramic like hardness surface. Treating the metallic surface can include forming a gradient in material composition transitioning from a purely metallic material at a cross-sectional position within the bearing raceway to a purely crystalline structure material at the ceramic like hardness surface of the bearing raceway.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: November 19, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Bruce D. Hansen, William P. Fallon, Jr.
  • Patent number: 10480636
    Abstract: A fluid distribution assembly for distributing a fluid includes a first inlet housing; an outlet housing fluidly coupled to the first inlet housing; and a second inlet housing fluidly coupled to the outlet housing; the second inlet housing having a first end and a second end, the second end coupled to the outlet housing at a stagnation dam, the stagnation dam controlling direction of fluid flow through the second inlet housing in response to velocity of fluid flow in the outlet housing.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: November 19, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventor: Eric James Hodgkinson
  • Patent number: 10472086
    Abstract: A method of detecting a landing zone includes scanning an area using a sensor system to obtain data of the area. One or more markings are identified from the data. The one or more markings are verified as corresponding to an intended landing zone.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: November 12, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventor: William McNeill
  • Patent number: 10472079
    Abstract: A method for securing an engine using an adjustable mounting assembly is provided including adjusting an extendible element of the adjustable mounted assembly from a first position to a second position. Another extendible element of the adjustable mounting assembly is adjusted from a third position to a fourth position. The engine is mounted using the adjustable mounted assembly with the extendible element in the second position and another extendible element in the fourth position.
    Type: Grant
    Filed: May 1, 2015
    Date of Patent: November 12, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Jon McBride, Scott A. Chasen
  • Patent number: 10471663
    Abstract: A bonding preparation patch for application to a resin treated surface is provided. The patch includes a strip having first and second portions, each of which has corresponding first and second sides. The strip is formed of resin porous material and is foldable such that the respective first sides of the first and second portions face each other. The patch further includes a resin barrier interposable between corresponding portions of the respective first sides and a tape including at least one adhesive side, which is securable relative to the first portion and disposable in contact with the second side of the second portion.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: November 12, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventor: Allen E. Trudeau
  • Patent number: 10466093
    Abstract: A weight-on-wheel sensing system includes a movable linkage assembly. An indicator is associated with the linkage assembly. At least one biasing mechanism is operably coupled to the indicator such that a biasing force of the biasing mechanism is applied to the indicator. A position sensing mechanism coupled to the indicator to determine a position of the indicator.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: November 5, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventor: Bradley M. Bauer
  • Patent number: 10464666
    Abstract: A swashplate of a blade pitch control assembly is provided including a metal component having one or more interfacing features. The metal component includes a hollow first cylinder having a first flange extending outwardly from a first end thereof and a second flange extending outwardly from a second end thereof. A sidewall extends between the first and second flanges such that a cavity is defined between the first flange, the second flange, and the sidewall. A plurality of connecting members is connected to a portion of the first flange and the second flange and is spaced about a periphery of the first cylinder. A tubular composite component is arranged at least partially within the cavity between adjacent pairs of the connecting members.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: November 5, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Kevin Laitenberger, Stephen V. Poulin, Erik Byrne
  • Patent number: 10457422
    Abstract: A method and apparatus for securing a rotor blade is disclosed. The apparatus includes a base and an offset member configured to maintain the base at a selected distance from a set point. A clamping member is supported by the base and is receptive of the rotor blade at a selected location of the rotor blade, wherein the rotor blade is positioned against the set point. A slidable component supports the clamping member and slides the clamping member within the base to the selected location of the rotor blade. The free end of the clam shell assembly can be secured to a support beam that raises the clam shell assembly and rotor blade from the base for immersion testing.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: October 29, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: David W. Littlejohn, Sven R. Lofstrom, Scott O. Smith
  • Patent number: 10458863
    Abstract: Virtual sensors can be used to monitor the loads on the system in determining damage accumulation, remaining useful life or retirement time of the components. A virtual sensor is a mathematical construct to infer a desired system measurement (e.g. a structural load) from readily available system state parameters (e.g. speed, weight, load factors, control settings, etc.). The accuracy of the virtual sensor depends upon the mapping between the desired measurement and the state parameters. A hybrid load monitoring system and method includes one or more direct or physical sensor measurements in addition to the plurality of virtual sensors. Signals from the physical sensors are included as an input (as opposed to an output) to the mapping between system state parameters and the various target sensor feature amplitudes.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: October 29, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Andreas P. F. Bernhard, James Peter Cycon, Alexander I. Khibnik, Mark W. Davis
  • Patent number: 10457403
    Abstract: A dual primary deicing system for a rotary-wing aircraft, according to an exemplary aspect of the present disclosure includes, among other things, an electrothermal heating element system; and a controller in communication with said electrothermal heating element, said controller communicating a heating cycle to said electrothermal heating element system, said heating cycle defining a first electric pulse train associated with a main rotor blade assembly.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: October 29, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Michael Houlihan, Robert J. Flemming, Jr., Antonio G. Daniele, Timothy R. Budd, Mark P. Eisenhauer
  • Patent number: 10459456
    Abstract: A system and method for flying an aircraft is disclosed. A perception system at the aircraft tracks a trajectory of a moving object. A processor determines, from the trajectory of the moving object, a reference frame in which the moving object is stationary and establishes the aircraft at a selected offset from the moving object for the trajectory of the moving object. The aircraft is flown along a flight path based on the selected offset using calculations performed with respect to the determined reference frame.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: October 29, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Daniel Montrallo Flickinger, Mark D. Ward, William T. McNeill