Patents Assigned to Hamilton Sundstrand Corporation
  • Combination Fuel-Oil and Air-Oil Heat Exchanger
    Publication number: 20120048530
    Abstract: A combination fuel-oil and air-oil heat exchanger comprising: a first heat exchanger section that has an oil circulation path and a fuel circulation path thermally coupled to the oil circulation path; a second heat exchanger section that has an oil circulation path and an air circulation path thermally coupled to the oil circulation path; an oil coupling path that couples an oil circulation path outlet of the first heat exchanger section to an oil circulation path inlet of the second heat exchanger section to establish a combined oil circulation path; an oil path by-pass valve that selectively diverts oil from the combined oil circulation path to an outlet of the oil path by-pass valve; and a fuel path by-pass valve that selectively diverts fuel from the fuel circulation path of the first heat exchanger section to an outlet of the fuel path by-pass valve.
    Type: Application
    Filed: August 31, 2010
    Publication date: March 1, 2012
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Behzad Hagshenas, Stacey H. Light
  • SYSTEM FOR HANDLING OF PERMANENT BIT ERRORS IN MEMORY DEVICES
    Publication number: 20120054570
    Abstract: A memory system including a primary memory storage partition, a secondary memory storage partition, and a memory controller that is connected to read and write to the primary memory storage partition and detect a permanent bit error at an address associated with the primary memory storage partition. In response to a detected permanent bit error, the memory controller stores data from the address associated with the permanent bit error to an address associated with the secondary memory storage partition.
    Type: Application
    Filed: August 30, 2010
    Publication date: March 1, 2012
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventor: Kirk A. Lillestolen
  • PRINTED CIRCUIT BOARD HOUSING WITH TAPERED LOCKING RAILS
    Publication number: 20120051014
    Abstract: An assembly includes a housing, a first locking rail, and a second locking rail. The housing has first and second sidewalls. First and second guiderails extend from the first sidewall toward the second sidewall. Third and fourth guiderails extend from the second sidewall toward the first sidewall. The first locking rail is positioned between the first guiderail and the second guiderail. The first locking rail has a first surface nearest the first guiderail and a second surface nearest the second guiderail. The first surface is inclined with respect to the second surface. The second locking rail is positioned between the third guiderail and the fourth guiderail. The second locking rail has a third surface nearest the third guiderail and a fourth surface nearest the fourth guiderail. The third surface is inclined with respect to the fourth surface.
    Type: Application
    Filed: August 27, 2010
    Publication date: March 1, 2012
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Jason C. Duffy, Charles V. DeSantis
  • Aircraft landing gear unlock actuator
    Patent number: 8123161
    Abstract: This disclosure relates to a landing gear system that includes a landing gear strut rotatable between stowed and deployed positions. A lock-stay is connected to the landing gear strut and is movable between locked and unlocked conditions. An unlock actuator is connected to the lock-stay and includes first and second members movable relative to one another. The first member is movable between first and second positions that correspond to the locked and unlocked conditions. A controller is in communication with the unlock actuator and is configured to command the unlock actuator between the first and second positions in response to an input. The second member is permitted to free-drive relative to the first member between the stowed and deployed positions with the lock-stay in the unlocked condition.
    Type: Grant
    Filed: June 3, 2008
    Date of Patent: February 28, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Andrew John Collins
  • CONTROL OF POLE-CHANGE INDUCTION MOTORS
    Publication number: 20120043921
    Abstract: A ram air fan control system includes a ram air fan motor, the ram air fan motor being a pole-change induction motor with at least two pole-count configurations, a ram air fan contactor in operative communication with a first pole-count configuration of the ram air fan motor over a ram air fan conductor bus, a ram air fan power controller in operative communication with the ram air fan contactor, a common contactor in operative communication a second pole-count configuration of the ram air fan motor over a common conductor bus, the common conductor bus being separate and electrically isolated from the ram air fan conductor bus, and a common power controller in operative communication with the common contactor.
    Type: Application
    Filed: August 18, 2010
    Publication date: February 23, 2012
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Waleed Said, Huazhen Chai
  • ENGINE TURBINE TEMPERATURE MEASUREMENT
    Publication number: 20120044969
    Abstract: An assembly for sensing temperature in a gas turbine engine includes a first array of RTDs connected in parallel, a second array of RTDs connected in parallel, and a circuit electrically connected to the first and second arrays. The circuit determines an approximate temperature of a medium as a function of resistance of the first and second arrays.
    Type: Application
    Filed: August 19, 2010
    Publication date: February 23, 2012
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventor: Thaddeus J. Zebrowski
  • THERMAL EXPANSION COMPENSATOR HAVING AN ELASTIC CONDUCTIVE ELEMENT BONDED TO TWO FACING SURFACES
    Publication number: 20120045948
    Abstract: A thermal expansion compensator is provided and includes a first electrode structure having a first surface, a second electrode structure having a second surface facing the first surface and an elastic element bonded to the first and second surfaces and including a conductive element by which the first and second electrode structures electrically and/or thermally communicate, the conductive element having a length that is not substantially longer than a distance between the first and second surfaces.
    Type: Application
    Filed: August 17, 2010
    Publication date: February 23, 2012
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: William Determan, Daniel Edward Matejczyk
  • Slip ring assembly
    Patent number: 8120228
    Abstract: A split slip ring assembly formed from first and second halves of a slip ring having a contact surface for rotational engagement with a stationary brush element for transferring electrical signals there between. The contact surface has a smooth surface at the junction of the first and second halves. A fastener locates the first and second halves to form a ring shape. An electrical contact on the ring carries electrical signals between the slip ring and the brush element. An alignment element aligns the first and second halves to form the smooth surface at their junction.
    Type: Grant
    Filed: April 15, 2009
    Date of Patent: February 21, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Paul A. Carvalho
  • Thermal management system with staged cooling
    Patent number: 8118257
    Abstract: A thermal management system comprises a first heat exchanger having an inlet and an outlet, a second heat exchanger having an inlet and an outlet, a fluid loop, a first heat pump, and a second heat pump. The fluid loop circulates a fluid, and forms a continuous path between the first and second heat exchangers. The first heat pump is connected to the fluid loop and is disposed between the outlet of the second heat exchanger and the inlet of the first heat exchanger. The second heat pump is connected to the fluid loop and is disposed between the outlet of the first heat exchanger and the inlet of the second heat exchanger.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: February 21, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventors: George Eugene Wilmot, Jr., Diane G. Drew, Gregory M. Ott
  • Method of detecting a sustained parallel source condition
    Patent number: 8120206
    Abstract: A method of detecting a parallel source condition includes calculating a reactive power, comparing the reactive power to a predetermined threshold, and determining a parallel source condition in response to the reactive power exceeding the predetermined threshold.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: February 21, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Jeffrey D. Myroth, Vijay K. Maddali
  • Sacrificial blade tip
    Patent number: 8118562
    Abstract: A propeller blade device used in environments where a propeller system is subjected to blade erosion and wear and may also be subjected to an axial force from water. The propeller blade includes a blade tip mounted on its outer end using a mounting device such as nuts and bolts to form a junction there between. The tip may easily be replaced when worn or damaged without removing the blade. The tip is designed to fracture upon impact with an axial force before transmitting the force radially inward to the propeller blade.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: February 21, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Mark Raes, David V. Arel
  • ELECTRONIC ENCLOSURE INCLUDING A FLAME ARRESTOR HAVING A MECHANICAL CHECK VALVE
    Publication number: 20120037624
    Abstract: An electronic enclosure includes a housing having a plurality of walls that define an interior portion. A flame arrestor is mounted to one of the plurality of walls of the housing. The flame arrestor includes a mechanical check valve. The mechanical check valve is configured and disposed to allow a fluid to exit the interior portion of the housing and prevent fluid from entering the interior portion of the housing.
    Type: Application
    Filed: August 10, 2010
    Publication date: February 16, 2012
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Wagdy Wahba, Frank Crooks
  • AUXILIARY POWER UNIT WITH MULTIPLE FUEL SOURCES
    Publication number: 20120036866
    Abstract: A system and method are disclosed for supplying fuel to an auxiliary power unit of an aircraft. The system includes a primary fuel source, a secondary fuel source, and a secondary valve. The primary fuel source is in fluid communication with the auxiliary power unit to provide a primary fuel thereto. Similarly, the secondary fuel source is in fluid communication with the auxiliary power unit to provide a secondary fuel thereto. The secondary valve regulates flow of the secondary fuel from the secondary fuel source to the auxiliary power unit. The method provides a secondary fuel from a secondary fuel source to the auxiliary power unit if an emergency operating condition experienced by the aircraft results from either exhaustion or contamination of a primary fuel.
    Type: Application
    Filed: August 11, 2010
    Publication date: February 16, 2012
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventor: Adam M. Finney
  • Auxiliary power unit inlet duct with acoustic silencing
    Patent number: 8113767
    Abstract: An inlet duct for an auxiliary power unit comprises an inlet end, and extends to an outlet end. At least one splitter is positioned within the duct and between the inlet and the outlet end to sub-divide an interior of the duct into plural flow paths.
    Type: Grant
    Filed: September 15, 2008
    Date of Patent: February 14, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Jeffrey Carl Brill, James C. Napier
  • On-line measurement of an induction machine's rotor time constant by small signal d-axis current injection
    Patent number: 8115441
    Abstract: A controller continually updates rotor time constant estimation of an induction machine by interrogating the induction machine with a small signal oscillation and monitoring the response. The small signal oscillation is injected onto the d-axis current command signal, and is generated at a frequency that represents the most recent estimate of the rotor time constant (i.e., rotor time constant equal the inverse of the frequency). The controller monitors rotor flux generated in response to the small signal oscillation, and updates the most recent estimate of the rotor time constant based on the monitored rotor flux. This process is repeated continuously to allow for the continuous updating of the rotor time constant.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: February 14, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Charles J. Romenesko, Vijay K. Maddali
  • Coolable airfoil attachment section
    Patent number: 8113784
    Abstract: A rotor blade suitable for use in a gas turbine engine includes an attachment section which defines at least one internal cooling passage along a passage axis through the attachment section.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: February 14, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Shiv C. Gupta
  • Vane pump with rotating cam ring and increased under vane pressure
    Patent number: 8113804
    Abstract: An example vane pump comprises a shaft driving a rotor. The rotor has a plurality of vane grooves, with a vane received in each of the plurality of vane grooves, and an under vane chamber for communicating a pressurized fluid into the grooves to bias the vanes radially outwardly of the rotor. A cam ring is positioned radially outwardly of the rotor. The cam ring is free to rotate with the rotor through friction from the vanes as the rotor rotates. An inlet delivers a fluid to be pumped into an inlet chamber, and an outlet receives the fluid pumped by the vane pump. An outlet for the fluid biasing the vanes communicates to a main outlet through a passage including a valve to increase the pressure of the fluid in the grooves.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: February 14, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Steven A. Heitz, Christian L. Griffiths
  • Hardware system for high pressure electrochemical cell
    Patent number: 8114555
    Abstract: A method of manufacture includes an electrochemical cell structure having a first conductive member and a second conductive member. The first conductive member is spaced from the second conductive member. An adhesive is disposed between the first conductive member and the second conductive member. The adhesive has a solid state and a liquid state. The adhesive is liquefied to form a seal between the first conductive member and the second conductive member.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: February 14, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Andrei Leonida, Robert J. Roy, Kurt Matthew Critz
  • Low mass driveshaft speed sensor assembly
    Patent number: 8111062
    Abstract: A speed sensor assembly comprises: a driveshaft with a driveshaft axis, a sensing portion of the driveshaft having an axial bore along the driveshaft axis and multiple axial slots radially spaced around the sensing portion that penetrate through the driveshaft into the axial bore; and at least one electromagnetic sensor with a magnetic circuit proximate the sensing portion of the driveshaft; wherein rotation of the driveshaft causes the slots in the sensing portion to sequentially pass through the magnetic circuit of the electromagnetic sensor, thereby causing a change in the reluctance of its magnetic circuit that induces the electromagnetic sensor to generate an output signal that is representative of the rotational speed of the driveshaft.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: February 7, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Timothy M. Hollman, Olivier J. Lamicq, Kevin K. Taft
  • Auxiliary power unit with dual use of speed signals
    Patent number: 8112184
    Abstract: An auxiliary power unit has a speed sensor for sensing a speed of operation of the auxiliary power unit. The speed sensor sends a signal to an electronic control box. The electronic control box is operable to control the auxiliary power unit. A branch line is for communicating the speed signal to a health monitoring system. The branch passes through an electronic component that will isolate the speed signal as it passes beyond the component and to the downstream use, such that corruption at a downstream use will not pass back upstream to corrupt the signals used in the electronic control box.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: February 7, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Walter Ernest Ainslie