Patents by Inventor Michael Duffield

Michael Duffield 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).

  • Patent number: 10960604
    Abstract: In an example, an indicator may comprise an arm pivotally disposed within a media tray, an indicator plate movably coupled to the media tray, and a latch engaged with the arm and the indicator plate. The media tray may receive print media. The latch may support the indicator plate in a raised position, and the latch may release the indicator plate to a lowered position upon the arm pivoting the latch from a latched position to a released position.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: March 30, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Michael Duffield Miles
  • Publication number: 20180257298
    Abstract: In an example, an indicator may comprise an arm pivotally disposed within a media tray, an indicator plate movably coupled to the media tray, and a latch engaged with the arm and the indicator plate. The media tray may receive print media. The latch may support the indicator plate in a raised position, and the latch may release the indicator plate to a lowered position upon the arm pivoting the latch from a latched position to a released position.
    Type: Application
    Filed: December 4, 2015
    Publication date: September 13, 2018
    Inventor: Michael Duffield Miles
  • Patent number: 9406918
    Abstract: A battery assembly including a plurality of battery cells and at least one frame having a support feature formed thereon is disclosed. The support feature supports electrically conductive tabs of the battery cells and militates against damage to the battery assembly during a joining of one of the electrically conductive tabs with another one of the electrically conductive tabs of an adjacent battery cell or during a joining of the electrically conductive tabs of adjacent battery cells with a connector.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: August 2, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Stuart D. Barter, William L. Martz, Benjamin D. Kaufman, Michael Duffield
  • Patent number: 9065158
    Abstract: A cooling module for a battery pack assembly is disclosed. The cooling module includes a frame having a plurality of legs forming an opening through a central portion of the frame, at least one of the plurality of legs including a slot formed therethrough. A cooling fin is coupled to the frame. The cooling fin includes a corrugated plate interposed between a first plate and a second plate forming a plurality of fluid flow channels between the first plate and the second plate. The cooling modules are disposed in a stack having at least one battery cell disposed between adjacent cooling modules. The battery cell is in heat transfer communication with the cooling fin of at least one cooling module, wherein the cooling fin facilitates a transfer of heat energy between the battery cell and the flow channels formed in the cooling fin.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: June 23, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: William L. Martz, Michael Duffield, Megan J. Quick, Stuart D. Barter, Glenn W. Skala, Steven J. Fogarassy, Eric J. Connor, Thaddeus J. Grey
  • Publication number: 20140113169
    Abstract: A battery assembly including a plurality of battery cells and at least one frame having a support feature formed thereon is disclosed. The support feature supports electrically conductive tabs of the battery cells and militates against damage to the battery assembly during a joining of one of the electrically conductive tabs with another one of the electrically conductive tabs of an adjacent battery cell or during a joining of the electrically conductive tabs of adjacent battery cells with a connector.
    Type: Application
    Filed: December 30, 2013
    Publication date: April 24, 2014
    Applicant: GM Global Technology Operations LLC
    Inventors: Stuart D. Barter, William L. Martz, Benjamin D. Kaufman, Michael Duffield
  • Patent number: 8673480
    Abstract: A battery assembly including a plurality of battery cells and at least one frame having a support feature formed thereon is disclosed. The support feature supports electrically conductive tabs of the battery cells and militates against damage to the battery assembly during a joining of one of the electrically conductive tabs with another one of the electrically conductive tabs of an adjacent battery cell or during a joining of the electrically conductive tabs of adjacent battery cells with a connector.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: March 18, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Stuart D. Barter, William L. Martz, Benjamin D. Kaufman, Michael Duffield
  • Patent number: 8574740
    Abstract: A molded cooling fin and frame is described. The molded cooling fin and frame includes a corrugated center cooling fin; a pair of outer cooling fins on opposite sides of the corrugated center cooling fin, each of the outer cooling fins having a ridge around an edge; and a frame covering an edge of each of the outer cooling fins, the frame sealed to the edge of each of the outer cooling fins. A battery pack including the molded cooling fin and frame and a method of making the molded cooling fin and frame are also described.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: November 5, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Megan J. Quick, Derek R. Weber, Thaddeus J. Grey, Michael Duffield
  • Patent number: 8221936
    Abstract: A fuel cell system is provided which includes a mounting system for a manifold having a mounting plate. The fuel cell system also includes a fuel cell stack with a first end and a second end. The first end of the fuel cell stack includes at least one port in communication with the manifold. A clamping system is disposed on the second end of the fuel cell stack and is operable to engage the mounting plate of the manifold to couple the manifold to the fuel cell stack.
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: July 17, 2012
    Inventors: Michael Duffield, Donald H. Keskula
  • Publication number: 20120040222
    Abstract: A molded cooling fin and frame is described. The molded cooling fin and frame includes a corrugated center cooling fin; a pair of outer cooling fins on opposite sides of the corrugated center cooling fin, each of the outer cooling fins having a ridge around an edge; and a frame covering an edge of each of the outer cooling fins, the frame sealed to the edge of each of the outer cooling fins. A battery pack including the molded cooling fin and frame and a method of making the molded cooling fin and frame are also described.
    Type: Application
    Filed: August 10, 2010
    Publication date: February 16, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Megan J. Quick, Derek R. Weber, Thaddeus J. Grey, Michael Duffield
  • Publication number: 20120009462
    Abstract: A battery assembly including a plurality of battery cells and at least one frame having a support feature formed thereon is disclosed. The support feature supports electrically conductive tabs of the battery cells and militates against damage to the battery assembly during a joining of one of the electrically conductive tabs with another one of the electrically conductive tabs of an adjacent battery cell or during a joining of the electrically conductive tabs of adjacent battery cells with a connector.
    Type: Application
    Filed: July 12, 2010
    Publication date: January 12, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Stuart D. Barter, William L. Martz, Benjamin D. Kaufman, Michael Duffield
  • Publication number: 20110293982
    Abstract: A cooling module for a battery pack assembly is disclosed. The cooling module includes a frame having a plurality of legs forming an opening through a central portion of the frame, at least one of the plurality of legs including a slot formed therethrough. A cooling fin is coupled to the frame. The cooling fin includes a corrugated plate interposed between a first plate and a second plate forming a plurality of fluid flow channels between the first plate and the second plate. The cooling modules are disposed in a stack having at least one battery cell disposed between adjacent cooling modules. The battery cell is in heat transfer communication with the cooling fin of at least one cooling module, wherein the cooling fin facilitates a transfer of heat energy between the battery cell and the flow channels formed in the cooling fin.
    Type: Application
    Filed: May 28, 2010
    Publication date: December 1, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: William L. Martz, Michael Duffield, Megan J. Quick, Stuart D. Barter, Glenn W. Skala, Steven J. Fogarassy, Eric J. Connor, Thaddeus J. Grey
  • Publication number: 20060234106
    Abstract: A fuel cell system is provided which includes a mounting system for a manifold having a mounting plate. The fuel cell system also includes a fuel cell stack with a first end and a second end. The first end of the fuel cell stack includes at least one port in communication with the manifold. A clamping system is disposed on the second end of the fuel cell stack and is operable to engage the mounting plate of the manifold to couple the manifold to the fuel cell stack.
    Type: Application
    Filed: April 14, 2005
    Publication date: October 19, 2006
    Inventors: Michael Duffield, Donald Keskula
  • Publication number: 20060056845
    Abstract: An optical signal demodulator for demodulating an M-ary phase shift key (PSK) optical signal comprises a plurality of interferometers arranged such that the optical signal is divided between the interferometes. Each interferometer comprises a plurality of interferometer arms, each arm for transmitting a portion of the signal between an input and an output of the interferometer, the interferometer including an optical delay in one arm relative to another arm thereof. The optical delay between arms of an interferometer may be provided by an optical path length difference between the arms. The optical delay between arms of an interferometer may be different for one interferometer to that of another interferometer.
    Type: Application
    Filed: January 23, 2003
    Publication date: March 16, 2006
    Inventors: Nicholas Parsons, Michael Duffield, Gareth Lees
  • Patent number: 6883481
    Abstract: An infinitely variable cam indexer utilizes engine oil pressure to actuate a cam and preferably uses an inlet check valve in the oil source to minimize back flow during a torque reversal. The control system is in the center of the rotor and uses an electromechanical actuator, preferably a variable force solenoid, acting directly on the spool to control oil flow. This design reduces leakage and improves the response of the phaser. There are shorter oil passages as compared to a control system mounted at the cam bearing.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: April 26, 2005
    Assignee: Borgwarner Inc.
    Inventors: Marty Gardner, Michael Duffield
  • Patent number: 6814037
    Abstract: A variable camshaft timing system having a camshaft with a vane-type rotor, where oscillation of the housing relative to the vane is actuated by pressurized engine oil, derived in part from a torque pulse in the camshaft. An annular locking plate is positioned coaxially with the camshaft and the housing. It is moveable relative to the housing along the longitudinal central axis of the camshaft between two positions, the teeth on the locking plate engaging the teeth on the housing and where the teeth on the locking plate are disengaged from the teeth on the housing, each position preventing circumferential movement of the housing relative to the rotor. The locking plate is biased by a plurality of metallic straps towards engagement of the teeth on locking plate with the teeth on the housing. The straps have one end secured to the locking plate and another end secured to the rotor.
    Type: Grant
    Filed: June 24, 2003
    Date of Patent: November 9, 2004
    Assignee: BorgWarner Inc.
    Inventors: Franklin R. Smith, Roger Simpson, Marty Gardner, Braman Wing, Michael Duffield
  • Patent number: 6763791
    Abstract: An infinitely variable camshaft timing device (phaser) has a control valve located in the rotor. Since the control valve is in the rotor, the camshaft need only provide a single passage for supplying engine oil or hydraulic fluid, and does not need multiple passageways for controlling the phaser, as in the prior art. Two check valves, an advance chamber check valve and a retard chamber check valve, are also located in the rotor. The check valves are located in the control passages for each chamber. The main advantage of putting the check valves in the advance and retard chambers instead of having a single check valve in the supply is to reduce leakage. This design also eliminates high pressure oil flow across the spool valve and improves the response time of the check valve to the torque reversals due to a shorter oil path. In addition, the phaser of the present invention outperforms an oil pressure actuated device and consumes less oil.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: July 20, 2004
    Assignee: BorgWarner Inc.
    Inventors: Marty Gardner, Michael Duffield
  • Publication number: 20040099232
    Abstract: An infinitely variable cam indexer utilizes engine oil pressure to actuate a cam and preferably uses an inlet check valve in the oil source to minimize back flow during a torque reversal. The control system is in the center of the rotor and uses an electromechanical actuator, preferably a variable force solenoid, acting directly on the spool to control oil flow. This design reduces leakage and improves the response of the phaser. There are shorter oil passages as compared to a control system mounted at the cam bearing.
    Type: Application
    Filed: November 14, 2003
    Publication date: May 27, 2004
    Applicant: BorgWarner Inc.
    Inventors: Marty Gardner, Michael Duffield
  • Publication number: 20030033999
    Abstract: An infinitely variable camshaft timing device (phaser) has a control valve located in the rotor. Since the control valve is in the rotor, the camshaft need only provide a single passage for supplying engine oil or hydraulic fluid, and does not need multiple passageways for controlling the phaser, as in the prior art. Two check valves, an advance chamber check valve and a retard chamber check valve, are also located in the rotor. The check valves are located in the control passages for each chamber. The main advantage of putting the check valves in the advance and retard chambers instead of having a single check valve in the supply is to reduce leakage. This design also eliminates high pressure oil flow across the spool valve and improves the response time of the check valve to the torque reversals due to a shorter oil path. In addition, the phaser of the present invention outperforms an oil pressure actuated device and consumes less oil.
    Type: Application
    Filed: July 18, 2002
    Publication date: February 20, 2003
    Inventors: Marty Gardner, Michael Duffield
  • Publication number: 20030033998
    Abstract: An infinitely variable cam indexer utilizes engine oil pressure to actuate a cam and preferably uses an inlet check valve in the oil source to minimize back flow during a torque reversal. The control system is in the center of the rotor and uses an electromechanical actuator, preferably a variable force solenoid, acting directly on the spool to control oil flow. This design reduces leakage and improves the response of the phaser. There are shorter oil passages as compared to a control system mounted at the cam bearing.
    Type: Application
    Filed: July 18, 2002
    Publication date: February 20, 2003
    Inventors: Marty Gardner, Michael Duffield
  • Patent number: 6374787
    Abstract: A hub is secured to a camshaft for rotation synchronous with the camshaft, and a housing circumscribes the hub and is rotatable with the hub and the camshaft and is further oscillatable with respect to the hub and the camshaft within a predetermined angle of rotation. Driving vanes are radially disposed within the housing and cooperate with an external surface on the hub, while driven vanes are radially disposed in the hub and cooperate with an internal surface of the housing. A locking device, reactive to oil pressure, prevents relative motion between the housing and the hub. A controlling device controls the oscillation of the housing relative to the hub.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: April 23, 2002
    Assignee: BorgWarner Inc.
    Inventors: Roger T. Simpson, Michael Duffield, Marty Gardner