Patents by Inventor David Crecelius

David Crecelius 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: 10516323
    Abstract: The present disclosure relates to a transmission system having a transmission subsystem, a transmission housing for housing the transmission subsystem, and a rotor operably associated with the transmission subsystem. The rotor has a weight and dimension to act as a flywheel. At least one stator pole segment is housed within the transmission housing and has at least one stator winding thereon positioned in proximity to a surface of the rotor. An inverter communicates with the stator winding and electrically energizes the winding to cause rotation of the rotor.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: December 24, 2019
    Assignee: AMERICAN AXLE & MANUFACTURING, INC.
    Inventors: David Crecelius, James P. Downs
  • Publication number: 20190157923
    Abstract: An electric motor can include a stator body defining fluid channels extending axially for fluid communication between axial ends of the stator body. Conductive windings can form first loops extending axially outward from the first end of the stator body and second loops extending axially outward from the second end of the stator body. A first cap can be coupled to the first end of the stator body and can include a first wall. The first wall can be between the first loops and the channels. Pins can extend from a side of the first wall that is opposite the first loops. The second cap can be coupled to the second end of the stator body and include a second wall. The second wall can be between the second loops and the channels. Pins can extend from a side of the second wall that is opposite the second loops.
    Type: Application
    Filed: November 22, 2017
    Publication date: May 23, 2019
    Inventors: John Morgante, James P. Downs, David Crecelius, Peter Fischer, Jeffrey J. Ronning
  • Publication number: 20180097430
    Abstract: The present disclosure relates to a transmission system having a transmission subsystem, a transmission housing for housing the transmission subsystem, and a rotor operably associated with the transmission subsystem. The rotor has a weight and dimension to act as a flywheel. At least one stator pole segment is housed within the transmission housing and has at least one stator winding thereon positioned in proximity to a surface of the rotor. An inverter communicates with the stator winding and electrically energizes the winding to cause rotation of the rotor.
    Type: Application
    Filed: October 4, 2016
    Publication date: April 5, 2018
    Inventors: David CRECELIUS, James P. DOWNS
  • Patent number: 9862289
    Abstract: A limited slip electric drive system for a motor vehicle is disclosed. The system uses an induction motor having a stator, and first and second rotors disposed for independent rotation within the stator. The rotors are each independently associated with one wheel of the vehicle and are able to slip when the vehicle goes around a turn. A traction inverter and control system monitors angular speeds of the rotors and determines which of the rotors is turning slower than the other, and controls the induction motor in accordance with the rotor having a lower speed so that a torque signal is generated in accordance with the rotor having the lower speed.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: January 9, 2018
    Assignee: American Axle & Manufacturing, Inc.
    Inventor: David Crecelius
  • Patent number: 9669698
    Abstract: The subject invention is directed to a class of electric hybrid drives that can be retrofit easily to cars and trucks to reduce transportation costs. Certain embodiments include mechanisms for attachment to an existing powertrain, regenerative braking, on-the-road optimization of transportation costs depending on road and route conditions, or an operational mode in which motive power for a vehicle is solely derived from electric energy stored in a battery.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: June 6, 2017
    Assignee: Flagship Enterprise Center, Inc.
    Inventors: David Crecelius, Peter Fischer, Jeff Ronning, Sean Stanley, John E. Waters
  • Patent number: 9651131
    Abstract: A locking differential can include first and second locking dogs and an actuator system. The first dog can include a set of first teeth fixed to a side gear of the differential. The second dog can be axially movable between first and second positions and can include an annular body coupled to a differential case for common rotation and a set of second teeth. In the first position, the first and second teeth can be disengaged. In the second position, the first and second teeth can be engaged, inhibiting relative rotation between the side gear and the differential case. At least one sensor can detect the angular position and angular velocity of the second teeth relative to the first teeth. An actuator can move the second dog from the first position to the second position based on the detected relative angular positions and velocities of the first and second teeth.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: May 16, 2017
    Assignee: American Axle & Manufacturing, Inc.
    Inventors: Satyanarayanan Raghavan, William Wang, David Crecelius
  • Publication number: 20170074380
    Abstract: A locking differential can include first and second locking dogs and an actuator system. The first dog can include a set of first teeth fixed to a side gear of the differential. The second dog can be axially movable between first and second positions and can include an annular body coupled to a differential case for common rotation and a set of second teeth. In the first position, the first and second teeth can be disengaged. In the second position, the first and second teeth can be engaged, inhibiting relative rotation between the side gear and the differential case. At least one sensor can detect the angular position and angular velocity of the second teeth relative to the first teeth. An actuator can move the second dog from the first position to the second position based on the detected relative angular positions and velocities of the first and second teeth.
    Type: Application
    Filed: September 11, 2015
    Publication date: March 16, 2017
    Inventors: Satyanarayanan Raghavan, William Wang, David Crecelius
  • Publication number: 20150075884
    Abstract: The subject invention is directed to a class of electric hybrid drives that can be retrofit easily to cars and trucks to reduce transportation costs. Certain embodiments include mechanisms for attachment to an existing powertrain, regenerative braking, on-the-road optimization of transportation costs depending on road and route conditions, or an operational mode in which motive power for a vehicle is solely derived from electric energy stored in a battery.
    Type: Application
    Filed: November 26, 2014
    Publication date: March 19, 2015
    Inventors: David Crecelius, Peter Fischer, Jeff Ronning, Sean Stanley, John E. Waters
  • Publication number: 20140095002
    Abstract: The subject invention is directed to a class of electric hybrid drives that can be retrofit easily to cars and trucks to reduce transportation costs. Certain embodiments include mechanisms for attachment to an existing powertrain, regenerative braking, on-the-road optimization of transportation costs depending on road and route conditions, or an operational mode in which motive power for a vehicle is solely derived from electric energy stored in a battery.
    Type: Application
    Filed: January 29, 2013
    Publication date: April 3, 2014
    Inventors: David Crecelius, Peter Fischer, Jeff Ronning, Sean Stanley
  • Publication number: 20070145856
    Abstract: A high intensity lighting system comprises a plurality of high intensity discharge lamps electrically connected to a polyphase alternator and a prime mover mechanically connected to the alternator. An inherent impedance characteristic of the alternator permits the lamps to be reliably started and energized without any separate ballast or comparable impedance element. The alternator comprises a stator having teeth extending from a backiron. The teeth consist of the alternator phases, and the coils encircle the respective teeth of each pair and are wound in opposite sense and connected in series. The machine is preferably an axial airgap device wherein the stator assembly has a magnetic core made from low loss, high frequency material. A high pole count permits the electrical device to operate at high commutating frequencies, with high efficiency, high power density and improved performance characteristics.
    Type: Application
    Filed: February 17, 2007
    Publication date: June 28, 2007
    Inventors: Andrew Hirzel, David Crecelius
  • Publication number: 20060131978
    Abstract: A high intensity lighting system comprises a plurality of high intensity discharge lamps electrically connected to a polyphase alternator and a prime mover mechanically connected to the alternator. An inherent impedance characteristic of the alternator permits the lamps to be reliably started and energized without any separate ballast or comparable impedance element. The alternator comprises a stator having teeth extending from a backiron. The teeth consist of the alternator phases, and the coils encircle the respective teeth of each pair and are wound in opposite sense and connected in series. The machine is preferably an axial airgap device wherein the stator assembly has a magnetic core made from low loss, high frequency material. A high pole count permits the electrical device to operate at high commutating frequencies, with high efficiency, high power density and improved performance characteristics.
    Type: Application
    Filed: December 18, 2004
    Publication date: June 22, 2006
    Inventors: Andrew Hirzel, David Crecelius
  • Publication number: 20040100157
    Abstract: Electric machine end turn connectors are used with an electromagnetic device having a ferromagnetic core with a plurality of core slots. Coils are held within the plurality of core slots. The coils are comprised of a plurality of pins positioned within the plurality of core slots. Each of the plurality of pins includes a main body and two tapered ends. When one of the pins is positioned in one of the core slots, the main body of the pin is held within the core slot and the tapered ends of the pin protrude from the stator slot. The plurality of pins form the working lengths of the coils. Two end caps are positioned upon the ferromagnetic core. Each end cap includes a plurality of jumpers. Each jumper includes a bridge portion and two perpendicular connection channels. Each connection channel includes a slit which runs along the connection channel and terminates in a mouth. A heat shrink material surrounds the connection channels.
    Type: Application
    Filed: February 22, 2001
    Publication date: May 27, 2004
    Applicant: Delco Remy America
    Inventors: Laszlo Bori, David Crecelius, Chahee Peter Cho