Patents by Inventor Randal A. Lee

Randal A. Lee 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: 11936253
    Abstract: A system can include an axial field rotary energy device with an axis of rotation and a rotor coaxial with the axis and having a shaft, bearings, rotor disks that are coaxial and permanent magnets on each rotor disk. A printed circuit board (PCB) stator is located between the rotor disks to define an air gap on each side of the PCB stator. An enclosure has two enclosure sections with an inspection port. Bearing caps and bearings are mounted to the rotor. A variable frequency drive (VFD) assembly is coupled to the axial field rotary energy device. The VFD has a flexible conduit that extends between the VFD housing and the axial field rotary energy device. The flexible conduit can adapt to different sizes of axial field rotary energy devices.
    Type: Grant
    Filed: September 27, 2023
    Date of Patent: March 19, 2024
    Assignee: INFINITUM ELECTRIC INC.
    Inventors: Paulo Guedes-Pinto, Shriram Pushparaj Patil, John Mitchell Wilson, Randal A. Lee, Zachary Thomas Radkey-Pechacek, Luke Robert Wilkin
  • Patent number: 11929657
    Abstract: A system has an axial field rotary energy device with a housing, an axis and a rotor with a shaft, bearings, rotor disks and permanent magnets. A printed circuit board (PCB) stator is between the rotor disks to define an air gap on each side thereof. A variable frequency drive (VFD) assembly has a VFD housing and first pads coupled to inductors to facilitate heat removal from the inductors. A concave cradle is coupled to a ferromagnetic core and has a same contour as an outer surface of the ferromagnetic core. A second pad is coupled to a rectifier module. A third pad is coupled to switching devices and has pins to align the switching devices with the third pad. Standoffs are coupled to the VFD housing to support a first printed circuit board assembly (PCBA). A second PCBA is mounted to a shield plate above the first PCBA.
    Type: Grant
    Filed: September 27, 2023
    Date of Patent: March 12, 2024
    Assignee: INFINITUM ELECTRIC INC.
    Inventors: Zachary Thomas Radkey-Pechacek, John Mitchell Wilson, George William Vogel, Jr., Shriram Pushparaj Patil, Randal A. Lee, Paulo Guedes-Pinto
  • Publication number: 20240072591
    Abstract: An axial field rotary energy device can include a housing and a rotor rotatably coupled to the housing. The rotor can have an axis of rotation and magnets. A stator assembly can be coupled to the housing coaxial with and adjacent to the rotor. The stator assembly can include a printed circuit board (PCB) having electrically conductive coils and an internal air duct for cooling the stator assembly.
    Type: Application
    Filed: January 19, 2022
    Publication date: February 29, 2024
    Applicants: INFINITUM ELECTRIC, INC., UNIVERSITY OF MARYLAND, COLLEGE PARK
    Inventors: Raphael Kahat Mandel, Paulo Guedes-Pinto, Amir Shooshtari, Randal A. Lee
  • Publication number: 20230361634
    Abstract: A device has a housing, stators and a rotor with an axis and rotor disks with magnets. Each stator has a printed circuit board with conductive layers laminated together with layers of an insulating material. Each conductive layer has coils that can carry electrical current when connected to an external voltage source. The stators are mechanically coupled to the housing, so the stators react to torque produced by the device. The housing has two end sections and mid-sections where the end sections are mechanically coupled a stator and a ferromagnetic yoke. The mid-sections are mechanically coupled to one or two stators and ferromagnetic yokes. The ferromagnetic yokes are coupled to the stators and to the housing to provide a path for magnetic flux produced by the magnets and a path to conduct heat generated by the stators from the stators to the housing.
    Type: Application
    Filed: May 3, 2022
    Publication date: November 9, 2023
    Applicant: Infinitum Electric, Inc.
    Inventors: Bahareh Anvari, Paulo Guedes-Pinto, Randal A. Lee
  • Publication number: 20230353000
    Abstract: A device has a housing and a rotor with an axis and a rotor disk with a magnet. A cooling plate is coupled to the housing. The cooling plate includes a channel connected to an inlet and an outlet to convey a liquid coolant. A stator is coaxial with the rotor and includes a printed circuit board with conductive layers laminated together with layers of an insulating material. Each conductive layer has coils that can carry electrical current when connected to an external voltage source. The stator is mechanically coupled to the housing, so the stator reacts to torque produced by the device. A ferromagnetic yoke is mechanically and thermally coupled to the stator and to the cooling plate to provide a path for magnetic flux produced by the magnet and a path to conduct heat generated by the stator from the stator to the cooling plate.
    Type: Application
    Filed: May 2, 2022
    Publication date: November 2, 2023
    Applicant: Infinitum Electric, Inc.
    Inventors: Bahareh Anvari, Paulo Guedes-Pinto, Randal A. Lee
  • Publication number: 20230352999
    Abstract: An axial field rotary energy device can include a housing and a rotor coupled to the housing. The rotor can include an axis of rotation and a rotor disk having a magnet. The device can include a stator that is coaxial with the rotor. The stator can include a printed circuit board having conductive layers laminated together with layers of an insulating material. Each conductive layer has coils that can carry electrical current when connected to an external voltage source. The stator is mechanically coupled to the housing, so the stator reacts to torque produced by the device. A ferromagnetic yoke is coaxial with the rotor and stator. The ferromagnetic yoke can be mechanically and thermally coupled to the stator and the housing to provide a path for magnetic flux produced by the magnet and a path to conduct heat generated by the stator from the stator to the housing.
    Type: Application
    Filed: May 2, 2022
    Publication date: November 2, 2023
    Applicant: Infinitum Electric, Inc.
    Inventors: Bahareh Anvari, Paulo Guedes-Pinto, Randal A. Lee
  • Publication number: 20230352995
    Abstract: An axial field rotary energy device can include a housing and a rotor rotatably coupled to the housing. The rotor can have an axis of rotation and magnets. A stator assembly can be coupled to the housing coaxial with and adjacent to the rotor. The stator assembly can include a printed circuit board (PCB) having electrically conductive coils and an internal air duct for cooling the stator assembly.
    Type: Application
    Filed: July 7, 2023
    Publication date: November 2, 2023
    Applicants: INFINITUM ELECTRIC, INC., UNIVERSITY OF MARYLAND, COLLEGE PARK
    Inventors: Raphael Kahat Mandel, Paulo Guedes-Pinto, Amir Shooshtari, Randal A. Lee
  • Patent number: 11710995
    Abstract: An axial field rotary energy device has a PCB stator panel assembly between rotors with an axis of rotation. Each rotor has a magnet. The PCB stator panel assembly includes PCB panels. Each PCB panel can have layers, and each layer can have conductive coils. The PCB stator panel assembly can have a thermally conductive layer that extends from an inner diameter portion to an outer diameter portion thereof. Each PCB panel comprises discrete, PCB radial segments that are mechanically and electrically coupled together to form the respective PCB panels.
    Type: Grant
    Filed: July 21, 2020
    Date of Patent: July 25, 2023
    Assignee: Infinitum Electric, Inc.
    Inventors: Rich Lee, Randal A. Lee, Paulo Guedes-Pinto
  • Publication number: 20230044158
    Abstract: An axial field rotary energy device or system includes an axis, a PCB stator and rotors having respective permanent magnets. The rotors rotate about the axis relative to the PCB stator. A variable frequency drive (VFD) having VFD components are coupled to the axial field rotary energy device. An enclosure contains the axial field rotary energy device and the VFD, such that the axial field rotary device and the VFD are integrated together within the enclosure. In addition, a cooling system is integrated with the enclosure to cool the axial field rotary energy device and the VFD.
    Type: Application
    Filed: October 25, 2022
    Publication date: February 9, 2023
    Applicant: INFINITUM ELECTRIC, INC.
    Inventors: Randal A. Lee, Paulo Guedes-Pinto, Ben Schuler, Rich Lee
  • Publication number: 20230019894
    Abstract: A device has a housing and rotors rotatably coupled to the housing. Each rotor has a magnet on at least one side of the rotor. Printed circuit board (PCB) stators are located axially between the rotors and coupled to the housing. The PCB stators have layers, and each layer has coils. The number of rotors disks is equal to the number of stators plus one. The stators are interleaved with the rotors. A shaft is coupled to the rotors and the housing. The shaft has a hollow section coupled to a source of a liquid coolant through a rotary connector and to radial channels in the shaft that dispense a liquid coolant between the rotors and PCB stators. The shaft has flanges with different diameters configured to receive the rotors disks with respective matching bore diameters. In addition, the housing has a sump to collect the liquid coolant.
    Type: Application
    Filed: September 20, 2022
    Publication date: January 19, 2023
    Applicant: INFINITUM ELECTRIC, INC.
    Inventors: Randal A. Lee, Paulo Guedes-Pinto
  • Patent number: 11509179
    Abstract: An axial field rotary energy device or system includes an axis, a PCB stator and rotors having respective permanent magnets. The rotors rotate about the axis relative to the PCB stator. A variable frequency drive (VFD) having VFD components are coupled to the axial field rotary energy device. An enclosure contains the axial field rotary energy device and the VFD, such that the axial field rotary device and the VFD are integrated together within the enclosure. In addition, a cooling system is integrated with the enclosure to cool the axial field rotary energy device and the VFD.
    Type: Grant
    Filed: January 13, 2021
    Date of Patent: November 22, 2022
    Assignee: Infinitum Electric, Inc.
    Inventors: Randal A. Lee, Paulo Guedes-Pinto, Ben Schuler, Rich Lee
  • Patent number: 11482908
    Abstract: An axial field rotary energy system has a housing and rotors with an axis of rotation that are rotatably coupled to the housing. Each rotor includes a magnet. A stator assembly is located axially between the rotors and coupled to the housing. The stator assembly has a printed circuit board (PCB). The PCB includes a plurality of layers, and each layer has coils. A shaft is coupled to the rotors and the housing. The shaft can dispense a liquid coolant between the rotors and stator assembly. The housing can include a sump to collect the liquid coolant.
    Type: Grant
    Filed: April 12, 2021
    Date of Patent: October 25, 2022
    Assignee: INFINITUM ELECTRIC, INC.
    Inventors: Paulo Guedes-Pinto, Randal A. Lee
  • Patent number: 11476734
    Abstract: A device has a housing and rotors rotatably coupled to the housing. Each rotor has a magnet on at least one side of the rotor. Printed circuit board (PCB) stators are located axially between the rotors and coupled to the housing. The PCB stators have layers, and each layer has coils. The number of rotors disks is equal to the number of stators plus one. The stators are interleaved with the rotors. A shaft is coupled to the rotors and the housing. The shaft has a hollow section coupled to a source of a liquid coolant through a rotary connector and to radial channels in the shaft that dispense a liquid coolant between the rotors and PCB stators. The shaft has flanges with different diameters configured to receive the rotors disks with respective matching bore diameters. In addition, the housing has a sump to collect the liquid coolant.
    Type: Grant
    Filed: April 8, 2022
    Date of Patent: October 18, 2022
    Assignee: Infinitum Electric, Inc.
    Inventors: Randal A. Lee, Paulo Guedes-Pinto
  • Publication number: 20220329132
    Abstract: An axial field rotary energy system has a housing and rotors with an axis of rotation that are rotatably coupled to the housing. Each rotor includes a magnet. A stator assembly is located axially between the rotors and coupled to the housing. The stator assembly has a printed circuit board (PCB). The PCB includes a plurality of layers, and each layer has coils. A shaft is coupled to the rotors and the housing. The shaft can dispense a liquid coolant between the rotors and stator assembly. The housing can include a sump to collect the liquid coolant.
    Type: Application
    Filed: April 12, 2021
    Publication date: October 13, 2022
    Applicant: Infinitum Electric, Inc.
    Inventors: Paulo Guedes-Pinto, Randal A. Lee
  • Publication number: 20220271592
    Abstract: An axial field rotary energy device has a PCB stator panel assembly between rotors with an axis of rotation. Each rotor has a magnet. The PCB stator panel assembly includes PCB panels. Each PCB panel can have layers, and each layer can have conductive coils. The PCB stator panel assembly can have a thermally conductive layer that extends from an inner diameter portion to an outer diameter portion thereof.
    Type: Application
    Filed: May 10, 2022
    Publication date: August 25, 2022
    Applicant: INFINITUM ELECTRIC, INC.
    Inventors: Rich Lee, Randal A. Lee, Paulo Guedes-Pinto
  • Patent number: 11336139
    Abstract: An axial field rotary energy device has a PCB stator panel assembly between rotors with an axis of rotation. Each rotor has a magnet. The PCB stator panel assembly includes PCB panels. Each PCB panel can have layers, and each layer can have conductive coils. The PCB stator panel assembly can have a thermally conductive layer that extends from an inner diameter portion to an outer diameter portion thereof.
    Type: Grant
    Filed: July 21, 2020
    Date of Patent: May 17, 2022
    Assignee: Infinitum Electric, Inc.
    Inventors: Rich Lee, Randal A. Lee, Paulo Guedes-Pinto
  • Patent number: 11065483
    Abstract: An apparatus for containing fires including a fire containment pouch that includes an upper portion and a lower portion, the fire containment pouch is a flame-resistant material. The upper portion includes a pouch section that is coated with an intumescent material and the lower portion including a cuff section. The upper portion and the lower portion juxtaposed one against each other to define an outer containment portion of elongate length from a top of the pouch section and a bottom of the cuff section. The fire containment pouch is adaptable to be pulled inside out thereby transforming the outer containment portion to an inner containment portion and a fastener secured to the bottom of the cuff section to seal an object within the inner containment portion after the fire containment pouch has been pulled inside out.
    Type: Grant
    Filed: February 19, 2018
    Date of Patent: July 20, 2021
    Inventor: Randal A. Lee
  • Publication number: 20210143697
    Abstract: An axial field rotary energy device has a PCB stator panel assembly between rotors with an axis of rotation. Each rotor has a magnet. The PCB stator panel assembly includes PCB panels. Each PCB panel can have layers, and each layer can have conductive coils. The PCB stator panel assembly can have a thermally conductive layer that extends from an inner diameter portion to an outer diameter portion thereof.
    Type: Application
    Filed: July 21, 2020
    Publication date: May 13, 2021
    Applicant: Infinitum Electric, Inc.
    Inventors: Rich Lee, Randal A. Lee, Paulo Guedes-Pinto
  • Publication number: 20210143691
    Abstract: An axial field rotary energy device has a PCB stator panel assembly between rotors with an axis of rotation. Each rotor has a magnet. The PCB stator panel assembly includes PCB panels. Each PCB panel can have layers, and each layer can have conductive coils. The PCB stator panel assembly can have a thermally conductive layer that extends from an inner diameter portion to an outer diameter portion thereof. Each PCB panel comprises discrete, PCB radial segments that are mechanically and electrically coupled together to form the respective PCB panels.
    Type: Application
    Filed: July 21, 2020
    Publication date: May 13, 2021
    Applicant: Infinitum Electric, Inc.
    Inventors: Rich Lee, Randal A. Lee, Paulo Guedes-Pinto
  • Publication number: 20210135549
    Abstract: An axial field rotary energy device or system includes an axis, a PCB stator and rotors having respective permanent magnets. The rotors rotate about the axis relative to the PCB stator. A variable frequency drive (VFD) having VFD components are coupled to the axial field rotary energy device. An enclosure contains the axial field rotary energy device and the VFD, such that the axial field rotary device and the VFD are integrated together within the enclosure. In addition, a cooling system is integrated with the enclosure to cool the axial field rotary energy device and the VFD.
    Type: Application
    Filed: January 13, 2021
    Publication date: May 6, 2021
    Applicant: Infinitum Electric, Inc.
    Inventors: Randal A. Lee, Paulo Guedes-Pinto, Ben Schuler, Rich Lee