Patents by Inventor Mark C. Dierkes

Mark C. Dierkes 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: 11699941
    Abstract: A method of electrically grounding a rotor shaft of an electric motor includes removing a first lockplate fastener from a motor endshield and an internal bearing lockplate. A second lockplate fastener remains coupled to the motor endshield and internal bearing lockplate such that the internal bearing lockplate stays secured along an interior side of the motor endshield. A mounting plate of a shaft ground assembly is positioned along an exterior side of the motor endshield. The mounting plate supports a shaft ground that includes a conductive element configured to electrically couple to the rotor shaft. The first lockplate fastener is replaced with a first mounting plate fastener coupled to the mounting plate, motor endshield, and bearing lockplate to secure the mounting plate to the endshield and to secure the bearing lockplate along the interior side of the motor endshield.
    Type: Grant
    Filed: August 25, 2020
    Date of Patent: July 11, 2023
    Assignee: Nidec Motor Corporation
    Inventors: Steven R. Palmer, Jeffrey Scott Sherman, Chuck Roessler, Mark C. Dierkes
  • Publication number: 20220069677
    Abstract: A method of electrically grounding a rotor shaft of an electric motor includes removing a first lockplate fastener from a motor endshield and an internal bearing lockplate. A second lockplate fastener remains coupled to the motor endshield and internal bearing lockplate such that the internal bearing lockplate stays secured along an interior side of the motor endshield. A mounting plate of a shaft ground assembly is positioned along an exterior side of the motor endshield. The mounting plate supports a shaft ground that includes a conductive element configured to electrically couple to the rotor shaft. The first lockplate fastener is replaced with a first mounting plate fastener coupled to the mounting plate, motor endshield, and bearing lockplate to secure the mounting plate to the endshield and to secure the bearing lockplate along the interior side of the motor endshield.
    Type: Application
    Filed: August 25, 2020
    Publication date: March 3, 2022
    Applicant: Nidec Motor Corporation
    Inventors: Steven R. Palmer, Jeffrey Scott Sherman, Chuck Roessler, Mark C. Dierkes
  • Patent number: 6815926
    Abstract: A single phase, three-speed induction motor having 4, 6, and 8-pole speed configurations. In one embodiment, the motor is constructed and arranged to be used in connection with a washing machine. The 8-pole speed winding shares a portion of the 4-pole speed winding, but not all of the 4-pole speed winding is used in the 8-pole configuration. In one embodiment, the 4-pole speed winding includes four winding portions and the 8-pole speed configuration uses two of the four winding portions without the need for additional switch contacts to reconfigure the motor for operating in the 4-pole mode or the 6-pole mode. In one embodiment, shared winding portions are wound on the stator core in a generally non-sinusoidal distribution and non-shared winding portions are wound on the stator core in a generally sinusoidal distribution.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: November 9, 2004
    Assignee: Emerson Electric Co.
    Inventors: Renyan William Fei, Mark C. Dierkes
  • Publication number: 20030146732
    Abstract: A single phase, three-speed induction motor having 4, 6, and 8-pole speed configurations. In one embodiment, the motor is constructed and arranged to be used in connection with a washing machine. The 8-pole speed winding shares a portion of the 4-pole speed winding, but not all of the 4-pole speed winding is used in the 8-pole configuration. In one embodiment, the 4-pole speed winding includes four winding portions and the 8-pole speed configuration uses two of the four winding portions without the need for additional switch contacts to reconfigure the motor for operating in the 4-pole mode or the 6-pole mode. In one embodiment, shared winding portions are wound on the stator core in a generally non-sinusoidal distribution and non-shared winding portions are wound on the stator core in a generally sinusoidal distribution.
    Type: Application
    Filed: February 6, 2002
    Publication date: August 7, 2003
    Applicant: Emerson Electric Co.
    Inventors: Renyan William Fei, Mark C. Dierkes