Patents by Inventor Nathaniel K. Harshman

Nathaniel K. Harshman 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).

  • Publication number: 20210054594
    Abstract: A sealing assembly for a circle member of a motor grader is provided. The sealing assembly includes a plurality of cover segments disposed adjacent to an inner circumference of the circle member. At least one of the plurality of cover segments defines a gap in association with a component disposed adjacent to the at least one of the plurality of cover segments. The sealing assembly also includes a sealing element removably disposed on the at least one of the plurality of cover segments and extending into the gap. The sealing element is adapted to sealingly engage each of the at least one of the plurality of cover segments and the component.
    Type: Application
    Filed: August 20, 2019
    Publication date: February 25, 2021
    Inventors: Benjamin Kovalick, Nathaniel K. Harshman, Lankesh Mathur Shanmukappa, Bruce Raymond Vahling
  • Publication number: 20210002856
    Abstract: A control system for a grading machine includes a circle angle sensor coupled to a circle. The circle is coupled to and supports a grading blade, and the circle angle sensor is configured to measure an angular position of the circle. The control system also includes a blade load sensor configured to measure a load on the grading blade. The control system also includes a circle drive system including a circle drive motor and a controller. The circle drive motor is configured to engage with and rotate the circle around a circle axis, and the controller is configured to control the rotation of the circle under a circle rotation command by monitoring the angular position of the circle and the load on the grading blade.
    Type: Application
    Filed: July 3, 2019
    Publication date: January 7, 2021
    Applicant: Caterpillar Inc.
    Inventor: Nathaniel K. HARSHMAN
  • Publication number: 20200370276
    Abstract: A grading machine includes a machine body, a grading blade supported by a circle, a drawbar connecting the grading blade and the circle to the machine body, and a circle drive system including a circle drive motor and a gear box. The gear box is configured to engage with and rotate the circle relative to the drawbar around a circle axis. The gear box includes a first gear that rotates about a first axis of rotation that is parallel to the circle axis, and the gear box also includes a second gear that rotates about a second axis that is parallel to the circle axis and spaced away from the first axis of rotation.
    Type: Application
    Filed: May 22, 2019
    Publication date: November 26, 2020
    Applicant: Caterpillar Inc.
    Inventors: Nathaniel K. HARSHMAN, Akilan APPAVU, Anand KESHEOREY
  • Publication number: 20200263387
    Abstract: A grading machine includes a machine body, a grading blade supported by a circle, a drawbar connecting the grading blade and the circle to the machine body, and a circle drive system. The circle drive system includes a circle drive motor and a gear box. The gear box is configured to engage with and rotate the circle relative to the drawbar around a circle axis. The circle drive motor includes an axis of rotation that is perpendicular to the circle axis, and the gear box includes an axis of rotation that is parallel to the circle axis.
    Type: Application
    Filed: February 14, 2019
    Publication date: August 20, 2020
    Applicant: Caterpillar Inc.
    Inventors: Nathaniel K. HARSHMAN, David L. COX, Benjamin J. KOVALICK, Bruce R. VAHLING
  • Patent number: 10458081
    Abstract: A work attachment for a motor grader includes a moldboard and a trip edge assembly coupled to the moldboard. The moldboard defines a plurality of first apertures. The trip edge assembly includes a trip edge structure. The trip edge assembly also includes a pivoting mechanism for pivoting a portion of the trip edge assembly in a first direction with respect to the moldboard when the trip edge assembly encounters an object in a drive path of the motor grader. The trip edge assembly further includes a mounting structure defining a plurality of second apertures. The plurality of second apertures are aligned with the plurality of first apertures to receive mechanical fasteners for removably coupling the trip edge assembly with the moldboard.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: October 29, 2019
    Assignee: Caterpillar Inc.
    Inventors: Sean Michael Hayes, Benjamin J. Kovalick, David L. Cox, Nathaniel K. Harshman
  • Publication number: 20190063569
    Abstract: A turnbuckle has a first turnbuckle end and a second turnbuckle end. The turnbuckle includes a first member coupled to the first turnbuckle end. The turnbuckle includes a sleeve having a first end and a second end. The sleeve receives the first member at the first end of the sleeve. The turnbuckle includes a gear mechanism coupled to the sleeve. The turnbuckle further includes an adjustment tool receiver provided on the gear mechanism. The adjustment tool receiver receives a common, non-custom driving tool to adjust a length of the turnbuckle between the first turnbuckle end and the second turnbuckle end.
    Type: Application
    Filed: August 28, 2017
    Publication date: February 28, 2019
    Applicant: Caterpillar Inc.
    Inventors: Nathaniel K. Harshman, David L. Cox
  • Publication number: 20190063021
    Abstract: A work attachment for a motor grader includes a moldboard and a trip edge assembly coupled to the moldboard. The moldboard defines a plurality of first apertures. The trip edge assembly includes a trip edge structure. The trip edge assembly also includes a pivoting mechanism for pivoting a portion of the trip edge assembly in a first direction with respect to the moldboard when the trip edge assembly encounters an object in a drive path of the motor grader. The trip edge assembly further includes a mounting structure defining a plurality of second apertures. The plurality of second apertures are aligned with the plurality of first apertures to receive mechanical fasteners for removably coupling the trip edge assembly with the moldboard.
    Type: Application
    Filed: August 28, 2017
    Publication date: February 28, 2019
    Applicant: Caterpillar Inc.
    Inventors: Sean Michael Hayes, Benjamin J. Kovalick, David L. Cox, Nathaniel K. Harshman
  • Publication number: 20180080194
    Abstract: A drawbar assembly for a motor grader is provided. The drawbar assembly includes a yoke plate, a backbar, a drawbar tube, and a sleeve. The yoke plate includes a first surface and a second surface. The backbar is attached to the first surface of the yoke plate. The backbar includes a tube facing surface. The drawbar tube includes a first end and a second end. The drawbar tube is attached to the first surface of the yoke plate, defining a clearance between the first end of the drawbar tube and the tube facing surface of the backbar. The sleeve encloses at least a portion of the drawbar tube. The sleeve includes a backbar attachment portion and a yoke attachment portion. The backbar attachment portion is attached to the tube facing surface of the backbar and the yoke attachment portion is attached to the first surface of the yoke plate.
    Type: Application
    Filed: September 21, 2016
    Publication date: March 22, 2018
    Applicant: Caterpillar Inc.
    Inventors: Sean M. Hayes, Nathaniel K. Harshman, Lingfei Zhang