Patents by Inventor Grant Spears

Grant Spears 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).

  • Planetary concrete grinder
    Patent number: 11554457
    Abstract: A concrete grinder has a rotating planetary gearbox with counter rotating tooling plates attached. The planetary gearbox is powered directly from a trowel gearbox output shaft, which is connected to a center bore of the planetary gearbox. As the planetary gearbox rotates, tooling shafts are forced to counter rotate because the input shaft of the planetary gearbox is connected to a fixed pulley or sprocket. The planetary gearbox is sealed to keep water, dust or slurry from entering.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: January 17, 2023
    Assignee: HUSQVARNA AB
    Inventor: Grant Spears
  • PLANETARY CONCRETE GRINDER
    Publication number: 20210237220
    Abstract: A concrete grinder has a rotating planetary gearbox with counter rotating tooling plates attached. The planetary gearbox is powered directly from a trowel gearbox output shaft, which is connected to a center bore of the planetary gearbox. As the planetary gearbox rotates, tooling shafts are forced to counter rotate because the input shaft of the planetary gearbox is connected to a fixed pulley or sprocket. The planetary gearbox is sealed to keep water, dust or slurry from entering.
    Type: Application
    Filed: January 31, 2020
    Publication date: August 5, 2021
    Inventor: Grant Spears