Patents by Inventor Derek J. DUNBAR

Derek J. DUNBAR 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: 20250235734
    Abstract: The present invention relates to an adjustable center-mass weight assembly including a plurality of substantially concentric weights engaged by one or more capturing rods which can be extended from or retracted into a rotatable handle. As the handle is rotated in a first direction, the rods extend through consecutive weights to add weight and by rotating the handle in a second direction weight can be removed from the weight package. The weights can come in a variety of shapes but preferably they will be in the shape of cylinders, squares, or hexagons, for example, such that by disposing the handle across a central axis the weight can be centered.
    Type: Application
    Filed: January 23, 2024
    Publication date: July 24, 2025
    Applicant: 50 Cal Fitness, LLC
    Inventors: Derek J. DUNBAR, Cody W. ENGELMOHR, Zachary T. HALL
  • Publication number: 20240366994
    Abstract: The present invention relates to a multi-functional weight bar assembly including selectively repositionable handles to carry out various weight lifting exercises with a single bar. The weight bar may include an opening to accommodate the user's upper torso if desired during certain exercises allowing the weight to be positioned lower than normal. By moving the handles inwardly or outwardly along the weight bar or angling the handles as desired, various muscle groups can be targeted with a single weight bar assembly.
    Type: Application
    Filed: January 23, 2024
    Publication date: November 7, 2024
    Applicant: .50 Cal Fitness, LLC
    Inventors: Derek J. DUNBAR, Cody W. Engelmohr, Zachary T. Hall
  • Publication number: 20230302321
    Abstract: A weight support assembly for attachment to a lever arm pivotably connected to an exercise rack in a manner whereby weight can be positioned out in front of the rack for a more efficient work out is provided. The assembly is made of highly durable materials and can be readily attached and detached from the lever arm as needed.
    Type: Application
    Filed: January 27, 2023
    Publication date: September 28, 2023
    Applicant: .50 Cal Fitness, LLC
    Inventors: Derek J. DUNBAR, Cody W. Engelmohr