Patents by Inventor Brad Allen Hoffman

Brad Allen Hoffman 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: 7634953
    Abstract: A neutral adjustment mechanism for dual lever steering controls. The dual lever steering controls include two levers that are each independently pivotable forward and reverse to drive a zero turning radius mower. The neutral adjustment mechanism includes a control pivot connected to each lever of the dual lever steering controls that pivots with forward and reverse pivoting of each lever. A steering link has a first end with an adjustment point, a ball joint adjacent the adjustment point connecting the steering link to the control pivot, and a second end pivotably connected to an input control lever of a hydrostatic transmission pump. An operator seat may be positioned over the steering links. Under the operator seat, adjustment access holes are provided for adjusting the steering links while the operator seat remains in place.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: December 22, 2009
    Assignee: Deere & Company
    Inventors: Brad Allen Hoffman, Frank P. Lewis
  • Publication number: 20080307918
    Abstract: A neutral adjustment mechanism for dual lever steering controls is disclosed. The dual lever steering controls include two levers that are each independently pivotable forward and reverse to drive a zero turning radius mower. The neutral adjustment mechanism includes a control pivot connected to each lever of the dual lever steering controls that pivots with forward and reverse pivoting of each lever. A steering link has a first end with an adjustment point, a ball joint adjacent the adjustment point connecting the steering link to the control pivot, and a second end pivotably connected to an input control lever of a hydrostatic transmission pump. An operator seat may be positioned over the steering links. Under the operator seat, adjustment access holes are provided for adjusting the steering links while the operator seat remains in place.
    Type: Application
    Filed: June 12, 2007
    Publication date: December 18, 2008
    Inventors: Brad Allen Hoffman, Frank P. Lewis
  • Patent number: 7430847
    Abstract: A dual lever steering control mechanism for a zero turning radius mower includes left and right steering levers that are independently pivotable fore and aft between reverse, neutral and forward positions. Steering lever grips are attached to and project from the steering levers. Each steering lever grip has a mounting surface with an electrical switch on the mounting surface, and a protective structure extending from the mounting surface.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: October 7, 2008
    Assignee: Deere & Company
    Inventors: Brad Allen Hoffman, Ashley Trent Moorehead, Kevin Patrick Lund
  • Publication number: 20080190085
    Abstract: A dual lever steering control mechanism for a zero turning radius mower includes left and right steering levers that are independently pivotable fore and aft between reverse, neutral and forward positions. Steering lever grips are attached to and project from the steering levers. Each steering lever grip has a mounting surface with an electrical switch on the mounting surface, and a protective structure extending from the mounting surface.
    Type: Application
    Filed: February 9, 2007
    Publication date: August 14, 2008
    Inventors: Brad Allen Hoffman, Ashley Trent Moorehead, Kevin Patrick Lund