Patents by Inventor Stuart Craig MacKinnon

Stuart Craig MacKinnon 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).

  • Methods of controlling a lawn mower having electric drive and blade motors
    Patent number: 8966870
    Abstract: A vehicle such as a riding lawn mower may have at least one electric drive motor configured to drive at least one wheel, at least one electric blade motor configured to drive at least one cutting blade, and a battery module connected to the drive and blade motors. According to some embodiments, a method of controlling the vehicle may include: operating the blade motor according to a blade target speed; monitoring a blade current load for the blade motor; comparing the blade current load to a light load low threshold for the blade motor; and if the blade current load is less than the light load low threshold, decreasing the blade target speed.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: March 3, 2015
    Assignee: Accelerated Systems Inc.
    Inventors: Stuart Craig MacKinnon, Robert Gordon Lankin, Jason Cornelius Wiseman, Christopher Keith Derbecker