Patents by Inventor Stewart Parks Alexander, IV

Stewart Parks Alexander, IV 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).

  • Folding rollover protection system with vibration dampeners
    Patent number: 8424911
    Abstract: A folding rollover protection system includes an upper ROPS tube having a pair of ends hinged to a pair of ends of a lower ROPS tube. Resilient vibration dampeners are secured to each end of the lower ROPS tube and are compressed between each end of the upper ROPS tube and each end of the lower ROPS tube when the upper ROPS tube is in the upright position.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: April 23, 2013
    Assignee: Deere & Company
    Inventor: Stewart Parks Alexander, IV
  • FOLDING ROLLOVER PROTECTION SYSTEM WITH VIBRATION DAMPENERS
    Publication number: 20130049338
    Abstract: A folding rollover protection system includes an upper ROPS tube having a pair of ends hinged to a pair of ends of a lower ROPS tube. Resilient vibration dampeners are secured to each end of the lower ROPS tube and are compressed between each end of the upper ROPS tube and each end of the lower ROPS tube when the upper ROPS tube is in the upright position.
    Type: Application
    Filed: August 26, 2011
    Publication date: February 28, 2013
    Inventor: Stewart Parks Alexander, IV