Patents by Inventor Matthew Calvert

Matthew Calvert 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).

  • Safety locking device
    Publication number: 20080067784
    Abstract: A safety locking device 18 for a quick hitch/coupler 10 of an earth working machine. The safety locking device 18 has a locking element 21 which is biased into a locking position to automatically lock a front pin of an implement when it is engaged in the hook 14 of the coupler 10. The safety locking device 18 has an hydraulic operable mechanism to move the locking element 21 to an unlocking position. The hydraulic supply to the safety locking device 18 is independent of the hydraulic supply to a locking mechanism 16 of the coupler 10.
    Type: Application
    Filed: May 2, 2007
    Publication date: March 20, 2008
    Applicant: WEDGELOCK EQUIPMENT LIMITED
    Inventors: Matthew Calvert, David Calvert