Patents by Inventor Dennis Kirian

Dennis Kirian 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).

  • Lift and grade control apparatus for tractor trencher
    Patent number: 8522461
    Abstract: A mechanical assembly controls the position of a trencher attached to a tractor and includes a positioning arm attached to the tractor at one end and the trencher at an opposite end. The positioning arm levers the trencher about a single fulcrum point on the positioning arm. A first lift cylinder has a base end connected to the tractor and an extendible end connected to the first positioning arm at the single fulcrum point. The positioning arm pivots about the tractor to move the trencher in response to the lift cylinder. Grade control cylinders are also attached to the positioning arm and the trencher to control the angular position of the trencher in relation to the ground below.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: September 3, 2013
    Inventor: Dennis Kirian
  • Lift and Grade Control Apparatus for Tractor Trencher
    Publication number: 20100139131
    Abstract: A mechanical assembly controls the position of a trencher attached to a tractor and includes a positioning arm attached to the tractor at one end and the trencher at an opposite end. The positioning arm levers the trencher about a single fulcrum point on the positioning arm. A first lift cylinder has a base end connected to the tractor and an extendible end connected to the first positioning arm at the single fulcrum point. The positioning arm pivots about the tractor to move the trencher in response to the lift cylinder. Grade control cylinders are also attached to the positioning arm and the trencher to control the angular position of the trencher in relation to the ground below.
    Type: Application
    Filed: December 4, 2009
    Publication date: June 10, 2010
    Inventor: Dennis Kirian