Patents by Inventor Thomas Hägglund

Thomas Hägglund 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: 7603987
    Abstract: A fuel injection pump for a piston engine, the pump comprising a cylinder element having a pressure plenum provided with an outlet chamber for removing pressurized fuel from the pressure plenum, a piston arranged to reciprocate inside the pressure plenum, an inlet chamber arranged outside the pressure plenum and at least one inlet channel arranged between the pressure plenum and the inlet chamber. At least one fill channel provided with a non-return valve is arranged between the pressure plenum and the inlet chamber, the valve allowing fuel flow from the inlet chamber to the pressure plenum but preventing flow from the pressure plenum to the inlet chamber.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: October 20, 2009
    Assignee: Wartsila Finland Oy
    Inventors: Matti Koivunen, Matts Friis, Thomas Hägglund
  • Publication number: 20090178649
    Abstract: A fuel injection pump for a piston engine, the pump comprising a cylinder element having a pressure plenum provided with an outlet chamber for removing pressurized fuel from the pressure plenum, a piston arranged to reciprocate inside the pressure plenum, an inlet chamber arranged outside the pressure plenum and at least one inlet channel arranged between the pressure plenum and the inlet chamber. At least one fill channel provided with a non-return valve is arranged between the pressure plenum and the inlet chamber, the valve allowing fuel flow from the inlet chamber to the pressure plenum but preventing flow from the pressure plenum to the inlet chamber.
    Type: Application
    Filed: November 1, 2006
    Publication date: July 16, 2009
    Applicant: Wärtsilä Finland OY
    Inventors: Matti Koivunen, Matts Friis, Thomas Hägglund
  • Patent number: 7013846
    Abstract: Arrangement in connection with a diesel engine comprising an air supply system for the diesel engine for supplying suction air to the engine from the environment, the air supply system comprising at least a channel arrangement, a compressor and a heat exchanger for suction air and a cooling circuit for the diesel engine, to which circuit at least one heat exchanger is connected. The heat exchanger connected to the cooling circuit, which recovers waste heat from the diesel engine, is arranged to evaporate water by the heat received from the cooling circuit. The invention also relates to a corresponding method.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: March 21, 2006
    Assignee: Wartsila Finland Oy
    Inventors: Thomas Hägglund, Harry Holmgren