Patents by Inventor Adrianus J. Hengelmolen

Adrianus J. Hengelmolen 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).

  • Hot gas blower with laminated fan blades and cooling system therefor
    Patent number: 5114309
    Abstract: The fan blades of a hot gas blower are cooled by the forced passage of cooling air or gas through the blades, the cooling air or gas being vented either into the hot gases or being isolated therefrom and being recirculated after cooling.
    Type: Grant
    Filed: August 16, 1990
    Date of Patent: May 19, 1992
    Assignee: Copermill Limited
    Inventor: Adrianus J. Hengelmolen
  • Scrap metal recycling furnace systems
    Patent number: 5049067
    Abstract: A scrap metal recycling furnace system comprises a dry hearth furnace, a closed well furnace, an afterburner chamber, a regenerator, a safety cooler and a fume purification plant operably interconnected by a plurality of conduits to form a system wherein exhaust gases from each component of the system can be selectively supplied to at least one other component of the system.
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: September 17, 1991
    Assignee: Copermill Limited
    Inventor: Adrianus J. Hengelmolen
  • Furnaces
    Patent number: 5035402
    Abstract: The furnace comprises two chambers, a closed well melting chamber and a main heating chamber. The furnace includes a hot gas duct connecting the chambers, the hot gas duct having a damper to control the gas flow between chambers in accordance with the respective condition of each chamber. The furnace is designed to have an efficient liquid metal flow by sloping the floor.
    Type: Grant
    Filed: October 20, 1988
    Date of Patent: July 30, 1991
    Assignee: Copermill Limited
    Inventor: Adrianus J. Hengelmolen
  • Pressure relief mechanism
    Patent number: 5029533
    Abstract: A safety door for a furnace or like apparatus is operable to open under the force of a hydraulic cylinder when the pressure under the furnace exceeds a predetermined upper limit corresponding to an abnormally high pressure caused by an explosion within the furnace or like apparatus. The safety door thereby prevents the furnace from being permanently damaged by an explosion.
    Type: Grant
    Filed: January 26, 1990
    Date of Patent: July 9, 1991
    Assignee: Copermill Limited
    Inventor: Adrianus J. Hengelmolen