Patents by Inventor Sten Engwall

Sten Engwall 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).

  • Publication number: 20080164333
    Abstract: The invention relates to a building heating system which includes an insulated foundation (9) beneath the lowermost (12) of the building. According to the invention, the system comprises at least one heat pump (1, 2) that includes a heat absorbing side (2) located in the foundation space (9). The system also includes means (23) for distributing air from the foundation space (9) to spaces situated above the floor (12). The system also includes means (7) for delivering external air to the foundation space (9). The invention also relates to a method of heating a building.
    Type: Application
    Filed: February 24, 2006
    Publication date: July 10, 2008
    Inventors: Sten Engwall, Per-Ake Engwal Von Scheele
  • Patent number: 6185879
    Abstract: The present invention relates to a house building module for module systems used in house building and methods in connection herewith. According to the invention, the module includes cellular plastic and U-sections of metal fitted into the cellular plastic as well as at least one concrete reinforcement extending in the longitudinal direction of the module. A house building module according to the invention can be comprised of a wall portion with integrated foundation portion (70). For casting the concrete reinforcement a method is applied in which the module per se constitutes a casting mold.
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: February 13, 2001
    Inventor: Sten Engwall
  • Patent number: 5678495
    Abstract: A device for the combustion of solid fuels so as to provide complete combustion from the start and thereby reduce environmental influence and the generation of carcinogens, includes two chambers interconnected by a ceramic filter, which chambers have one or more heat sources, one chamber being adapted for drying and degasification of the fuel and the other chamber being adapted for combustion of the gas generated on degasification. The heat sources are mainly connected with the solid-fuel device to act at an initial stage until combustion takes place in a normal way so that complete combustion may be achieved from the start.
    Type: Grant
    Filed: April 29, 1996
    Date of Patent: October 21, 1997
    Assignee: System Teeg AB
    Inventors: Ulf Johansson, Sten Engwall
  • Patent number: 5544453
    Abstract: A building construction in which a floor story of the building rests on a foundation which, in turn, lies on the ground. An insulated and separate service space has been created beneath the floor story of the living accommodation, with room for accommodating heating, ventilation, and water supply systems as well as electrical systems. The insulated service space is formed mainly by the floor story of the building, a ground insulating layer, and a surrounding foundation wall. A gap is provided between the insulated service space and the first story with the gap extending along the inside of each foundation wall. A heating source is provided within the service space and exhausts heated air directly into the service space with the heated air flowing upwardly through the gap into the first story area.
    Type: Grant
    Filed: November 9, 1993
    Date of Patent: August 13, 1996
    Assignee: System Teeg AB
    Inventor: Sten Engwall
  • Patent number: 4303225
    Abstract: Known winches for sailing boats have flanges which are perpendicular to the axis of rotation. The instant invention comprises a self-tailing winch in which the upper flange is inclined in relation to the axis of rotation and follows the rotation of the drum. In operation, the rope rises along the drum as it is taken up by the winch. When the rope has reached the underside of the flange, it is automatically clamped, and, since the flange is inclined, the rope will become loose during rotation of the flange as the drum lets out the rope.
    Type: Grant
    Filed: September 10, 1979
    Date of Patent: December 1, 1981
    Assignee: Sten Engwall
    Inventors: Sten Engwall, Clifford K. Fitch