Patents by Inventor Hans E. Josefsson

Hans E. Josefsson 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: 4214698
    Abstract: A heat control system for a discontinuously operated heat radiator of the co-tube type is disclosed. A thermostat located away from the radiator controls the opening and closing means of an inlet steam valve located between the steam feeder connection and the radiator. A condensed water outlet valve also located between the steam feeder connection and the radiator is normally biased closed by its own weight. When the inlet steam valve is open the steam pressure on each side of the outlet valve is equal and the outlet valve remains closed as the steam entering the radiator is condensed and backs up behind it. However, when the inlet steam valve is closed, the steam pressure in the radiator is eliminated so that the steam pressure in the steam feeder connection acts on the outlet valve to push it open and allow the condensed water to drain from the radiator into the steam feeder connection.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: July 29, 1980
    Assignee: Tour & Andersson Aktiebolag
    Inventor: Hans E. Josefsson