Patents Assigned to Alfred Boettcher
  • Solar energy collector, and water heater and heating device with a heat pump containing the said collector
    Patent number: 4404958
    Abstract: A solar energy collector comprises plastic sheets superposed to delimit a tube for circulation of a gas to be heated by contact with radiant heat absorbing means in the collector, and an insulating chamber communicated with the tube by means of at least one aperture. Separate inflation means for the insulation chamber is not needed as the heat transfer gas inflates both the tube and the insulation chamber, rendering the collector less liable to damage by overheating upon deflation of the tube.
    Type: Grant
    Filed: July 14, 1980
    Date of Patent: September 20, 1983
    Assignee: Alfred Boettcher
    Inventor: Alfred Boettcher