Patents by Inventor Bror Ingvar Erling Jansson

Bror Ingvar Erling Jansson 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).

  • Device for preventing the flow of air through an opening between two rooms or spaces
    Patent number: 4074620
    Abstract: An air barrier device for an opening in a wall including air flow generating members arranged at opposite boundary edges of the opening on both sides of the opening and arranged to direct individual curtains of air obliquely towards each other and into the spaces separated by the wall to thereby define a closed air volume. Air flow sensing members are positioned at the opening and are operable to modify the operation of the air flow generating members in response to the detection of a net flow of air through the opening to stop the net air flow.
    Type: Grant
    Filed: October 28, 1976
    Date of Patent: February 21, 1978
    Inventor: Bror Ingvar Erling Jansson