Patents Assigned to Insul-Rib, Inc.
  • Inflatable greenhouse vent cover
    Patent number: 4672888
    Abstract: Expandable vent closure apparatus for a greenhouse comprising a clear inflatable mat, the opposed surfaces of which are sealed to one another to form a plurality of horizontal tubular members and a plurality of internal air passages connecting one to the other. Air means connected to the uppermost tubular section inflates the mat within a wall mounted support assembly from the top down to seal the vent opening or upon deflation to open the vent.
    Type: Grant
    Filed: January 3, 1985
    Date of Patent: June 16, 1987
    Assignee: Insul-Rib, Inc.
    Inventors: Terence G. Crombie, Bernard K. Wong