1989-03-22
1990-09-11
Joyce, Harold
47 17, 52 2G, 52 2H, F24F 702
Patent
active
049552872
ABSTRACT:
A frame for a self-ventilated greenhouse, a self-ventilated greenhouse, and a method for controlling the air pressure between the layers of a double-layer roof for a greenhouse. The frame for the greenhouse comprises first and second parallel rows of upright sideposts; first and second sets of elongated, arcuate frame members; a plurality of cross-members hingedly connecting the sets of frame members; and means for separating and reuniting the sets of frame members. A roof for the greenhouse is provided by disposing first and second translucent sheets above the first and second sets of arcuate frame members, thereby conveting the frame into a greenhouse. The method comprises sealing the ends of a pair of sheets along their edges to form an inflatable pouch, disposing the sealed sheets above a frame to form a roof for a greenhouse, inflating the pouch, and controlling the pressure within the pouch with a back-pressure control valve.
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Joyce Harold
Roberts, Jr. Reginald F.
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