GREENHOUSE Russian patent published in 1994 - IPC

FIELD: agriculture. SUBSTANCE: greenhouse has a framework with lateral frames 1 and ridge purlins 2, light-transparent covering 3 which opens inside the greenhouse, and split air-vent panels 4 secured in pairs on detachable hinges 5. For air-tightness, covering 3 is pressed against panel 4 with overlap 6 held down with lateral cords 7. Panels 4 of each pitch are opened by a self-contained mechanism. The mechanism has longitudinal ties 9 coiled on a drum of winch 10 and ropes 11 passing over pulleys 12 and attached to the ridge ends of panels 4. In opening, the latter drop on ropes by gravity. The closure proceeds in the reverse order. For installation of the covering, the panels are dropped on support 13, the opposite ends are taken from hinges 5, and the panels are secured on installation pins 14 at a level convenient for doing installation work on the ground. EFFECT: lower material usage, lower consumption of labor in installation, simpler air-vent opening mechanism. 2 cl, 8 dwg