GREENHOUSE Russian patent published in 2002 - IPC

FIELD: agriculture. SUBSTANCE: greenhouse has carcass and light-transmitting film covering fixed to carcass. Upper girder is composed of symmetrical ridge beams 3,4 of rectangular profile, which are detachably secured with their side surfaces to one another. Arched member is formed of two arced bars symmetrically arranged with respect to longitudinal plane of symmetry of greenhouse. Lower end of each arced bar is joined to related bar of base and upper end of arced bar is rigidly connected to related ridge beam. Each end of greenhouse is comprised of two leaves 7,8. Each of leaves is composed of upper rack 9 and lower rack 10. When leaves are in closed position, their upper racks 9 adjoin to one another and their lower racks 10 are arranged at an angle to one another in plane of base. Leaves are enclosed in film cover and define conical surface of greenhouse ends. Lower end of each arced bar may be connected to related base bar through pivot joint. Each part of carcass is positioned for rotation relative to longitudinal horizontal axis extending through pivot joints and for fixation thereof in inclined position. It results in opening of vent hole in upper (ridge) part of greenhouse. EFFECT: simplified construction and improved operational characteristics. 7 cl, 3 dwg