GREENHOUSE Russian patent published in 1997 - IPC

FIELD: agriculture. SUBSTANCE: greenhouse has carcass with girder made from angles with trough faced outside. Troughs are formed from separate interconnected arcs with equal curvature radius, end columns fixed in supports and interconnected with their upper and side connecting members, which are formed as narrow straight connecting strips with longitudinal channel, and lower connecting member composed of arc-shaped wide strips with convex surface faced outside greenhouse and provided with screen. Ends of upper, side and lower convex connecting members are bent in accordance with surfaces of angles. Door with middle connecting member and end columns are provided with film cover fastening device having flexible arc-shaped wire. One end of wire is bent perpendicular to wire axis and inserted into openings of each end column and door and attached to them by pin and nut and other end is attached to columns and door by pin and nut. Pin is provided with opening. Greenhouse is further provided with hydraulic drive having pipe with flange and branch pipe and membrane fixed between them. Stem guiding ring fixed on other end of branch pipe has shoe and spring and angle engageable with apex and defining door frame. EFFECT: wider operational capabilities, increased efficiency and enhanced reliability in operation.