ADJUSTABLE PITCH SCREENING SYSTEM FOR GREENHOUSES Russian patent published in 2005 - IPC

FIELD: agriculture, in particular, screening systems for greenhouses used in agricultural production, farms and house plots.

SUBSTANCE: screening system has additional bars in reduced length spans, said bars being out of connection with drive and mounted for progressive movement in parallel with main bars of greenhouse screening system. Carriers are secured on screening beam of previous span of greenhouse, above additional bars for supporting the latter. Carriers may be equipped with rollers. Such construction ensures predetermined mutual arrangement of previous span beam and additional bar during displacement thereof relative to one another and provides support for free end of additional bar. Stops are secured on additional bars on both sides of carrier at distance therebetween providing free movement for carrier upon displacement of screening beam of previous span. Free movement is adjusted by displacement of stops on additional bars, and value of said movement should provide reduced screening pitch of reduced span of greenhouse.

EFFECT: increased efficiency and enhanced reliability in operation of screening apparatus.

2 cl, 4 dwg