FIELD: agriculture. SUBSTANCE: hothouse ventilation system has a roof framework with trays 1, roof ridges 2, and driven roof air vent windows. Roof ridges 2 are provided with external T-shaped pillars 5, and the air vent windows are mounted on hangers 6 for rocking on pillars 5. Carriers 9 are hinged to the air vent windows, and they are also hinged tp connecting rods engaged with engines 14 and 15 by means of a rack-and-pinion mechanism. EFFECT: higher efficiency. 3 cl, 2 dwg
Title | Year | Author | Number |
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HOTHOUSE VENTILATION SYSTEM | 1992 |
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Authors
Dates
1995-11-20—Published
1992-07-16—Filed