Ventilating structure for greenhouse

Details Ventilating structure for greenhouse Ventilating structure for greenhouse

1980-12-29

1983-08-23

Makay, Albert J.

Valves and valve actuation

Rotary valves

Ball valve

47 17, 98 41R, 251 611, F24F 1310

Patent

active

043997384

ABSTRACT:
This invention relates to an improvement in the ventilation of a greenhouse and it consists of an elongated tubular inflatable member mounted to underlie an air vent extending along the ridge portion of the greenhouse and a second vent consisting of an elongated opening in the side wall of the greenhouse, each of the vents having an inflatable tubular member carried adjacent thereto whereby the inflatable members in deflatable condition permit the circulation of outside air from the side vent through the ridge vent and an air pump having a line running to each of the inflatable members inflating the same to seal the vents.

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patent: 3869826 (1975-03-01), Fischer
patent: 4055030 (1977-10-01), Earnshaw
patent: 4250941 (1981-02-01), McNally

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