# US 4,399,738 A · Ventilating structure for greenhouse

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- Number: US 4,399,738 A
- Document ID: US4399738A
- Status: Granted
- Kind: A
- Application number: 06/220,837
- Filed: 1980-12-29
- Granted: 1983-08-23
- Earliest claimed: 1980-12-29
- Inventors: Arlis F. Sharkey
- Web page: https://patentgrep.com/patent/US4399738A

## CPC

- A01G 9/242: {for greenhouses with flexible coverings}
- Y02A 40/25: Greenhouse technology, e.g. cooling systems therefor
- A01G: HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING (picking of fruits, vegetables, hops or the like A01D46/00; propagating unicellular algae C12N1/12)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## 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.

## Claims

### Claim 1

Inflatable air vent regulating means for a greenhouse, having in combination
a greenhouse structure convex in cross section having a ridge portion and side wall portions,
an air vent open to the atmosphere formed in said ridge portion,
an inflatable substantially tubular member having closed ends and being coextensive with said vent,
means mounting said tubular member adjacent said vent,
a pressurized air supply,
an air line running from said air supply to said tubular member to inflate the same,
a plate member depends inwardly of said greenhouse from each side of said vent and adjacent each side of said tubular member,
whereby said tubular member in inflated condition engages and seals against said plate members.

### Claim 2 (depends on 1)

The structure of claim 1, wherein
said means comprises a unitary member coextensive with said vent.

### Claim 3 (depends on 1)

The structure of claim 1, wherein
said means comprises a cable substantially centrally longitudinally of said vent extending through said tubular member.