Greenhouse venting system
US6089973A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 1998 |
| Grant date | Jul 18, 2000 |
| Priority date | — |
| Expiry date | Jul 23, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A40/25
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In accordance with the present invention, there is provided a new and inexpensive ventilating system for greenhouses using rigid plastic, glazing panels that are thin, lightweight, and quite long. This is achieved by bending outer ends of the glazing panels and lifting to create vent openings. This method takes advantage of the inherent flexibility of these glazing panels to bend them to shift between open and closed positions without the use of a conventional, separate hinged, framework section. Particularly, in accordance with the present invention, an actuator is connected to a flexible bendable portion of the elongated, rigid glazing panel and the actuator lifts and bends an end portion of the panel, which has an inherent flexibility unlike glass or thin films and which has a memory and an elasticity, such that the panel wants to return to its normal unflexed position, which is the closed position, in the preferred embodiment of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.