发明名称 |
Automatic environment stabilizer and protection device for plants |
摘要 |
An attachment for a plant protection device is described that automatically maintains a life sustaining environment over a broad range of ambient temperature conditions. The invention consists of a cylindrical collar adapted to be mounted on top of existing open ended plant covers or to be manufactured as an integral part of such a cover and contains a thermostatically controlled butterfly valve for ventilating the plant cover. The thermostat is responsive to ambient temperature outside the plant cover which activates the butterfly valve for controlling the release of warm air from inside the container. The collar and butterfly valve are so designed to provide adequate light and ventilation without wind chill to the protected plants and also includes protection against flying insects and random or unwanted pollination.
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申请公布号 |
US4233779(A) |
申请公布日期 |
1980.11.18 |
申请号 |
US19790011790 |
申请日期 |
1979.02.14 |
申请人 |
GRIFFITH, JERRY |
发明人 |
GRIFFITH, JERRY |
分类号 |
A01G9/24;A01G13/04;(IPC1-7):A01G13/04 |
主分类号 |
A01G9/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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