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Subsurface irrigation
专利权人:
Kenneth Owen Richardson
发明人:
Kenneth Owen Richardson
申请号:
US14729886
公开号:
US09521813B2
申请日:
2015.06.03
申请国别(地区):
US
年份:
2016
代理人:
摘要:
A subsurface emitter includes a piston valve both preventing water from draining from the system, and blocking the entry of roots and soil into the emitter body. A nozzle is present at one or both ends of a vertical tube. A piston is held in a normally closed position by a spring in the absence of water pressure, covering ports in the nozzle. When sufficient water pressure in provided, the spring is compressed and the nozzle uncovers the port providing a subsurface spray of water. The spray of water is sufficient to clear mineral deposits which otherwise may accumulate and block the port.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/
相关发明人
kenneth owen richardson
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