发明名称 |
Freeze resistant automatic draining wall hydrant with dual check vacuum breaker |
摘要 |
The wall hydrant is automatically draining, providing freeze resistant, and includes protections against contamination of a building's potable water supply from the backflow of water in an attached hose. In particular, a dual check hose connection backflow preventer provides protection against back pressure from a hose fill of water which is elevated 10 feet. In addition, protection is provided from back siphonage due to a reduction of pressure in the potable water system within the building. Finally, a biased open atmospheric vent is located between the two independent checks to further assure the protection against backflow from the hose to the potable water system.
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申请公布号 |
US6752167(B1) |
申请公布日期 |
2004.06.22 |
申请号 |
US20020158531 |
申请日期 |
2002.05.30 |
申请人 |
JAY R. SMITH MANUFACTURING COMPANY |
发明人 |
STANALAND WILLIAM A.;BUEHLER STEPHEN L. |
分类号 |
F16K15/18;F16K24/02;F16K27/00;(IPC1-7):F16K24/02 |
主分类号 |
F16K15/18 |
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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