发明授权
- 专利标题： Retrofitting a fire hydrant with a replacement hydrant body containing a secondary valve
- 专利标题（中）： 用更换消防龙头改装消防龙头，装有二次阀
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申请号： US11838534申请日： 2007-08-14
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公开(公告)号： US07775231B2公开(公告)日： 2010-08-17
- 发明人: Tom R. Davidson, Sr. , David Phillips , Anthony Ferrari , David Michael Walden
- 申请人： Tom R. Davidson, Sr. , David Phillips , Anthony Ferrari , David Michael Walden
- 申请人地址： US GA Sunny Side
- 专利权人： Davidson Hydrant Technologies, Inc.
- 当前专利权人： Davidson Hydrant Technologies, Inc.
- 当前专利权人地址： US GA Sunny Side
- 代理机构： Kilpatrick Stockton LLP
- 主分类号： E03B9/02
- IPC分类号： E03B9/02 ; F16K15/18
摘要：
The present invention relates to methods and devices for retrofitting fire hydrants with additional structure for reducing the potential that those with ill intent can foul municipal water supplies by introducing toxins or other materials into fire hydrants. Various embodiments include a replacement hydrant body having an enlarged diameter portion that can be installed to replace an existing hydrant body. The replacement hydrant body can include a secondary valve comprising a seat, biasing structure, and a restriction member to close off portions of the hydrant otherwise available for receipt of toxic or other materials when the fire hydrant nozzle cap is unscrewed and open.
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