发明授权
- 专利标题: Freeze protection device for wall hydrants/faucets
- 专利标题(中): 墙壁消防栓/水龙头的防冻装置
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申请号: US10640970申请日: 2003-08-14
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公开(公告)号: US06769446B1公开(公告)日: 2004-08-03
- 发明人: William T. Ball , Cody W. Jackson , Lawrence Almasy
- 申请人: William T. Ball , Cody W. Jackson , Lawrence Almasy
- 主分类号: E03B712
- IPC分类号: E03B712
摘要:
A freezeless wall hydrant has a normally horizontal fluid inlet tube with an interior end and exterior end. A hollow valve fitting is rigidly secured to the interior end of the inlet tube for a connection to a source of pressurized fluid. A valve seat is located on an interior end of the valve fitting. An elongated hollow tube of a diameter less than the interior diameter of the inlet tube is positioned on the center line of the inlet tube and has inner and outer ends. A plug is rigidly secured to the inner end of the tube to close the inner end for fluid flow. A normally closed check valve is movably mounted in the tube to engage a valve seat on the plug, to open the tube for fluid therein under conditions of high fluid pressure in the inlet tube.
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