发明授权
- 专利标题： Plumbing drainage system
- 专利标题（中）： 管道排水系统
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申请号： US556650申请日： 1990-07-20
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公开(公告)号： US5144699A公开(公告)日： 1992-09-08
- 发明人: Kenneth Graham
- 申请人： Kenneth Graham
- 专利权人： Kenneth Graham
- 当前专利权人： Kenneth Graham
- 主分类号： E03C1/12
- IPC分类号： E03C1/12 ; E03C1/30
摘要：
A plumbing drainage system has a plumbing stack with a clean-out hole formed therein. A drainage device for controlled drainage of the plumbing stack includes a device for connecting the drainage device to a plumbing stack at the clean-out hole formed in the plumbing stack. A shut-off valve is connected downstream of the first connecting device. A second connecting device is connected downstream of the shut-off valve for connection to a drainage hose.
公开/授权文献
- US5779156A Spray dispenser and system for spraying viscous liquids 公开/授权日：1998-07-14
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