发明公开
EP0278746A2 Air admittance valve for use in drainage systems
失效
Belüftungsventilzur Benutzung在einemDränagesystem。
- 专利标题： Air admittance valve for use in drainage systems
- 专利标题（中）： Belüftungsventilzur Benutzung在einemDränagesystem。
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申请号： EP88301115.7申请日： 1988-02-10
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公开(公告)号： EP0278746A2公开(公告)日： 1988-08-17
- 发明人: Earl, Raymond Frederick
- 申请人： Earl, Raymond Frederick
- 申请人地址： 7 Northdown Stockbury Kent. ME9 7UL GB
- 专利权人： Earl, Raymond Frederick
- 当前专利权人： Earl, Raymond Frederick
- 当前专利权人地址： 7 Northdown Stockbury Kent. ME9 7UL GB
- 代理机构： Carmichael, David Andrew Halliday
- 优先权： GB8703132 19870211
- 主分类号： E03C1/122
- IPC分类号： E03C1/122 ; E03F5/08
摘要：
An air admittance valve for use in drainage systems comprising a housing (10) with an opening (12) therein through which air passes into the drainage system, and a pivoted closure member (18) adapted to close the opening (12) and openable on a pressure difference between the system and the exterior.
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