Check valve for vacuum sewage pipe and vacuum sewage system
US8028715B2 · kind B2 · utility
6Cited by
14References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2006 |
| Grant date | Oct 4, 2011 |
| Priority date | — |
| Expiry date | Apr 27, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7903
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention provides a check valve for use in a vacuum sewage pipe. The check valve includes a body having a sewage inlet and a sewage outlet to be coupled to the vacuum sewage pipe, a flap valve element disposed in the body and rotatably supported by a first shaft, and a closing mechanism. The closing mechanism can keep the flap valve element in a closed state so as to allow the flap valve element to function as a gate valve. The closing mechanism can also limit an opening degree of the flap valve element so as to allow the flap valve element to function as a check valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.