Return gas prevention device for drainage pipe
US11326334B2 · kind B2 · utility
0Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2020 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Jan 8, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7365
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present disclosure provides a return gas prevention device for a drainage pipe, belonging to the technical field of drainage pipes. The device realizes two functions of water seal and a check valve simultaneously, as well as prevents gas channeling in a drainage process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.