Self-cleaning non-return drainage valve
US4059127A · kind A · utility
4Cited by
3References
9Claims
0Family size
Inventor
Key dates
| Filing date | Feb 27, 1976 |
| Grant date | Nov 22, 1977 |
| Priority date | — |
| Expiry date | Feb 27, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7436
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A non-return drainage valve adapted for use with a container for drainage of fluids from the container through the valve and for prevention of the passage of liquid into the container, the valve including a buoyant plug member and probe means movable with the plug member for clearing debris from the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.