Vent cap assembly for a monitoring well
US4370919A · kind A · utility
20Cited by
8References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1981 |
| Grant date | Feb 1, 1983 |
| Priority date | — |
| Expiry date | Jan 29, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/5637
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Vent cap assembly for a monitoring well permits venting from a well riser pipe while positively preventing contamination of the well by vandals. Tabs having apertures are integrally attached to the pipe and to an axially elongated vent cap. A padlock may be placed through the apertures to prevent unauthorized removal of the cap, but whether or not the cap is locked, the tab on the riser pipe causes the inner end surface of the cap to be spaced slightly above the riser pipe to insure that venting will always be possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.