Sewer line restriction alarm placed in clean out plug
US5006833A · kind A · utility
36Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1989 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Jul 25, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03F2201/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A restricted flow alert for use in the access arm of the main clean-out plug location in a commercial or residential sewage system includes a diaphragm which moves in response to the presence of to close a switch and actuate an alarm. A pneumatic time delay prevents the alarm from being actuated in response to transient flow conditions in the sewer line and allows operation of the alarm at any physical orientation relative to the axis of the body of the restricted flow alert.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.