Sewage effluent volume control and alarm arrangement for pressurized sewage disposal system
US4230578A · kind A · utility
32Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1979 |
| Grant date | Oct 28, 1980 |
| Priority date | — |
| Expiry date | Apr 9, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D9/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Sewage effluent from a septic tank collects in a holding tank before being pumped out into a disposal field. The pump is turned on and off automatically by a control circuit which includes maximum and minimum level float switches in the holding tank, so that a predetermined volume of the effluent is discharged under pressure into the disposal field during each on-and-off cycle of the pump. A third float switch in the holding tank triggers an alarm whenever the effluent rises above a predetermined maximum level. The alarm signalling system may be silenced or tested by a manual switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.