Septic system with level control
US4042497A · kind A · utility
15Cited by
8References
19Claims
0Family size
Inventor
Key dates
| Filing date | Dec 11, 1975 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Dec 11, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Liquid waste material passes from a septic tank to a holding tank prior to being pumped into a tiled drain field. The liquid waste material is only pumped into the drain field when the liquid saturation of the soil in and around the drain field is below a predetermined level. The saturation level is determined by RF admittance sensing probes which extend into the soil in the area of the drain field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.