Vacuum toilet system with single pump
US6397407B1 · kind B1 · utility
10Cited by
15References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 6, 2001 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Dec 6, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8634
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A multi-position (e.g. three way) valve is operatively connected to a combined vacuum/holding tank for a vacuum toilet system, and to a pump capable of pumping both air and sewage. When the valve is in one position air is pulled from the tank through the pump to increase the vacuum level in the tank, e.g. to above 10 in/Hg. When the valve is moved to a second position by either a float or manual switch operation, the sewage is pumped out of the tank through the pump while surrounding air moves through the valve into the tank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.