Drainfield funnel
US5117878A · kind A · utility
24Cited by
13References
12Claims
0Family size
Inventors
Key dates
| Filing date | Apr 29, 1991 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Apr 29, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67C11/02
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A drainfield funnel having a substantially horizontal drain surface sloping towards an opening, a substantially vertical rim around the perimeter of the drain surface and a tube extending down from the opening. The slope of the drain surface is less than 10 degrees. Preferably, the drain surface is uneven, having ridges and channels aligned with the opening. Additionally, a relatively horizontal lip extends from the top of the rim towards the interior of the device. In another embodiment, an annular shoulder connects the opening to the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.