Root fertilizing device
US4726143A · kind A · utility
20Cited by
8References
8Claims
0Family size
Inventor
Key dates
| Filing date | Mar 24, 1987 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | Mar 24, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01G29/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The device is a cylindrical housing enclosing a spaced apart cylindrical receptacle for fertilizer. Metering rings channel rain water towards the fertilizer but prevent fertilizer from exiting the top of the housing. End grates enclose the open ends of the housing, the top grate containing a water permeable filter to prevent clogging of the device by foreign debris.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.