Self-regulated fertilizing irrigation system with ground and over-the-crop dispensing means and snow-forming frost protection means
US6039267A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 7, 1998 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Dec 7, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01G17/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A duct made of flexible material, comprising a plurality of spaced dispensers and regulator valves. Each dispenser is provided with two ports, one for ground dispensing and the other one for over-the-crop dispensing; the ports are controlled by respective differential membrane valves. The ports are supplied by separate system sections, one at low pressure and the other one at high pressure, which comprise respective pipes which are supplied by corresponding motorized pump units at low and high pressure respectively; the pipes are joined in a single duct with side-by-side passages provided with a cross-section shaped substantially like a figure-of-eight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.