Irrigation sprinkler with pivoting throttle valve
US6241158A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2000 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Mar 30, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B15/74
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pop-up rotor type irrigation sprinkler has a pivotable butterfly valve body located in its riser just below the nozzle. The valve body is selectively pivotable between fully open and fully closed positions by manually turning a drive member mounted in the upper end of the riser with a hand tool. The drive member is connected to the valve body with a linkage that extends within the riser outside of the water flow path to avoid adversely affecting the water stream ejected from the nozzle. The valve body has an elliptical shape and is curved in section and downwardly concave when in its closed position. Due to its curved shape, the valve body can pivot to its vertical open position in which it rests parallel with the curved cylindrical interior wall of an internal flow tube to minimize flow resistance. Due to its elliptical shape, the valve body can pivot to its substantially horizontal position in which its peripheral edges are snug up against the cylindrical interior wall of an internal flow tube in order to achieve a substantial seal. Tolerance problems that would otherwise be associated with a circular butterfly valve are avoided. The downwardly concave shape of the valve body w…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.