Riser for an irrigation sprinkler
US4834290A · kind A · utility
10Cited by
7References
4Claims
0Family size
Inventor
Key dates
| Filing date | May 19, 1987 |
| Grant date | May 30, 1989 |
| Priority date | — |
| Expiry date | May 19, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B15/74
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved riser for a pop up sprinkler system wherein the riser is supported by a single flexible diaphragm relative to the supporting housing and an elastic rope acts as the return member for the riser and holds the riser in a vertical position when extended.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.