Riser or pop-up irrigation sprinkler
US4919332A · kind A · utility
13Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 1, 1988 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Mar 1, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B15/74
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A diaphragm type riser for an irrigation sprinkler including a coil compression spring that acts against the diaphragm for urging the riser to its retracted position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.