Pop-up sprinkler unit with floating sleeve
US5423486A · kind A · utility
67Cited by
10References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1994 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Apr 11, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B15/74
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pop-up sprinkler unit for mounting beneath the surface of a soil formation includes an outer cylindrical housing for subsurface mounting, with an inner housing carrying a nozzle and drive turbine with a protective sleeve of a grit resistant material reciprocally mounted between the inner and outer housings for extending with the inner housing up through a portion of the soil for deflecting grit from between the sleeve and housing when the inner housing and sleeve is retracted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.