Rotary sprinkler drive assembly with filter screen
US5785248A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1996 |
| Grant date | Jul 28, 1998 |
| Priority date | — |
| Expiry date | Feb 22, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B15/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A gear drive assembly for a rotary sprinkler includes a drive housing in which a reduction gear train is enclosed. A turbine located beneath one end of the drive housing rotates the gear train through a turbine shaft that extends into the drive housing. An output shaft extends out of the other end of the drive housing for rotating the nozzle assembly of the rotary sprinkler. The drive assembly includes a relatively large water entry port which is screened by a filter screen having relatively small openings. The water entry port allow enough water to enter the drive housing upon initial pressurization of the sprinkler such that sand particles suspended in the water do not jam the output shaft or the turbine shaft. The openings in the filter screen prevent the entry of particles into the drive housing that would tend to jam or foul the reduction gear train.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.