Water sprinkler
US4269354A · kind A · utility
Inventor
Key dates
| Filing date | Jun 25, 1979 |
| Grant date | May 26, 1981 |
| Priority date | — |
| Expiry date | Jun 25, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S239/01
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A water sprinkler develops any of several predetermined patterns of water coverage of regular or irregular shape and of varying sizes. The sprinkler includes first a plurality of pattern-defining apertures which are contoured to pass varying but predetermined amounts of water from a fixed sampling aperture as a sprinkler nozzle rotates in either or both angular directions about a vertical axis. Pattern size is incrementally adjustable in one embodiment by a member having tapered apertures of varying sizes interposed between the fixed sampling aperture and the pattern-defining apertures. Pattern size and shape are finely adjusted by a parallel flow line including a valve for providing small additional or slightly reduced flow volumes. Rounded patterns are effected entirely through the parallel flow line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.