Process for controlling a high-pressure cleaner and high-pressure cleaner for implementing said process
US4613074A · kind A · utility
130Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1984 |
| Grant date | Sep 23, 1986 |
| Priority date | — |
| Expiry date | Mar 22, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8326
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a high-pressure cleaner, in order to control additional equipment, such as chemical doser or burner, from a hand spray gun without any special control lines, it is proposed to connect a second closable flow path in parallel with the normal flow path through the spray nozzle, to determine the pressure rise time in the cleaning fluid after the switching on of the high-pressure pump and to generate a control signal by opening the second flow path to extend said rise time compared with the rise time when the second flow path is closed; furthermore, a high-pressure cleaner is proposed for implementing this process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.