Electrostatic spray device provided with electric-arc protection means
US4737887A · kind A · utility
15Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Oct 1, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B5/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electronic safety device to prevent electrical arcing in electrostatic sprayer apparatus for spraying material such as paint comprises a device for generating a very low voltage AC signal in a fixed supply and control unit and a voltage step-up device in a mobile sprayer. A device sensitive to variations in the alternating current flowing in the conductors linking the generating device to the step-up device is connected to a disabling device capable, for example, of blocking the generating device when too sudden a current variation is measured, since such a current variation may precede electrical arcing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.