Spraying device with an insulated storage tank for electrically conductive coating product
US5310120A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1993 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Aug 3, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B13/0452
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An electrostatic device for spraying electrically conductive liquid coating product comprises a storage tank for the product in which the product is at a high voltage. The tank is defined in a substantially cylindrical cavity formed in an insulative material body and inside in which is a piston forming in the cavity a mobile wall separating a coating product chamber from an actuation chamber filled with an electrically insulative actuation fluid. The body is fixed to a conductive material socket which is grounded and to which is connected an actuation fluid supply circuit extending between the socket and the actuation chamber and discharging into the actuation chamber near a back wall of the cavity which is not in contact with the coating product. A section of the supply circuit runs substantially parallel to the cavity in the direction away from the socket starting from the back wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.