Spray nozzle for electrostatic spraying of a coating product and facility for spraying a coating product including such a spray nozzle
US10549291B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2014 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | May 14, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B1/32
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A spray nozzle for electrostatic spraying of a coating product including a needle forming a mobile shutter of a valve for controlling the spraying, which is positioned in a recess of a barrel of the nozzle. The recess defines a surface for guiding the axial translation of the needle along a longitudinal axis of the recess. The needle includes a front shaped for abutting a seat to obstruct a duct for flow of the coating product, a rear portion which interacts with means for controlling the translation of the needle and a central portion comprised between the front end and the rear portion, while a high-voltage unit included in the nozzle is capable of applying a high-voltage to the front end of the needle. A raised portion provided on the central portion of the needle, inside the recess, can increase the electric creepage distance along the central portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.