Piston valve
US5797590A · kind A · utility
0Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1997 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | May 22, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8376
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A piston valve for liquids provides potential isolation between an inlet-side and an outlet-side liquid. The piston valve is suitable, in particular, for controlling water-based paints in painting appliances which operate by electrostatic charging. At least one control electrode which is at the electric potential of the liquid present at the outlet of the valve is provided in order to improve the service life of the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.