Actuators for electrostatically charged aerosol spray systems
US5400975A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1993 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Nov 4, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B5/1691
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An actuator for electrically charging an aerosol spray has an inductor located adjacent to the spray nozzle to induce a charge on the atomized fluid. Charge to the inductor is provided by a piezoelectric crystal which is stressed by movement of an operating member to open the spray valve. Inductor charging utilizes negligible electrical power so that additional power sources are not required. The crystal may be stressed continuously such as by squeezing, or intermittently, such as by striking. When an intermittent stressing is utilized, the electrical circuit includes a switch between the crystal and inductor which is opened as the valve is opened to isolate electrically the inductor during spraying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.