Electrostatic disabling switch for electrostatic spray guns
US4441656A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1982 |
| Grant date | Apr 10, 1984 |
| Priority date | — |
| Expiry date | Jan 29, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B5/0531
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An electrostatic spray gun is provided with electrostatic power circuitry for supplying high voltage power to an electrode with a switch for enabling and disabling the circuitry, the switch being operated by movement of a trigger controlling flow of a coating fluid through the spray pistol. The switch is a magnetic switch normally open, but closeable by a magnet positioned adjacent the switch, the trigger having means to shunt the magnetic field allowing the switch to open when the trigger is closed and allowing the switch to close when the trigger is open. A second magnet is provided movable towards and away from the first magnet whereby the second magnet effectively shunts the magnetic force of the first magnet when moved adjacent thereto to prevent closure of the switch independent of movement of the trigger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.