Method and apparatus for controlling a solenoid within an electric dispensing gun
US6061225A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 3, 1999 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | May 3, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H47/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A driver circuit is provided to control current flow through a solenoid coil of an electric liquid dispensing device including a valve element and a dispensing orifice. The driver circuit includes a bidirectional current source coupled to the solenoid coil for applying current in opposite directions through the coil. In a forward current direction, a magnetic attraction is created between the solenoid coil and the valve element to retract the valve element from the dispensing orifice. In a reverse current direction, a magnetic repulsion is created between the solenoid coil and the valving element to force the valving element toward the dispensing orifice. The magnetic flux generated in the solenoid coil by the forward current is calculated, and the reverse current is applied to substantially demagnetize the solenoid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.