Control circuit for airless spray gun
US4705995A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Aug 29, 1986 |
| Grant date | Nov 10, 1987 |
| Priority date | — |
| Expiry date | Aug 29, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M5/257
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An airless spray gun includes a pump piston and a drive arrangement formed of a coil and a swinging armature for connection to an alternating current network. A suppression circuit is provided for periodically suppressing an arbitrarily selectable whole number of successive half-waves of the alternating current. A plurality of phase control circuits corresponding in number to the number of suppression stages is also provided, each of the phase control circuits effecting a phase-angle of fixed size and being permanently connected to one of the suppression stages to supply a phase-delayed signal of selected frequency to the drive arrangement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.