Detachable cylindrical power supply for induction type electrostatic spray gun
US4120016A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1976 |
| Grant date | Oct 10, 1978 |
| Priority date | — |
| Expiry date | Nov 5, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/3381
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A light-weight, portable power pack for supplying a high voltage output to an electrostatic spray gun from a low voltage input is disclosed. The power pack is cylindrical in shape with an axial opening adapted to receive the discharge channels of the spray gun so that it may be mounted on and may form a part of the spray gun and is detachable therefrom for replacement purposes. The power pack comprises a power supply circuit including a square wave oscillator connected through a square-loop, tape-wound core transformer to a voltage multiplier network for converting a low voltage DC to a high voltage DC for induction charging of material discharged from the spray gun, the circuit being encapsulated in an epoxy resin material to provide a suitable mounting case therefor. The case is molded into a suitable shape and is attached to the front of the gun by means of screws, bolts, a bayonet type connection or other suitable fastening means, the power pack being provided with external contacts which serve to engage corresponding contacts on the spray gun to provide an electrical connection through the gun to the power source, which may be a battery pack carried by the operator, and to eng…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.