Spray gun having self-contained low voltage and high voltage power supplies
AssigneeSpeeflo Manufacturing Corporation
InventorDavid H. Malcolm
Life of this patent
Estimating the term…
Abstract
An electrostatic spray gun apparatus for coating systems having an entirely self-contained light weight electrical power supply adapted to convert the kinetic energy available in a moving air stream into the required high d.c. potential and which dispenses with external electrical supply connections thereto.
Claims30
Electrostatic spray coating apparatus devoid of external electrical power connection thereto comprising
- means for emitting a spray of atomized coating material,
- electrode means disposed adjacent the locus of atomization of said coating material for applying an electric charge to said atomized coating material, and
- a self-contained electrical potential originating power supply for providing the operating voltage for said electrode means, said self-contained electrical potential originating power supply including,
- means for converting the kinetic energy of a moving air stream derived from a remote source thereof into an alternating voltage, and
- long chain voltage multiplying means for converting said alternating voltage into a high direct current voltage for application to said electrode means.
Electrostatic spray coating apparatus devoid of external electrical power connection thereto comprising
- means for emitting a spray of atomized coating material,
- electrode means disposed adjacent the locus of atomization of said coating material for applying an electrical charge to said atomized coating material,
- a self-contained electrical potential originating power supply for providing the operating voltage for said electrode means, said self-contained electrical potential originating power supply including,
- means for converting the kinetic energy of a moving stream of air derived from a remote source thereof into an alternating voltage of low magnitude,
- means for converting said low magnitude alternating voltage into a substantially constant magnitude direct current voltage,
- oscillator means responsive to said substantially constant magnitude direct current voltage for providing a high frequency, high magnitude, alternating voltage output, and
- long chain voltage multiplying means for converting the high frequency, high magnitude output of said oscillator means into a direct current voltage of higher magnitude for application to said electrode means.
Electrostatic spray coating apparatus devoid of external electrical power connection thereto comprising
- means for emitting a spray of atomized coating material,
- electrode means disposed adjacent the locus of atomization of said coating material for applying an electrical charge to said atomized coating material,
- a self-contained electrical potential originating power supply for providing the operating voltage for said electrode means, said self-contained potential originating electrical power supply including,
- air driven turbine-generator means for converting the kinetic energy of a moving stream of air into a low frequency, low magnitude alternating voltage,
- means for converting said low frequency, low magnitude alternating voltage into a substantially constant direct current voltage of low magnitude,
- an oscillator responsive to said direct current low magnitude voltage for providing a high frequency alternating voltage output,
- step-up transformer means associated with said oscillator for delivering a high magnitude alternating voltage at the output frequency of said oscillator, and
- long chain voltage multiplying means for converting the output of said transformer means into a direct current voltage of still higher magnitude for application to said electrode means.
In an electrostatic spray coating apparatus incorporating means for emitting a spray of coating material and electrode means for applying an electric charge to the emitted coating material, a self-contained electrical potential originating power supply devoid of external electrical power connection thereto for providing the operating voltage for said electrode means comprising
- means for converting the kinetic energy of a moving gas stream derived from a remote source thereof into kinetic energy of a rotating solid, and
- means for converting the kinetic energy of said rotating solid into electrical energy for application to said electrode means.
In an electrostatic spray coating gun adapted to be connected to a source of fluid under pressure and to emit a spray of coating material including electrode means for applying an electric charge to the emitted coating material,
- a self-contained electrical power supply for providing the sole source of electrical potential to said electrode means,
- said self-contained electrical power supply comprising
- means for converting a portion of the energy of a fluid under pressure to an alternating voltage, and
- long chain voltage multiplying means for converting said alternating voltage into a high direct current potential, sufficient for use in electrostatic spraying, for application to said electrode means.
In a hand manipulable electrostatic spray coating gun adapted to be connected to a source of fluid under pressure and to emit a spray of coating material including electrode means for applying an electric charge to the emitted coating material,
- self-contained electrical power supply for providing the sole source of electrical power to said electrode means,
- said self-contained electrical power supply comprising
- a first monolithic subassembly for converting a portion of the energy of a fluid under pressure to an alternating voltage, and
- a second monolithic subassembly for converting said alternating voltage into a high direct current potential, sufficient for use in electrostatic spraying, for application to said electrode means,
- said first and second subassemblies each being removably insertable in said electrostatic spray coating gun.
Dependencies are inferred from the claim text.