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US 5,720,436 AGranted
Electrostatic spray device for coating material
AssigneeGema Volstatic AG
InventorKarl Buschor
Life of this patent
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AssigneeGema Volstatic AG
InventorKarl Buschor
Estimating the term…
Electrostatic spray device for coating powder or liquid with at least one charging electrode for electrostatic charging the coating material. The device has at least one, and preferably a plurality, of counter electrodes for the electrostatic removal of free charges (electrons or ions) from the stream of sprayed coating material adjacent a coating material discharge nozzle on the device. The counter electrodes are carrier by a ring which is slipped onto a body of the device. A sleeve screwed onto the body holds the ring in an axial direction on the body. An electrical line for discharging the free charges from the counter electrodes is secured to the ring. The electrical line passes through and is confined in a bore in the body to prevent rotation and axial movement of the ring on the body. When the sleeve is removed from the body, the counter electrode ring and attached electrical line can be withdrawn from the body in the axial direction as a unit.
In an electrostatic spray device for coating material which includes a body and a coating material duct in said body connected to a nozzle mounted on a forward end of said body, said nozzle being adapted to discharge coating material, a charging electrode for imparting an electrostatic charge to coating material discharged from said nozzle, at least one counter electrode arranged outside of the coating material stream at a distance to the rear of the charging electrode, and a conductor extending through a passage in said body and adapted to connect said counter electrode to an electrical counter potential whereby said counter electrode and said conductor are adapted for removing free electrical charges from sprayed coating material, the improvement comprising a ring mounting said counter electrode, said ring having a passage adapted to pass said forward end of said body, wherein said conductor has a first end secured to said counter electrode on said ring and a free second end, wherein said conductor passes through said passage when said ring is placed on said forward body end and is removed from said passage when said ring is removed from said forward body end, and means for releasably retaining said ring on said forward body end.
Dependencies are inferred from the claim text.