Patent ID: 6021965
Filing Date: 2000-02-08
Classification: B05B,F16L

Abstract:
An apparatus for use in applying electrostatically charged coating material to a workpiece, said apparatus comprising a spray gun, a source of electrostatically charged coating material, and a conduit which is connected with said spray gun and with said source of electrostatically charged coating material, said conduit including a first layer of a polymeric material, a second layer of elastomeric material disposed around said first layer, said second layer of elastomeric material being electrically insulating, a third layer of elastomeric material containing an electrically conductive material and disposed around said second layer, said third layer of elastomeric material and conductive material being electrically conductive, and a fourth layer of polymeric material extending around said third layer of elastomeric material, wherein said spray gun includes a handle portion, an extension portion connected to and extending outward from said handle portion, and a nozzle connected with said extension portion to direct a flow of electrostatically charged coating material toward a workpiece, said conduit having an end portion which extends into said extension portion of said spray gun, said end portion of said conduit including said first layer of a polymeric material and said second layer of elastomeric material which is electrically insulating, said third layer of elastomeric material containing an electrically conductive material having terminated prior to said end portion of said conduit and being spaced from said extension portion of said spray gun.