US PATENT SUBCLASS 239 / 690
ELECTROSTATIC TYPE

Current as of: June, 1999
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239 /   HD   FLUID SPRINKLING, SPRAYING, AND DIFFUSING

690ELECTROSTATIC TYPE {11}
690.1  DF  .~> Induction charging
691  DF  .~> With automatic safety feature
692  DF  .~> With electrogasdynamic generator in spray device
693  DF  .~> Spray device recovers unused particles
694  DF  .~> With cyclical movable support
695  DF  .~> Plural spray devices
696  DF  .~> Having plural exit openings
697  DF  .~> Fixed member deflects exiting material {1}
699  DF  .~> With impeller (e.g., vibrator) {1}
704  DF  .~> With fluid entrainment {2}
708  DF  .~> Pressurized spray material

DEFINITION

Classification: 239/690

ELECTROSTATIC TYPE:

(under the class definition) Apparatus to project, scatter, sprinkle, or drip material from a supply system into the ambient air or atmosphere combined with a means to electrostatically charge the resulting distributed material in order to obtain a desired characteristic, e.g., dispersion, drop size, velocity, or direction.

(1) Note. Some characteristic structure of an electrostatic distribution must be claimed to warrant classification herein, for example, insulated electric conductors, electric connecting means, and nominal electric power supply means have been considered significant electrostatic distributor features for classification herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3, for methods of electrostatically distributing material.

SEE OR SEARCH CLASS

118, Coating Apparatus, pertinent subclasses, especially

620+, and see the Notes thereto for patents claiming an electrostatic spraying device and (a) a work conveyor or other specific or nominal work supporting device, (b) some relation of the spraying device to the positively recited work, e.g., the relative spacing or attitude between the work and the spraying device, or (c) a particular motion of the sprayer relative to the work determined exclusively by

characteristics of the work or by the law of the machine of which the sprayer forms a part. A nominal claiming of the work itself and/or electrostatic, spray charging electrode in space has been included in this class (239) provided there is no claimed relation between the work and either the electrode or the fluid spraying or projecting means. The following examples are considered work relations and indicate classification in Class 118 when the claim also includes positive recitation of the work (even though broadly or by name only): (a) electrical connections between the work and either the fluid sprayer or an electrostatic charge generator, or (b) a statement that the sprayer is spaced close to the work. See Class 118, Coating Apparatus, class definition for additional explanation of the line. 361, Electricity: Electrical Systems and Devices, appropriate subclasses, especially

226+, and see the Notes thereto for particle charging methods and apparatus involving: (a) electrostatic spraying with significant supply means limited to use only with powder or pulverulent material, (b) residual electrostatic dispersing of liquid into spray or fog (e.g., liquid removed from the supply system solely by electrostatic force). A claimed combination of a distributor means under the definition of Class 239 and means to electrostatically charge the fluid upstream, at, or downstream of the distributor is proper subject matter for Class 239.

427, Coating Processes,

458+, for coating processes in general wherein an electrostatic charge is utilized to perfect the coating operation.