US PATENT SUBCLASS 239 / 257
.~.~.~ Variable outlet aperture size

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

225.1  DF  DISTRIBUTOR CONTINUOUSLY MOVES RELATIVE TO SUPPORT DURING SPRAYING {16}
251  DF  .~ Reaction-type nozzle motive means {8}
256  DF  .~.~ Control of speed or axis of rotation shiftable (manual valves excluded) {2}
257.~.~.~ Variable outlet aperture size

DEFINITION

Classification: 239/257

(under subclass 256) Apparatus including a member carrying an outlet aperture, and means to adjust the area of the aperture to change the velocity of the distributor or the shape of the area sprayed.