US PATENT SUBCLASS 239 / 488
.~.~.~ Having a solid core

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

461  DF  FLOW DEFLECTING OR ROTATION CONTROLLING MEANS {9}
463  DF  .~ Fluid rotation inducing means upstream of outlet {12}
487  DF  .~.~ Axially extending spiral-type flow passage or diverter {2}
488.~.~.~ Having a solid core

DEFINITION

Classification: 239/488

(under subclass 487) Apparatus having a member of substantially axial length and of central imperforate form located in the flow passage upstream of the egress port.

SEE OR SEARCH THIS CLASS, SUBCLASS:

494+, for helical passages in disc-like or relatively thin, flat members.