US PATENT SUBCLASS 137 / 437
.~.~.~.~ External hood or deflector or annular outlet surrounding the inlet pipe

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

386  DF  LIQUID LEVEL RESPONSIVE OR MAINTAINING SYSTEMS {11}
409  DF  .~ By float controlled valve {11}
434  DF  .~.~ Float arm operated valve {14}
436  DF  .~.~.~ With flow guide or restrictor {1}
437.~.~.~.~ External hood or deflector or annular outlet surrounding the inlet pipe

DEFINITION

Classification: 137/437

(under subclass 436) Apparatus in which the restrictor or flow guide is an external hood or deflector or annular outlet surrounding the inlet pipe.

SEE OR SEARCH THIS CLASS, SUBCLASS:

431, and 432, for floats surrounding the flow pipe and acting as spreaders or deflectors.