US PATENT SUBCLASS 137 / 440
.~.~.~ With U-shaped inlet pipe having terminal valve

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}
440.~.~.~ With U-shaped inlet pipe having terminal valve

DEFINITION

Classification: 137/440

(under subclass 434) Apparatus in which the inlet pipe is reversed upon itself in substantially a "U" shape and is provided with the float operated valve on the terminal thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

123+, for siphons.

215+, for back flow prevention in flow lines of inverted U shape which are not primarily intended to operate as siphons.

442+, for other inlet terminal float arm operated valves.

591, for tanks having internally extending flow pipes of inverted U shape.