US PATENT SUBCLASS 37 / 320
.~.~ With pumping chamber

Current as of: June, 1999
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37 /   HD   EXCAVATING

307  DF  BENEATH A BODY OF WATER (E.G., DREDGER) {11}
317  DF  .~ Suction {8}
320.~.~ With pumping chamber

DEFINITION

Classification: 37/320

With pumping chamber:

(under subclass 317) Apparatus including an enclosure intermediate to the suction inlet and outlet adapted for controlling the flow of the motive fluid and dredged material. [figure] [caption]A - Suction inlet pipes; B - Discharge end; C - Pumping chambers; D - Digging tool or cutter

(1) Note. The dredged material is initially drawn into the enclosure by suction and is subsequently forced out of the enclosure for disposal.

SEE OR SEARCH CLASS

417, Pumps,

118+, for the pumping of liquid by supplying or exhausting the gaseous motive fluid to or from the pumping chamber.