US PATENT SUBCLASS 37 / 307
BENEATH A BODY OF WATER (E.G., DREDGER)

Current as of: June, 1999
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37 /   HD   EXCAVATING

307BENEATH A BODY OF WATER (E.G., DREDGER) {11}
308  DF  .~> With signal, scale, indicator, or inspection means
309  DF  .~> With means to control dredger operation (e.g., movement of dredged material) in response to sensed condition {3}
313  DF  .~> By use of submarine or undersea vessel
314  DF  .~> Adapted to excavate specific discrete material {1}
317  DF  .~> Suction {8}
337  DF  .~> Rotary digger (e.g., bucket wheel)
338  DF  .~> Endless {1}
340  DF  .~> Grab
341  DF  .~> Scoop or bucket
342  DF  .~> With means to scour or scrape (e.g., propeller means, digging teeth, plow) {2}
345  DF  .~> With vessel, propulsion, or anchor structure (e.g., bank spud, spud brace) {1}

DEFINITION

Classification: 37/307

BENEATH A BODY OF WATER (E.G., DREDGER):

(under the class definition) Apparatus especially adapted to excavate material under a mass of liquid such as a sea, lake, river, or stream. [figure] [caption]A - Cutter; B - Ladder; C - Suction pipe; D - Hull; E - Pontoon; F - Spud; G - Cutter motor; H - Pump; J - Pump motor; K - Dredged bottom

(1) Note. Class 37 includes a dredger which selectively picks up material (e.g., by a screen in the intake of a suction nozzle). But a dredger means to pick up material and subsequently separate the components thereof is classified elsewhere. See Search Notes below.

SEE OR SEARCH CLASS

56, Harvesters,

8+, for a device used for underwater cutting or removing marine plant growth.

175, Boring or Penetrating the Earth,

5+, for boring a submerged formation.

299, Mining or In Situ Disintegration of Hard Material, 7+, for excavating under water combined with separating materials under water. See (1) Note above.

405, Hydraulic and Earth Engineering, appropriate subclasses, for control or treatment of water in open channels or other bodies of water, especially

136+, and 158+ for a step or means for placing a tunnel,

string, or conduit beneath a body of water.