US PATENT SUBCLASS 405 / 179
.~.~ With backfill or bedding material conveying or dispensing means

Current as of: June, 1999
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405 /   HD   HYDRAULIC AND EARTH ENGINEERING

154  DF  PIPE OR CABLE LAYING, RETRIEVING, OR UNDERWATER MANIPULATION {6}
174  DF  .~ By means advancing along terrain and guiding pipe or cable into subterranean position {6}
179.~.~ With backfill or bedding material conveying or dispensing means

DEFINITION

Classification: 405/179

With backfill or bedding material conveying or dispensing means:

(under subclass 174) Methods or apparatus wherein either (a) a bottom layer of material is placed in a trench prior to the placement of the string or conduit therein, or (b) a covering material is either dispensed from a supply hopper or conveyed from the point at which it was removed from the trench, and is deposited upon a string or conduit which has been positioned in the trench.

(1) Note. A mere crowder for replacing excavated earth from the side of the trench is not considered to be a conveyor or dispenser as required above.

SEE OR SEARCH CLASS

37, Excavating,

368+, for a ditching machine combined with a conveyor.