US PATENT SUBCLASS 175 / 323
.~ Helix or helically arranged structure

Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

320  DF  WITH TOOL SHAFT DETAIL {4}
323.~ Helix or helically arranged structure

DEFINITION

Classification: 175/323

(under subclass 320) Apparatus including structure other than the structure of a bit providing a helix or portions arranged in a helical manner.

(1) Note. The helix or helically arranged portions usually perform a pumping or conveying function.

SEE OR SEARCH THIS CLASS, SUBCLASS:

102, for a helix or helically arranged structure in a device which includes a below ground tool drive motor.

310, for a receptacle with a helical conveyor.

388, for a bit having a pilot which is helical.

394+, for a bit with a helical conveying portion. SEE OR SEARCH CLASS

15, Brushing, Scrubbing, and General Cleaning,

104.33, for helically shaped sewer cleaners.