US PATENT SUBCLASS 299 / 87.1
.~ Tooth mounted on helical head portion or head with helical conveying portion

Current as of: June, 1999
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299 /   HD   MINING OR IN SITU DISINTEGRATION OF HARD MATERIAL

79.1  DF  CUTTER TOOTH OR TOOTH HEAD {17}
87.1.~ Tooth mounted on helical head portion or head with helical conveying portion

DEFINITION

Classification: 299/87.1

Tooth mounted on helical head portion or head with helical conveying portion:

(under subclass 79.1) Cutter tooth or tooth head in which the element is fastened to a spiral-shaped supporting means or the supporting means has a spiral shape member used to move material.

(1) Note. The helix does not necessarily have to be continuous in extent through 360 degrees for classification herein, but may comprise a series of teeth describing, in overall extent, a broken convolution of 360 degrees.

SEE OR SEARCH CLASS

175, Boring or Penetrating the Earth,

394+, for an earth boring or penetrating bit having a helical conveying portion.