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Class Information
Number: 175/380
Name: Boring or penetrating the earth > Bit or bit element > Unsupported abrading particle type (e.g., shot)
Description: Apparatus in which the bit is particularly adapted to receive and restrain unsupported abrasive particles between its outer end and the bore bottom, said particles forming the cutting edge of the bit.

Patents under this class:

Patent Number Title Of Patent Date Issued
8342265 Shot blocking using drilling mud Jan. 1, 2013
8113300 Impact excavation system and method using a drill bit with junk slots Feb. 14, 2012
8087480 Device and method for feeding particles into a stream Jan. 3, 2012
6454028 Wear resistant drill bit Sep. 24, 2002
4042048 Drilling technique Aug. 16, 1977

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