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Class Information
Number: 175/307
Name: Boring or penetrating the earth > With cutting edge cover
Description: Apparatus including a means provided to fit over and protect a cutting edge of a bit or cutter element from being damaged or inflicting damage only while the bit or cutter element is not in use, such means being necessarily removed or destroyed either before or simultaneously with the commencement of boring.

Patents under this class:

Patent Number Title Of Patent Date Issued
8517123 Milling cap for a polycrystalline diamond compact cutter Aug. 27, 2013
7228921 Ice auger covering apparatus Jun. 12, 2007
7201237 Stabilizing system and methods for a drill bit Apr. 10, 2007
5740872 Hardfacing material for rolling cutter drill bits Apr. 21, 1998
5279374 Downhole drill bit cone with uninterrupted refractory coating Jan. 18, 1994
4889194 Method and a device for deep hole drilling Dec. 26, 1989
4397361 Abradable cutter protection Aug. 9, 1983
3934659 Apparatus for drilling holes in earth surface Jan. 27, 1976

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