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Class Information
Number: 175/367
Name: Boring or penetrating the earth > Bit or bit element > Rolling cutter bit or rolling cutter bit element > Detachable stub axle, bushing or bearing
Description: Apparatus in which the rolling cutter element is journaled on an axle or pin supported at one end only in cantilever fashion, said axle or pin being either (1) readily detachable, or (2) provided with a bearing or bushing which is readily detachable therefrom.










Sub-classes under this class:

Class Number Class Name Patents
175/368 Releasable cutter securing device 11


Patents under this class:

Patent Number Title Of Patent Date Issued
8201646 Method and apparatus for a true geometry, durable rotating drill bit Jun. 19, 2012
7942217 Cutting apparatus for a microtunnelling system May. 17, 2011
7845437 Hole opener assembly and a cone arm forming a part thereof Dec. 7, 2010
7621346 Hydrostatic bearing Nov. 24, 2009
6742608 Rotary mine drilling bit for making blast holes Jun. 1, 2004
6568490 Method and apparatus for fabricating rotary cone drill bits May. 27, 2003
6474424 Rotary cone drill bit with improved bearing system Nov. 5, 2002
6131676 Small disc cutter, and drill bits, cutterheads, and tunnel boring machines employing such rolling disc cutters Oct. 17, 2000
6109375 Method and apparatus for fabricating rotary cone drill bits Aug. 29, 2000
6053264 Cutter head mounting for drill bit Apr. 25, 2000
5979574 Horizontal boring apparatus and method of using the same Nov. 9, 1999
5199516 Modular drill bit Apr. 6, 1993
5137097 Modular drill bit Aug. 11, 1992
5064007 Three disc drill bit Nov. 12, 1991
4903786 Earth boring bit with improved two piece bearing and seal assembly Feb. 27, 1990
4753303 Earth boring bit with two piece bearing and rigid face seal assembly Jun. 28, 1988
4154312 Drill bit with single cutting head May. 15, 1979











 
 
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