Drill bits with cone retention means
Dual-diaphragm lubricant compensator for earth-boring bits
Earth bit having a pressure relief valve
Earth boring bit and lubricator compensation therefor
Earth boring bit and lubricator/compensator therefor
Earth boring bit packed lubrication system
Earth boring bit with pin mounted compensator
Earth boring bit with pressure compensating rigid face seal
Earth boring bit with protected seal means
Earth drilling knobby bit
Encapsulated elastomeric relief valve
Floating seal for drill bits
Friction bearing rock bit and segment
Grease filling arrangement in a cutter for a boring head
Grease pump for sealed bearing rotary cone rock bits
High speed rock bit
Hydrodynamic pump passages for rolling cone drill bit
Hydrostatic thrust face lubrication system
Indicating means for a rock bit lubricating system
Load responsive hydrodynamic bearing