(under the class definition) Apparatus in which the tool, tool shaft or tool housing is provided with a means to retain and/or supply a friction reducing fluid or grease to the cutter or formation disintegrating member or a portion thereof (e.g., the bearings of a rolling cutter).
(1) Note. Drilling fluid is not considered to be a friction reducing fluid or grease under this definition. Patents in which the drilling fluid is used to lubricate the tool will be found below.
(2) Note. Structure including specific ducts, passages or a means separate from the drilling fluid passages, if disclosed for the purpose of supplying a friction reducing fluid which is distinct from the drilling fluid is included.
SEE OR SEARCH THIS CLASS, SUBCLASS:
337, for means to supply drilling fluid to the bearing of a rolling cutter bit.
SEE OR SEARCH CLASS 184, Lubrication, appropriate subclasses, for lubricating devices and systems.
384, Bearings,
93, for bearing structure with lubrication means which are adapted for use in roller type rock drill bits and only enough support structure for the bearing and lubrications means. A broadly recited roller cutter bit which may be part of the bearing support, but if the cutting means has any details of how it cutters shape of cutting teeth, etc. Class 175 is the proper place.
