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Class 384/318 - Mist


Subclass of Class 384 - Bearings
Definition: Subject matter wherein the lubricant is suspended in a gaseous
No. of patents: 1
Last issue date: 01/31/1984


NumberTitleIssue Date
4428442Rock bit lubrication system
This invention relates to rotary rock drilling apparatus, particularly roller cone rock bits used with dry drilling of rock formations. Mining bits are typically air-driven, air-lubricated roller cone rock bits having open bearings, the air being driven t... 		01/31/1984
 
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