Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – Rotation of bit actuates lubricant feed means
Patent
1990-12-21
1992-03-31
Dang, Hoang C.
Boring or penetrating the earth
With storage means for bit lubricant carried by bit or shaft
Rotation of bit actuates lubricant feed means
175371, 184 31, 384 93, E21B 1024
Patent
active
050999320
ABSTRACT:
The present invention provides a lubricant circulation system for a rock drill bit which circulates a flow of lubricant over the bit bearing surfaces to keep the bearings optimally lubricated and free to particulate contaminants from the drilling process. A lubricant pumping assembly, including a pair of nested gerotor pump elements is attached to either the drill bit cutting element or support structures so that one of the gerotors is driven by rotation of the bit cutting element or related structures and the other gerotor rotates freely. The gerotors have a corresponding tooth and recess configuration that pulls lubricant from the lubricant supply under positive pressure into a variable sized cavity formed as the gerotors rotate relative to each other and then forces lubricant to the bearing surfaces. Lubricant may optionally be pumped back to the lubricant supply with continued rotation of the gerotors or out of the journal area with the drilling cuttings for return to the surface.
REFERENCES:
patent: 1456461 (1923-05-01), Page
patent: 1909128 (1933-05-01), Scott et al.
patent: 3244459 (1966-04-01), Ortloff
patent: 3407741 (1968-10-01), Weber et al.
patent: 4167219 (1979-09-01), McQueen
patent: 4167220 (1979-09-01), Ernst et al.
patent: 4181185 (1980-01-01), Keller et al.
patent: 4240674 (1980-12-01), Evans
patent: 4412590 (1983-11-01), Daly
patent: 4446933 (1984-06-01), Bodine
patent: 4501338 (1985-02-01), Underwood
Cummins Engine Company, Inc.
Dang Hoang C.
LandOfFree
Rock drill bit lubricant circulating system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rock drill bit lubricant circulating system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rock drill bit lubricant circulating system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2252618