Cutlery
Patent
1980-10-09
1982-06-08
Stearns, Richard R.
Cutlery
175371, F16C 3310, F16C 3366, E21B 1022
Patent
active
043336914
ABSTRACT:
A rolling cone cutter earth boring bit is provided having a pair of radial facing thrust bearing surfaces bounding the pilot pin of the journal and the pilot pin cavity on the cone. The thrust bearing surface of the cone defines a plurality of slots open to, and angled forwardly from, the pin cavity, and terminating within the annular bearing area. The bearing surfaces are, upon assembly, lubricated with a "smear grease" which, under drilling operation works its way to the radially outermost area of the bearing surfaces leaving the bearing area adjacent the pilot pin generally depleted of lubricant. The slots, being closed on the outer end and having radially inwardly impelling force, scrape the outwardly migrated lubricant from the journal pin thrust surface and direct it back toward the pilot pin area for redeposition to replenish lubricant in the radially inner area of the bearing.
REFERENCES:
patent: 3235316 (1966-02-01), Whanger
patent: 3844363 (1974-10-01), Williams, Jr.
patent: 3845994 (1974-11-01), Trey
patent: 3950041 (1976-04-01), Miglierini
patent: 4098358 (1978-07-01), Klima
patent: 4109974 (1978-08-01), Svanstrom et al.
patent: 4181185 (1980-01-01), Keller et al.
patent: 4193463 (1980-03-01), Evans
patent: 4240674 (1980-12-01), Evans
Dresser Industries Inc.
Stearns Richard R.
Winans Fred A.
LandOfFree
Rotary rock bit with improved thrust flange does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary rock bit with improved thrust flange, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary rock bit with improved thrust flange will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-551074