Bearings – Rotary bearing – Roller drill bit
Patent
1981-08-31
1984-06-12
Levy, Stuart S.
Bearings
Rotary bearing
Roller drill bit
384 93, 175371, F16C 3376, E21B 1022, E21B 1024
Patent
active
044538367
ABSTRACT:
A sealed, internally lubricated rotary roller drill bit for drilling hard earth formations in which internally disposed axially, thrust and ball anti-friction bearings are used in combination and in which a first seal means is provided for preventing the introduction of drilling debris and a second seal means is provided to prevent the introduction of such debris and to maintain the lubricant inside of the bit under pressure. A pressure relief means is provided to allow excess lubricant to flow around one of the seals. A stream of air is directed through the bit, first in a direction to "clean" the bore hole and in further directions to allow ready access to a lubricant fitting and to effect a seal at the interface between rotating portions of the bit.
REFERENCES:
patent: 2126035 (1938-08-01), Reed
patent: 2126040 (1938-08-01), Reed
patent: 2177333 (1939-10-01), Reed
patent: 2664322 (1953-12-01), Boice
patent: 2673128 (1954-03-01), Reed
patent: 2690935 (1954-10-01), Alexander
patent: 2719026 (1955-09-01), Boice
patent: 3193028 (1965-07-01), Radzimovsky
patent: 3251634 (1966-05-01), Dareing
patent: 3344870 (1967-10-01), Morris
patent: 3461983 (1969-08-01), Hudson et al.
patent: 3572452 (1971-03-01), Winberg
patent: 3628616 (1971-12-01), Neilson
patent: 3866695 (1975-02-01), Jackson
patent: 3921735 (1975-11-01), Dysart
patent: 3952815 (1976-04-01), Dysart
patent: 4013325 (1977-03-01), Rear
patent: 4102419 (1978-07-01), Klima
patent: 4140189 (1979-02-01), Garner
patent: 4183417 (1980-01-01), Levefelt
patent: 4284310 (1981-08-01), Olschewski et al.
Hannon Thomas R.
Levy Stuart S.
LandOfFree
Sealed hard-rock drill bit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sealed hard-rock drill bit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sealed hard-rock drill bit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-119224