Rotary drill bit ball plug

Details Rotary drill bit ball plug Rotary drill bit ball plug

1982-09-30

1984-05-01

Footland, Lenard A.

Bearings

Rotary bearing

Roller drill bit

175370, 308198, F16C 3330, F16C 3364, E21B 1022

Patent

active

044457910

ABSTRACT:
A removable ball loading hole plug for a rotary cutter rock drilling bit having an offset head portion to position the inner race end axially and rotationally. A locking groove on the outer surface of the offset head portion coacts with an adjacent end of a threaded retainer for removable locking engagement therewith.

REFERENCES:
patent: 1779587 (1930-10-01), Childs
patent: 2676790 (1954-04-01), Turner
patent: 3862762 (1975-01-01), Millsap
patent: 3989315 (1976-11-01), Murdoch
patent: 4014595 (1977-03-01), Dolezal
patent: 4183417 (1980-01-01), Levefelt
patent: 4211453 (1980-07-01), Johansson
patent: 4256193 (1981-03-01), Kunkel et al.

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