Rock bit cone retention

Details Rock bit cone retention Rock bit cone retention

1983-11-21

1985-03-26

Levy, Stuart S.

Bearings

Rotary bearing

Roller drill bit

175369, F16C 4302, E21B 1022

Patent

active

045069972

ABSTRACT:
A rock bit cone retention means is disclosed which primarily utilizes a series of segmented rings. The segmented rings are inserted into a relatively deep annular channel formed transverse to the axis of either a journal or a cone of a rock bit leg assembly. The complementary channel, shallow in depth, is formed in either the journal or the cone. The cone, when properly positioned on the journal, closes out the channel formed in both the cone and the journal. Upon assembly, the segments are urged within the deep groove or channel in the journal or the cone such that each of the segments do not protrude beyond the bearing surface as the cone is passed over an end of the journal. Means are provided adjacent the cone retention segment to accept a spring biasing means to urge each segment away from the bottom of the deep groove in the journal or cone. When the cone is placed over the journal, each of the segments, when they register with the complementary groove in the journal, snap into place, thus substantially locking the cone on the journal.

REFERENCES:
patent: 1634318 (1927-07-01), Bull
patent: 1835523 (1931-12-01), Reed
patent: 1839589 (1932-01-01), Reed
patent: 1865706 (1932-07-01), Reed
patent: 2664321 (1953-12-01), Noble

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