Screw ring cone retention apparatus and method for rock bits

Details Screw ring cone retention apparatus and method for rock bits Screw ring cone retention apparatus and method for rock bits

1984-07-09

1985-09-03

Levy, Stuart S.

Bearings

Rotary bearing

Roller drill bit

29456, 76108A, 175369, 384903, 403326, F16C 4304, E21B 1008

Patent

active

045389284

ABSTRACT:
This invention teaches a means to retain a cutter cone onto a journal bearing of an earth boring rotary cone rock bit. Complementary and registering annular grooves are formed in the bearing surfaces of the journal and the cone. A tangential entry groove transitions from an end of the journal to the annular groove in the journal. Simultaneous 360.degree. rotation and axial movement of the cone over the journal, in combination with a ring distortion ramp block in the cone, threads an end of a split cone retention ring through the entry groove in the journal into the registering annular grooves, thereby retaining the cone on the journal.

REFERENCES:
patent: 3746405 (1973-07-01), Welton
patent: 4157122 (1979-06-01), Morris
patent: 4161343 (1979-07-01), Brashear
patent: 4236764 (1980-12-01), Galle
patent: 4317602 (1982-03-01), Orain
patent: 4344658 (1982-08-01), Ledgerwood, III
patent: 4444518 (1984-04-01), Schramm et al.

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