Earth boring drill bit with snap ring cutter retention

Details Earth boring drill bit with snap ring cutter retention Earth boring drill bit with snap ring cutter retention

1981-11-27

1985-01-01

Footland, Lenard A.

Bearings

Rotary bearing

Roller drill bit

384 96, F16C 1710, F16C 4302

Patent

active

044914288

ABSTRACT:
Disclosed herein is an earth boring bit of otherwise conventional construction except for the bearing and cutter retention. A snap ring is used to retain the cutter, the grooves that receive the ring and the ring construction being such that the ring is forced into the retainer groove when the cone is thrust inward. The ring cannot therefor accidentally return to its assembly position to permit cutter loss. This enables the use of exclusively frictional bearings and retainer means of exceptional strength and reliability.

REFERENCES:
patent: 3620580 (1971-11-01), Cunningham
patent: 3935911 (1976-02-01), McQueen
patent: 4344658 (1982-08-01), Ledgerwood

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