Earth boring bit with eccentric seal groove

Details Earth boring bit with eccentric seal groove Earth boring bit with eccentric seal groove

1979-09-24

1981-07-07

Footland, Lenard A.

Cutlery

308 361, F16C 3372

Patent

active

042771102

ABSTRACT:
A rolling cone cutter earth boring bit is provided with a sealing system that results in the seal being squeezed uniformly around the seal circumference during drilling. A seal groove is machined in the bearing pin. The seal groove is machined about an axis that is offset from the central axis of the bearing pin in the direction of the unloaded side of the bearing pin. When the bit is drilling and the bearing pin is loaded the seal will run on a diameter concentric with the diameter of the rolling cutter and will see uniform squeeze around its circumference.

REFERENCES:
patent: 3384426 (1968-05-01), Schumacher
patent: 3397928 (1968-08-01), Galle

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