Rotary rock bit ball plug

Details Rotary rock bit ball plug Rotary rock bit ball plug

1985-05-13

1986-07-08

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175228, E21B 1024

Patent

active

045987785

ABSTRACT:
A rock bit having a cutter retained on an axle through an array of rolling members interposed within an interior annular space therebetween, and a passage defining a passage wall for inserting the rolling members from the exterior of the bit to the interior space. A plug for closing the passage, and retaining the members in the space is welded at an end adjacent the bit exterior and a contamination excluding snap ring is interposed between the plug and the passage wall for preventing weld slag or weld material from entering the passage.

REFERENCES:
patent: 3990525 (1976-11-01), Penny
patent: 4179003 (1979-12-01), Cooper
patent: 4183417 (1980-01-01), Levefelt
patent: 4445791 (1984-05-01), Klima

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