Cone locking system for a rotary rock bit

Details Cone locking system for a rotary rock bit Cone locking system for a rotary rock bit

1977-01-24

1978-07-04

Whitehead, Harold D.

Metal tools and implements, making

Blank or process

Drill

B21K 502

Patent

active

040981509

ABSTRACT:
The rolling cone cutter of a rotary rock bit is held in place on the bearing pin without the use of the conventional ball bearings. The bit includes a body with a bearing pin extending from the body. A rolling cutter is adapted to be rotatably mounted on the bearing pin. A locking means locks the cutter on the bearing pin. The locking means includes a groove in either the roller cutter or the bearing pin. A flange-type retaining element positioned on the opposite member, either the rolling cutter or bearing pin, projects into the groove and retains the rolling cutter on the bearing pin.

REFERENCES:
patent: 1909078 (1933-05-01), Scott
patent: 1909128 (1933-05-01), Scott et al.
patent: 2076002 (1937-04-01), Reed
patent: 3746405 (1973-07-01), Welton
patent: 4043411 (1977-08-01), Lichte

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