Threaded ring retention mechanism

Details Threaded ring retention mechanism Threaded ring retention mechanism

1993-08-24

1995-01-24

Neuder, William P.

Boring or penetrating the earth

Processes

175371, 295251, 29456, 4119372, E21B 1008

Patent

active

053835255

ABSTRACT:
A method of manufacturing a rolling cutter drill bit of the kind where each cutter is rotatably mounted on a bearing spindle on the bit body and is retained on the spindle by a threaded retention ring in screw-threaded engagement with the cutter. The retention ring is provided with an aperture to expose a portion of the screw-thread on the cutter and an implement is passed along a registering passage in the spindle and through the aperture in the retaining ring to deform or otherwise alter the exposed screw-thread in a manner to prevent subsequent relative rotation between the screw-threads, thereby locking the retention ring to the cutter. Instead of deforming the screw-thread it may be formed with a recess which is engaged by a pinning element secured in the aperture in the retaining ring.

REFERENCES:
patent: 5011352 (1991-04-01), Hatter
patent: 5145300 (1992-09-01), Wallace

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