Rock bit internal lubricant pump

Details Rock bit internal lubricant pump Rock bit internal lubricant pump

1981-01-23

1983-11-01

Novosad, Stephen J.

Boring or penetrating the earth

With storage means for bit lubricant carried by bit or shaft

Rotation of bit actuates lubricant feed means

175337, E21B 1022

Patent

active

044125909

ABSTRACT:
A rolling cutter rock drilling bit is disclosed which features an internal lubricant pump utilizing an internal elastomeric member moving across a grooved rigid surface to circulate lubricant in the bit bearings as a result of the shear forces on the lubricant created when the elastomer moves across the grooves.

REFERENCES:
patent: 3125175 (1964-03-01), Medlock et al.
patent: 4109974 (1978-08-01), Suanstrom et al.
patent: 4167219 (1979-09-01), McQueen
patent: 4167220 (1979-09-01), Ernst et al.
patent: 4181185 (1980-01-01), Keller et al.
patent: 4183416 (1980-01-01), Walters
patent: 4333691 (1982-06-01), Cooper

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