Rock bit with bearing lubricant reservoir

Details Rock bit with bearing lubricant reservoir Rock bit with bearing lubricant reservoir

1981-07-27

1984-05-15

Leppink, James A.

Boring or penetrating the earth

With storage means for bit lubricant carried by bit or shaft

With fluid pressure-actuated feed means

175372, 308187, E21B 1022

Patent

active

044482680

ABSTRACT:
A rotary rock bit having the load bearing elements between the axle and the cone cutter encased in a permeable porous plastic material having lubricant in the pores thereof, with the material substantially filling a portion of the bearing cavity to seal the cavity and a lubricant reservoir in the bit with a lubricant flow passage therefrom to adjacent said material to replenish the lubricant lost from the pores during use.

REFERENCES:
patent: 3027626 (1962-04-01), Murphy
patent: 3096129 (1963-07-01), Hay
patent: 3630584 (1971-12-01), McKee
patent: 3784264 (1974-01-01), Jackson
patent: 4103759 (1978-08-01), Erich et al.
patent: 4207658 (1980-06-01), Sorenson
patent: 4284151 (1981-08-01), Levefelt
patent: 4286829 (1981-09-01), Heemskerk
Jamison, Warren E., "Applications of Microporous Polymer Lubricants", Lubrication Engineering, Dec. 1982, pp. 758-761.

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