Mechanism for lubricating the bearings of the cutting rollers of

Details Mechanism for lubricating the bearings of the cutting rollers of Mechanism for lubricating the bearings of the cutting rollers of

1978-02-15

1979-06-19

Frankfort, Charles E.

Boring or penetrating the earth

With storage means for bit lubricant carried by bit or shaft

With fluid pressure-actuated feed means

175337, 308 82, E21B 918, F16C 1900

Patent

active

041583949

ABSTRACT:
A system for lubricating bearings in a drilling apparatus including a roller bit with at least one pivot and a cutting roller rotatably supported on the pivot by bearings. A cavity or chamber is formed in the roller bit for a non-compressible flushing liquid. The flow channel which communicates with the chamber at one end and the bearing cavity at the other end, provides a flow path for the flushing liquid to the bearing cavity. In one form the flushing liquid discharges to the bearing cavity at a point remote from an annular gap between the outer axial end face of the cutting roller and the roller bit. In another embodiment circumferentially spaced discharge ports are located between the bearings so that a portion of the flushing liquid is discharged to the environment and the remainder flows through the bearings and out the annular gap.

REFERENCES:
patent: 2831660 (1958-04-01), Smiecinski
patent: 2880970 (1959-04-01), Swart
patent: 3017937 (1962-01-01), Bobo
patent: 3235316 (1966-02-01), Whanger
patent: 3952815 (1976-04-01), Dysart

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