Sub-assembly for lubricating rock drill bit

Details Sub-assembly for lubricating rock drill bit Sub-assembly for lubricating rock drill bit

1997-03-25

1999-07-27

Marmor, Charles A.

Lubrication

Lubricators

Force feed

184 614, 175228, 175229, F16H 730

Patent

active

059274395

ABSTRACT:
A lubricating sub-assembly for a rock drill, comprising a housing coupled into a drill string carrying a drill bit at its front end, a cavity disposed within the housing for holding a predetermined amount of a bearing lubricant, passages for communicating the interior of the cavity with one or more air circulation passages provided in the bit leading to bearings within the drill bit, and a valve mechanism for dispensing a preset amount of lubricant from the cavity to the communicating means passages.

REFERENCES:
patent: 3675729 (1972-07-01), Neilson
patent: 3942596 (1976-03-01), Millsapps, Jr.
patent: 4199856 (1980-04-01), Farrow et al.
patent: 4276946 (1981-07-01), Millsapps, Jr.
patent: 4399878 (1983-08-01), Karlsson et al.
patent: 4577705 (1986-03-01), Cross
patent: 4593775 (1986-06-01), Chaney et al.
patent: 4942930 (1990-07-01), Millsapps, Jr.
patent: 5099932 (1992-03-01), Hixon
patent: 5490571 (1996-02-01), Hanns et al.

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