Method of providing lubricant volume displacement system for a r

Details Method of providing lubricant volume displacement system for a r Method of providing lubricant volume displacement system for a r

1978-07-31

1980-04-29

Moon, Charlie T.

Metal working

Method of mechanical manufacture

Assembling or joining

29460, 141 1, 175228, 308187, 308 82, 184 614, B23P 1904

Patent

active

041998561

ABSTRACT:
A rotary rock bit is provided having a lubrication system with an expansion space within the lubricant reservoir to accommodate changes in lubricant volume. A flexible diaphragm is located within the lubricant reservoir. The lubricant reservoir is filled with lubricant thereby moving the flexible diaphragm to a substantially completely filled position. A predetermined volume of lubricant is displaced from the lubricant reservoir by forcing a fluid through passage means in the reservoir cap, moving the flexible diaphragm and displacing a predetermined volume of lubricant thereby providing an expansion space within the lubricant reservoir.

REFERENCES:
patent: 3007751 (1961-11-01), Eenink
patent: 3917028 (1975-11-01), Garner
patent: 4014595 (1977-03-01), Dalezal
patent: 4055225 (1977-10-01), Millsapps
patent: 4073548 (1978-02-01), Walters

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