Rock bit internal lubricant pump
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United States of America Patent
Stats
-
Nov 1, 1983
Grant Date -
N/A
app pub date -
Jan 23, 1981
filing date -
Jan 23, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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