Rock bit with improved thrust face
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 31, 1999
Grant Date -
N/A
app pub date -
Jun 19, 1997
filing date -
Jun 19, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A rotary cone drill bit includes a drill bit body having two or more support spindles extending inward and downward toward a vertical axis of the drill bit body. Each support spindle of the drill bit includes a base pin and further includes a pilot pin extending from the base pin along a longitudinal axis of the support spindle. A conical-shaped thrust face forms the transition from the base pin to the pilot pin. A cutting cone is rotatably mounted on each support spindle and includes a conical internal surface to run in contact with the conical thrust face of the support spindle. Rotation of the cutting cone carries lubricant from the non-load side of the spindle to the contact surfaces on the load side of the spindle.
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