Drill bit and method of manufacture
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 29, 1983
Grant Date -
N/A
app pub date -
May 13, 1981
filing date -
May 13, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of making a rolling cutter drill bit involving the steps of forming a body member having an upper portion adapted to be threaded and passaging therein, forming at least one arcuate recess in the lower end of the body member, providing a lug assembly comprising a lug member having a bearing journal carrying a rolling cutter and an arcuate surface adapted to be received in the recess, and securing the lug assembly in the recess with the arcuate surface of the lug member in engagement with the arcuate recess. A drill bit made according to the foregoing method is also disclosed.
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