Nozzle retention method for rock bits
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United States of America Patent
Stats
-
Oct 4, 1983
Grant Date -
N/A
app pub date -
Mar 11, 1981
filing date -
Mar 11, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method to retain a nozzle in a rock bit is disclosed for use particularly with air-type roller cone rock bits. A plastic nozzle body is formed with a multiplicity of radially disposed fins equidistantly spaced on the periphery of the nozzle body. A nozzle retention hole is formed in the body of the rock bit with a diameter slightly less than the diameter of the fins on the plastic nozzle. As the plastic nozzle body is forced into the nozzle retention hole, the fins deflect slightly in a downstream direction and 'bite' against the nozzle retention walls formed by the bit body.
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