Boring or penetrating the earth – Bit or bit element – Impact or percussion type
Patent
1997-04-16
1999-07-27
Melius, Terry Lee
Boring or penetrating the earth
Bit or bit element
Impact or percussion type
175320, 175415, 279102, 285344, E21B 1036, E21B 1700, B23B 522, F16L 1700
Patent
active
059274115
ABSTRACT:
A rotatable cutting bit-chuck assembly wherein the cutting bit has an axially forward end an axially rearward end with at least one cutting insert at the axially forward end. The cutting bit contains a cavity defined by a cavity wall. The chuck has an axially forward end and an axially rearward end. Upon assembling the cutting bit on the chuck, the cavity of the cutting bit receives the axially forward end of the chuck wherein there is a variable resistance retention member between the chuck and the cavity wall.
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Hartmann Gary S.
Kennametal Inc.
Melius Terry Lee
Prizzi John J.
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