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US 2015/0308198 A1Published application
Drill bit including button array having different radii extending from center of head section
AssigneeKorea Institute of Industrial Technology
InventorsJung Woo CHO, Dae Young SHIN, Jin Seok YANG, Kyoung Il MOON, Ki Beom KWON, Chang Heon SONG, Joo Young OH
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Abstract
A drill bit including a button array having different radii extending from the center of a head section, and more particularly, to a drill bit in which buttons are arranged so as to have different radii from the center of a drill bit head section, thereby striking bedrock points having different radii and improving the efficiency of a drilling operation.
Claims3
A drill bit, comprising a plurality of buttons located on a drill surface and configured to perform a grinding operation;
- wherein the plurality of buttons comprises:
- peripheral buttons located in an outer portion of the drill surface;
- and
- a plurality of front buttons located in an inner portion of the drill surface, and configured to have different radii (r) from the central axis of the drill bit;
- and
- wherein the striking points that the plurality of front buttons strike while rotating have different radii.
3 more elements
Dependencies are inferred from the claim text.