Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore
Reexamination Certificate
2006-04-18
2006-04-18
Gay, Jennifer H. (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Bit with leading portion forming smaller diameter initial bore
C175S334000, C175S395000, C175S403000, C299S041100, C408S202000, C408S24100G, C404S075000, C404S090000
Reexamination Certificate
active
07028790
ABSTRACT:
A drill bit includes a body defining an axis and first and second cylindrical portions, a coupling adapted for connection with a rotary driver, and a depth stop adjustably secured to a first portion by a plurality of adjusting fasteners in a manner to limit penetration of the bit into a target surface. A method of drilling a hole into the surface includes locating a drilling machine fitted with a drill bit over a target location, compensating for wear on the bit by setting a depth stop to limit travel of the bit at the predetermined depth, drilling at the target location until the depth stop contacts a surface, where the primary cutting surface forms a portion of the hole defined by a first diameter and the secondary cutting surface forms a portion of the hole defined by a second diameter in a single step, and removing the drill bit from the hole.
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Coy Nicole A
Fish & Richardson P.C.
Gay Jennifer H.
Jack Moore Associates, Inc.
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