Carbide tipped drill bit for boring holes in concrete and steel

Details Carbide tipped drill bit for boring holes in concrete and steel Carbide tipped drill bit for boring holes in concrete and steel

1977-10-04

1979-03-13

Spruill, Robert Louis

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175394, 175421, 408144, 408230, F21C 1301, B23B 5102

Patent

active

041437233

ABSTRACT:
A drill bit having a carbide tip brazed in the drill bit shank is disclosed for use in forming cylindrical holes in both concrete and steel by rotation about a central axis. The carbide tip has two side surfaces on opposite sides of said central axis. The top surfaces are connected by a substantially V-shaped notch which extends between the side surfaces and has its vertex off-center of the central axis to more effectively cut both concrete and steel.

REFERENCES:
patent: 2673714 (1954-03-01), Hargrave
patent: 3163246 (1964-12-01), Vagins et al.
patent: 3674101 (1972-07-01), Chromy

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