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US 11,278,971 B2Granted
Drill steel and its manufacture
AssigneeDaltron Forge (Pty) Ltd
InventorDale Robert Cox
Life of this patent
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Abstract
A drill steel includes a metal rod with an end to fit within a chuck of a drilling machine, and an integrally formed collar provided along the length of the metal rod. A ferrule is fastened on the metal rod adjacent the integrally formed collar on the side of the end of the metal rod. The ferrule forms a stop that prevents the drill steel from moving too far into the chuck.
Claims20
A drill steel comprising:
- a metal rod with a first end thereof configured to fit within a chuck of a drilling machine,
- an integrally formed collar provided along a length of the metal rod and
- a ferrule fastened on the metal rod adjacent the integrally formed collar on a side of the first end of the metal rod,
- wherein the ferrule forms a stop that prevents the drill steel from moving far into the chuck, and
- the metal rod of the drill steel has a bore extending axially centrally along the length thereof.
2 more elements
Dependencies are inferred from the claim text.