Patent · US Active

Drill head for a drill and drill

US9695640B2 · kind B2 · utility

0Cited by

2References

46Claims

0Family size

Assignee

Irwin Industrial Tool Company · US

Inventors

Rainer Eggers · Taufkirchen, DE
Florian Probst · Freising, DE
Walter Hulm · Reichenkirchen, DE
Manfred Geier · Puchheim, DE

Key dates

Filing date	Aug 1, 2013
Grant date	Jul 4, 2017
Priority date	—
Expiry date	May 5, 2036

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B10/58
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A drill head is provided with three main cutting edges each having a straight direction of extension with a predominant radial direction component. The directions of extension limit two adjacent main bore dust discharge sectors, each spanning a main sector angle. Three drill head cutting legs each forming a main cutting edge where the three main cutting edges have different lengths along their directions of extension. Concentric ring shaped removal areas overlap at least partially such that a triple removal area coverage is provided in an outer ring zone and a double removal area coverage is provided in an inner ring zone.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.