Patent · US Active

Drilling machine, in particular hand-held core drilling machine

US9216459B2 · kind B2 · utility

2Cited by

8References

17Claims

0Family size

Assignee

C. & E. FEIN GMBH · DE

Inventors

Boris Richt · Hemmingen, DE
Armin Eisenhardt · Bisingen, DE

Key dates

Filing date	Apr 27, 2012
Grant date	Dec 22, 2015
Priority date	—
Expiry date	Apr 4, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/65
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The invention discloses a drilling machine, in particular a hand-held core drilling machine, having a drive with a motor that can be coupled to a tool spindle in order to drive the latter, wherein the drive allows at least a first transmission stage and a second transmission stage, having a center mount for mounting a pilot drill and having a tool mount for mounting a drill bit, wherein the drill bit and the pilot drill can be mounted substantially concentrically with one another, wherein the pilot drill, in particular in order to drill a pilot hole, can be driven in a first rotational speed range by means of the first transmission stage and wherein the drill bit, in particular in order to drill a core hole, can be driven in a second rotational speed range by means of the second transmission stage.

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