Patent · US Expired

Drilling device

US5062743A · kind A · utility

31Cited by

5References

25Claims

0Family size

Assignee

C. & E. FEIN GMBH · DE

Inventors

Dietrich Wieland · Wendelstein, DE
Martin Kalb · Wendelstein, DE
Werner Grupp · Leinfelden, DE
Michael Nothofer · Stuttgart, DE

Key dates

Filing date	Jul 10, 1990
Grant date	Nov 5, 1991
Priority date	—
Expiry date	Jul 10, 2010

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/6779
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

In a drilling device, a holder is provided that is displaceable with respect to a foot in a feed direction. A drilling machine tool is carried by the holder. An electromotor provides a feed drive for driving the holder in the feed direction. The drilling machine tool and/or the holder are displaceable relative to the feed drive in an opposite direction to the feed direction by overcoming a counterforce. A switching element monitors the relative displacement and enables a signal to be derived for stopping the feed drive if a predetermined value of counterforce is exceeded. Motor current is limited to a predetermined maximum value during operation of the device.

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