Patent · US Expired

Drilling device having a radially displacable drill shank

US5540527A · kind A · utility

12Cited by

4References

10Claims

0Family size

Assignee

fischerwerke Artur Fischer GmbH & Co. KG · DE

Inventors

Hartmut Bohnet · Pfalzgrafenweiler, DE
Stefan Lind · Pfalzgrafenweiler, DE
Willi Haug · Dornstetten, DE

Key dates

Filing date	Dec 5, 1994
Grant date	Jul 30, 1996
Priority date	—
Expiry date	Dec 5, 2014

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/93
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The drilling device has a radially resilient shaft (3) which allows radial displacement of the drill bit (4) and the drill head (5). The radial displacement can be caused by a vibration device (8), but a self-excited oscillation of the resilient shaft (3) can also provide the desired radial displacement of the drill bit and the drill head. The drill shank (2) has a sleeve-shaped shank extension (17) provided with a damping chamber (18) filled with a damping agent (19) and the resilient shaft (3) is in the damping chamber (18) which is sealed by a radially resilient seal (21) surrounding the resilient shaft (3).

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