Patent · US Expired

Tool holder device

US4491444A · kind A · utility

46Cited by

8References

14Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Gerhard Rumpp · Herrsching am Ammersee, DE
Manfred Spieth · Martinsried, DE
Dieter Scholz · Germering, DE

Key dates

Filing date	Jun 25, 1982
Grant date	Jan 1, 1985
Priority date	—
Expiry date	Jun 25, 2002

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T409/30952
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A tool holder for a drill capable of performing only rotary drilling or the combination of rotary and percussive drilling includes a tubular retainer member in which the shank of a tool can be inserted. Locking members mounted in the retainer member fit into recesses in the tool shank for holding it in the retainer member. During percussive drilling the locking members are axially displaceable in the recesses and the tool experiences a certain amount of axial play, however, when only rotary drilling is performed the locking members are held against axial displacement by stops so that the tool does not have any axial play. One stop forms a part of the retainer member and another stop is part of a member slidably displaceable relative to the retainer member.

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