Working tool for a percussion power tool

US6557653B2 · kind B2 · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventors

• Udo Hauptmann · Landsberg am Lech, DE
• Hanspeter Schad · Grabs, CH
• Martin Richter · Stuttgart, DE
• Franz Popp · Großburgwedel, DE
• Josef Fünfer · Königsbrunn, DE
• Konrad Artmann · Schondorf am Ammersee, DE
• Josef Bauer · Munich, DE

Key dates

• Filing date: Jul 11, 2001
• Grant date: May 6, 2003
• Expiry date: Jul 11, 2021

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B17/076
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A working tool for use with a percussion power tool and including a cushioning elongate stem (3), and a head (4) connected with the stem (3) for joint rotation therewith and for a limited axial displacement relative thereto, with the tool head (4) being adapted, with respect to its resistance associated with its cushioning properties, to characteristics of the percussion piston (5) of the power tool and with the tool stem (3) and the tool head (4) having mutually abutting each other end surfaces (10) which form at least a partially flat contact upon abutting each other.