Patent · US Expired

Percussion rotary hand-held power tool with a rotatable guide tube

US6578644B2 · kind B2 · utility

3Cited by

5References

7Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Jens Frenzel · Fürstenfeldbruck, DE
Hans-Werner Bongers-Ambrosius · Munich, DE
Peter Gerold · Weilheim, DE

Key dates

Filing date	Dec 7, 2001
Grant date	Jun 17, 2003
Priority date	—
Expiry date	Dec 7, 2021

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25D2250/365
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A percussion rotary hand-held power tool including a percussion piston (3), an anvil (5), a chuck (4) for receiving a working tool, an axially displaceable and rotatable guide tube (6) located in the housing (2) and extending in a telescopic-like manner over the chuck (4) and the anvil (5) from a chuck region up to a region of the percussion piston (3), and a sealing element (8) located between the guide tube (6) and the housing (2) and having at least one axial seal (9) for performing only axial movement and at least one rotary shaft seal (10) for performing only rotary movement.

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