Patent · US Expired

Electrical hand operated tool driving device with an electropneumatic striking mechanism

US6575254B2 · kind B2 · utility

15Cited by

3References

8Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Hans-Werner Bongers-Ambrosius · Munich, DE
Martin Richter · Stuttgart, DE
Konrad Artmann · Schondorf am Ammersee, DE

Key dates

Filing date	Jul 17, 2001
Grant date	Jun 10, 2003
Priority date	—
Expiry date	Jul 17, 2021

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25D2217/0061
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

An electrical hand operated tool driving device (1), such as a hammer drill, a combination hammer or a chipping hammer, has an electropneumatic striking mechanism (2), for which a cooling medium (8), for cooling the striking mechanism (2), flows through a liquid-tight cooling medium duct (10, 11, 12, 13), which is disposed in a housing (7) of the tool driving device (1).

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