Patent · US Expired

Working tool with damped handle

US7527107B2 · kind B2 · utility

6Cited by

9References

7Claims

0Family size

Assignee

Wacker Construction Equipment AG · DE

Inventors

Rudolf Berger · Munich, DE
Wolfgang Schmid · Regensburg, DE
Otto W. Stenzel · Zöblitz, DE

Key dates

Filing date	Jul 13, 2004
Grant date	May 5, 2009
Priority date	—
Expiry date	Jul 23, 2024

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25D2250/221
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The invention relates to a hand-held working tool, having a first unit, powered by a vibration on operation and a second unit which may be displaced relative to the first unit. A vibration isolation device is arranged between the first and second unit, having an actuator, for generation of a control force. An operational force acting in the working direction (A) between the first and the second unit may be at least partly compensated by the control force. The actuator is pneumatically operated and comprises an air spring for vibration isolation. A working piston in an air spring percussion device on the working tool serves to supply compressed air for the air spring. Alternatively, the compressed air can be supplied by the oscillating relative movement between the first unit and the second unit.

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