Patent · US Expired

Antivibration element

US7270320B2 · kind B2 · utility

11Cited by

14References

18Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Johannes Menzel · Oberhausen, DE
Gunter Wolf · Eberdingen, DE
Helmut Lux · Winnenden, DE
Jens Kutzbach · Waiblingen, DE

Key dates

Filing date	Jul 30, 2003
Grant date	Sep 18, 2007
Priority date	—
Expiry date	Jul 30, 2023

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB27B17/0033
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

An antivibration element (1) is especially for a portable handheld work apparatus such as a motor-driven chain saw or a brushcutter. The antivibration element includes a coil spring (2) and at least one guide. An end section (7, 8) of the coil spring (2) is fixed to the guide. In order to provide a progressive characteristic line of the coil spring (2) in a simple way, the coil spring (2) has a transition section (11, 12), which borders at the end section (7, 8) and is guided with play on the guide. When the coil spring is under load, the turns of the transition section come at least in part into contact engagement with a helically-shaped slot in the guide so that the spring stiffness of the antivibration unit increases.

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