Manually operated implement

US7152853B2 · kind B2 · utility

Assignee

• Andreas Stihl AG & Co. KG · DE

Inventors

• Johannes Menzel · Oberhausen, DE
• Helmut Lux · Winnenden, DE
• Marc Schmid · Oppenweiler, DE
• Gunter Wolf · Eberdingen, DE

Key dates

• Filing date: Jun 4, 2004
• Grant date: Dec 26, 2006
• Expiry date: Jun 4, 2024

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F13/002
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A manually operated implement such as a chain saw, a parting-off grinder or similar device has an internal combustion engine to drive a tool and a handle arrangement to operate the implement. The handle arrangement is connected to the internal combustion engine via a vibration damping system, the vibration damping system comprising at least one anti-vibration element. In order to achieve good vibration damping and sufficient operational rigidity in all operating ranges, in at least one direction of vibration in a predetermined frequency range the anti-vibration element has a first characteristic curve in a first state and a second characteristic curve in a second state and the anti-vibration element can be switched between the first state and the second state.