Starter device for an engine unit with improved damping

US7690277B2 · kind B2 · utility

Assignee

• DOLMAR GmbH · DE

Inventors

• Christian Kellermann · Nuremberg, DE
• Klemens Krahn · Norderstedt, DE

Key dates

• Filing date: May 5, 2008
• Grant date: Apr 6, 2010
• Expiry date: May 26, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/139
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A device for starting an internal combustion engine for hand-held tools, chainsaws, lawnmowers, trimmers and the like, includes a rotatable pulling medium roller which can be brought into functional connection with the crankshaft of the internal combustion engine in order to bring about a rotation of the crankshaft. The starting device has a simply configured functional connection between the crankshaft and the pulling medium roller and effectively reduces the force peaks reaching the pulling medium roller. To accomplish this, a deformation body having elastic deformation behaviour is arranged in the functional connection between the pulling medium roller and the crankshaft. The deformation body compensates for leading or lagging of the crankshaft with respect to the pulling medium roller.