Pull-rope starter for an internal combustion engine

US5267540A · kind A · utility

Assignee

• Andreas Stihl · DE

Inventors

• Gerhard Zerrer · Bad Marienberg, DE
• Igor Klaric · Bad Marienberg, DE

Key dates

• Filing date: Sep 11, 1992
• Grant date: Dec 7, 1993
• Expiry date: Sep 11, 2012

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02N3/02
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention is directed to a pull-rope starter for an internal combustion engine of a portable handheld work apparatus such as a motor-driven chain saw, cutoff machine or the like. The work apparatus has a housing defining cooling air openings for conducting cooling air and the pull-rope starter includes a rope disc rotatably journalled in the housing in the region of the cooling air openings. A carrier is disposed adjacent the rope disc and seated in the housing so as to close a space in the housing for accommodating a spiral spring mounted on the carrier. The carrier is so configured that its outer periphery is greater than the rope disc. The carrier has a wall section on its side facing toward the rope disc and this wall section extends essentially over the width of the rope slot and over essentially the entire periphery of the rope disc. The rope slot and the pull rope accommodated therein are in this way covered with respect to the cooling-air flow so that dirt particles and abrasive dust entrained in the cooling-air flow cannot settle in the rope slot. The mechanical stress on the pull rope is reduced and the resistance to wear of the pull-rope starter is increased.