Pruning apparatus

US4696108A · kind A · utility

Assignee

• Andreas Stihl · DE

Inventors

• Gerhard Zerrer · Bad Marienberg, DE
• Gunter Mayer · Untereisesheim, DE

Key dates

• Filing date: Jun 11, 1985
• Grant date: Sep 29, 1987
• Expiry date: Jun 11, 2005

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01D75/20
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention is directed to a pruning apparatus having a drive motor which is mounted on a carrier adapted for mounting on the back of an operator. The drive motor is connected with a rotating cutting tool by means of a flexible shaft. The flexible shaft includes an output member and a drive member. The output member is connected to a drive motor and is contained in a connecting tube. The output member is connected via a coupling unit to the drive member which is disposed in a guide tube. The guide tube carries the rotating cutting tool which produces a smooth cut so that the formation of fungus at the cut is completely eliminated. A cover plate is affixed to the guide tube so as to be adjacent to the cutting tool and has an outer diameter smaller than the cutting circle defined by the tip of the rotating cutting tool. While operating the apparatus, the stationary cover plate, unlike the rotating cutting tool, remains clearly visible thereby facilitating a precise cutting operation.