Patent ID: 7331110
Filing Date: 2008-02-19
Classification: A01G,B27B

Abstract:
1. Device for a pole saw for pruning trees or bushes comprising an elongated stiff tube ( 11 ) extending from a drive unit ( 10 ) to a remote chain saw head ( 12 ) and incorporating a drive shaft ( 14 ) connected to an input shaft ( 15 ) of a gear ( 16 ) arranged in the chain saw head ( 12 ) the gear being provided with an output shaft ( 18 ) on which a sprocket wheel ( 20 ) for driving a saw chain is arranged wherein the output shaft ( 18 ) is supported by a bearing ( 19 ) and the sprocket wheel ( 20 ) is provided with a hub part ( 22 ) surrounding the bearing ( 19 ); a mass body vibration damper ( 23 ) is secured to the hub part ( 22 ) and the vibration damper ( 23 ) is arranged between the gear ( 16 ) and the sprocket wheel ( 20 ) on an inner side of the sprocket wheel ( 20 ); and the vibration damper ( 23 ) is configured to rotate with the sprocket wheel ( 20 ) and provide additional weight for the saw head ( 12 ).