Back to results
US 9,186,737 B2Granted
Chainsaw with a sharpening element
AssigneeHusqvarna AB
InventorsPär Martinsson, Johan Svennung, Peter Lameli, Ottmar Locher, Christoph Schiedt, Martin Bepler, Hans Waigel
Life of this patent
Estimating the term…
Abstract
A self-powered chainsaw, typically a battery powered chainsaw, including a housing, a power source, an endless cutting chain having a plurality of cutting elements and a motor arranged to drive the chain relative to the housing using power from the power source. The chainsaw also includes a sharpening element which is arranged so as to be driven relative to the cutting elements and the housing using the power source.
Claims9
A self-powered chainsaw, comprising;
- a housing,
- an electric power source,
- an endless cutting chain having a plurality of cutting elements,
- an electric motor arranged to drive the chain relative to the housing using power from the electric power source,
- a sharpening element which is configured to be driven relative to the cutting elements and the housing, and
- a controller configured to control how the endless cutting chain is driven, the controller having a normal mode in which the endless cutting chain is continuously driven so that it is usable for cutting, and a step mode in which the chain is driven only in discrete steps, and wherein the sharpening element uses the electric power source and is driven at least a portion of the time when the controller is operating in the step mode, wherein in the step mode, the electric motor drives the endless cutting chain in steps, wherein a size of each step is determined by the spacing of the cutting elements of the chain.
3 more elements
Dependencies are inferred from the claim text.