Chain saw tensioning device
AssigneeAktiebolaget Electrolux
InventorOskar Bergquistö
Life of this patent
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Abstract
This invention relates to a chain saw comprising an engine body on which a guide bar is arranged such that it can be moved in its length direction. The chain saw is provided with a saw chain tensioning device (16) which is operated manually without the aid of separate tools. The tensioning device comprises a screw (19) extending mainly parallel to the length direction of the guide bar. A chain tensioning nut is arranged on the screw such that the chain tensioning nut co-operates with the guide bar in order to tension the chain. The screw (19) is connected to the output shaft of a gear (20, 25) whose input shaft is connected to a tensioning wheel (26) accessible for manual adjustment from the outside of the chain saw without separate tools.
Claims5
Chain saw comprising an engine body (10) on which a guide bar (13) is arranged such that it can be moved in its length direction the chain saw being provided with a saw chain tensioning device (16) which is operated manually without the aid of separate tools and comprises a screw (19) extending mainly parallel to the length direction of the guide bar (13) and on which a chain tensioning nut is arranged such that the chain tensioning nut co-operates with the guide bar in order to tension the chain (14) characterized in that the screw (19) is connected to the output shaft of a gear (20,25) whose input shaft is connected to a tensioning wheel (26) accessible for manual adjustment from the outside of the chain saw without separate tools.
Dependencies are inferred from the claim text.