Motor-driven chain saw

Details Motor-driven chain saw Motor-driven chain saw

B - Operations, Transporting

27

B

143/7, 143/9

B27B 17/02 (2006.01) B27B 17/08 (2006.01) B27B 33/14 (2006.01)

Patent

CA 1296972

Abstract of the Disclosure For motor-driven chain saws, there is the danger that the chain saw will be kicked back if the reaction forces suddenly increase intensely in response to the forward thrust. This kickback effect and the danger of accident associated therewith are intended to be prevented by means of a special configuration of the saw chain. The saw chain has drive links which have an approximately triangular shape and which engage the tooth gaps of the nose sprocket with inclined flanks. The drive links are configured to be asymmetrical with respect to a partition line running between the two pivot axes of the link so that the forward flank angle is greater than the rearward flank angle referred to the partition line. The two flank angles together are greater than the opening angle of the V-shaped tooth gap of the nose sprocket. The saw chain can be configured as a low-profile chain with the spacing between the pivot axes of the cutting link being at least 10 greater than the spacing of the cutting edge to the plane containing the connecting line between the two pivot axes of the cutting link. Furthermore, the depth limiter can have an area in its upper region which is at least 4 mm2.

552692

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