Low friction guide bar for a chain saw
AssigneeSandvik Windsor Corporation
InventorStan Ball
Life of this patent
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Abstract
A guide bar for chain saws comprising a bar body made from a solid steel plate with a groove machined along the edges for guiding a saw chain. At least the portion of the groove sides closest to the edges of the bar body are plated with a first material layer of a thickness related to the average surface roughness (Ra) of the groove sidewalls and thereafter are plated with a much thinner second material layer.
Claims16
A guide bar for chain saws, comprising a bar body made from a solid steel plate with outer edges, sides and a groove previously machined along the edges to guide a saw chain, said groove being defined by groove side walls and a groove bottom, the groove side walls and groove bottom being internal of the outer edges and within the bar body, at least half of the groove side walls extending from the outer edges being plated with a first material layer internal of the side walls followed by a second material layer internal of the first material layer which is thinner than the first material layer.
Dependencies are inferred from the claim text.