HAND-OPERATED DEVICE Russian patent published in 2018 - IPC B27B17/02 

FIELD: woodworking industry.

SUBSTANCE: invention relates to the woodworking industry, in particular to chain saws. Hand-operated device has a housing on which a guiderail having a longitudinal central axis is mounted. Around the guide rail a saw chain is set in motion. Guide rail has a center plane. Drive element for the saw chain is located in the sprocket chamber enclosed by the sprocket cover. Said sprocket cover has a longitudinal edge that limits the sprocket chamber next to the first strand of the saw chain. Said first longitudinal edge for at least 50 % of its length from the region of entry into the sprocket chamber to the ejection hole is spaced from the housing by a distance measured perpendicular to the center plane which is at least the width of the chain. And the distance from the longitudinal edge of the sprocket cover in the region of the ejection hole increases in the direction of movement of the first strand, the largest distance from the longitudinal edge to the center plane being at least 110 % of the shortest distance.

EFFECT: efficiency of sawdust ejection increases.

19 cl, 20 dwg