Patent ID: 6688206
Filing Date: 2004-02-10
Classification: B23D,Y10T

Abstract:
Saw blade for use in a circular saw having two parallel saw blades that can be driven coaxially in mutually opposite directions of rotation (S), the saw blade having a circular disc (1) with a predetermined radius (R) and a predetermined thickness (D), comprising:teeth (2) being arranged on a circumference of the circular disc (1), and air passage openings (4) being constructed as elongated holes and being arranged in substantially circular side faces (3) of the circular disc (1); a respective longitudinal extent of the air passage openings (4) extending in a direction of a circumferential arc (B) in the side faces (3) substantially parallel to the circumference of the circular disc (1) and intersecting the radius (R) of the circular disc (1) at a right angle thereto; the air passage openings (4) lying in an outer region defined by an annular area, an outer boundary of the annular area being provided by a circumference of an outer circle (K0) having a radius on the order of about 0.75 to 0.95 times the predetermined radius (R) of the circular disc (1), and an inner boundary of the annular area being provided by a circumference of an inner circle (K1) (K2) having a radius about at least half the predetermined radius (R) of the circular disc (1); the air passage openings (4) having a width (C) that is in a range of about 0.09 to 0.17 times the radius (R) of the circular disc (1); the air passage openings (4) being arranged on an outer edge (8a) of pocket-type depressions (8); each of the air passage openings (4) being assigned one inner air passage opening (7) substantially remote from the circumference of the circular disc (1); the inner air passage openings (7) being circular and being arranged in an inner region of the side faces (3) directly adjoining an inner mounting-region (6) in a radial direction; the inner air passage openings (7) being arranged on an inner edge (8b) of the depressions (8); the inner air edge (8b) and the inner air passage openings (7) being provided at least in the side face (3) of the circular disc (1) that faces a second saw blade during assembly; ribs (9) extending between the pocket-type depressions (8), the ribs (9) starting from the inner mounting region (6) and extending centrifugally outward to point counter to the direction of rotation (S); and channel-type depressions (10) being arranged within a plurality of the ribs (9).