Patent ID: 6601495
Filing Date: 2003-08-05
Classification: B23D,Y10T

Abstract:
A saw blade, comprising:a cutting edge defined by a plurality of teeth spaced relative to each other, each tooth including: a tip; a rake face formed on one side of the tip; a primary clearance surface formed on the opposite side of the tip relative to the rake face and defining a primary acute relief angle; a secondary clearance surface formed on the opposite side of the primary clearance surface relative to the tip and defining a secondary acute relief angle that is less than the primary acute relief angle; a tertiary clearance surface formed on the opposite side of the secondary clearance surface relative to the first clearance surface, and defining a tertiary acute relief angle that is greater than the primary and secondary relief angles; a weld zone formed on the opposite side of the rake face relative to the tip and extending in an elongated direction of the blade from approximately one side of the tooth to the other; and a rake face protrusion formed on the opposite side of the rake face relative to the tip and extending over one end of the weld zone, wherein the rake face protrusion projects outwardly relative to a plane defined by the rake face, the secondary and tertiary clearance surfaces project outwardly on the opposite side of the tooth relative to the rake face protrusion, and at least one of the secondary and tertiary clearance surfaces extends over the weld zone on the opposite side of the tooth relative to the rake face protrusion to thereby form an increased tooth thickness at the weld zone.