Patent ID: 6058923
Filing Date: 2000-05-09
Classification: B28D

Abstract:
Saw blade for cutting, slotting or grooving natural rock or hard, synthetic, mineral construction materials, such as concrete, reinforced concrete, brick, ceramic, and asphalt, comprising:a sawblade body (2), a plurality of segments (3) being arranged on a circumference of the sawblade body (2), the segments (3) having radially projecting lugs (27), each of the lugs (27) being provided with an abrasive body (35);positioning means for positioning the segments (3) on the sawblade body (2), said positioning means including a thermally decoupled tongue-and-groove joint provided with a tongue (5) and a groove (17);the tongue (5) being a sawblade body web (5) disposed around the circumference of the sawblade body (2), the web (5) being thinner than a thickness of the sawblade body (2) to provide two shoulder surfaces (9) on the sawblade body (2) on opposite sides of the web (5);the groove (17) being provided at a connecting-edge region (14) of the segments (3), the connecting-edge region (14) including two lateral spaced-apart tabs (18), and a groove base (19) disposed between the tabs (18) to define the groove (17), the tabs (18) having free end edges (20), the tabs (18) also having a width (BL) slightly greater than a width (BS) of the sawblade body web (5); andthe groove (17) engagingly receiving the web (5) therein so that the free end edges (20) of the tabs (18) are support against the shoulder surfaces (9) of the sawblade body (2), and the groove base (19) is arranged at a distance from a free end edge (7) of the sawblade body web (5) to provide an annular gap (25), the annular gap (25) disposed between the free end edge (7) and the groove base (19) provides a separating gap.