Patent ID: 7350518
Filing Date: 2008-04-01
Classification: B23D,B24D,B28D,Y10T

Abstract:
1. A blade ring saw blade for making straight and curved cuts in hard workpieces, having, in combination: a ring-shaped body having substantially flat sides and narrow inner and outer peripheral edges, and a portion of reduced thickness forming a rib extending outwardly from said outer peripheral edge around the body; a first abrasive coating thicker than said body extending around said outer peripheral edge on said rib and forming an outer peripheral cutting element for said blade for making the curved and straight cuts in the workpieces; and a second abrasive coating covering the flat sides and inner peripheral edge of the body to form an inner peripheral cutting element for finishing curved cuts in the workpieces and providing smoother action as well as for cutting reversely; said inner peripheral edge and said second coating thereon defining an open central portion of said blade permitting the workpieces to be turned relative to said blade to make the curved cuts.