Double wrap brake band and its manufacturing method

A double wrap brake band including three bands flush with each other and formed into approximately annular shape, side-by-side friction facings fastened to inner peripheral surfaces of the respective bands, each of said bands having circumferentially spaced ends, a connecting member circumferentially connecting one end of said ends of both outside bands of said three bands with a circumferential opposite end of an intermediate band of said three bands, a first bracket member secured to the opposite ends of said both outside bands, and a second bracket member secured to a circumferential one end of said intermediate band;

• characterized by that said three bands, said connecting member, and said first and second bracket members, respectively, are separately made of sheet metal, an edge for receiving a piston at a backside thereof is integrally formed on one of said first and second bracket members and an edge for receiving an anchor at a backside thereof is integrally formed on the other of said first and second bracket members, said connecting member and said first and second bracket members are, respectively, secured to corresponding places on said three bands by means of rivets and said second bracket member is provided with wing-shaped reinforcing members stretching integrally from opposite sides of a portion of said second bracket member secured to said intermediate band at the backside of said edge and in a lateral direction of said both outside bands to substantially completely cover the total width of said outside bands over an outer peripheral, circumferential portion thereof, said second bracket member extending integrally in a circumferential direction to a front side portion of said edge.