IMPROVEMENTS IN AND RELATING TO INTERNAL BRAKE SHOE ASSEMBLIES FOR VEHICLE DRUM BRAKES
1,273,564. Internal shoe drum brake. GIRLING Ltd. 27 June, 1969 [25 July, 1968], No. 35438/68. Heading F2E. A vehicle brake shoe assembly acting on the interior of a drum comprises a pair of opposed shoes 12 having respective webs 14 with a chordal return spring 24 lying between the opposed shoes 12 and being fixed at each end to a respective lever 26 each lever 26 being rotatably secured by a hexagon bar 28 to one web 14 intermediate the ends of the web 14 and each lever 26 being pivotable about its end remote from the spring connected ends. As shown and particularly described two springs 24 are arranged between two respective pairs of levers 26 one lever 26 on each side of each web 14. Each lever 26 is pivotable about one end of a common rigid tie bar 36 which extends between the levers 26 and holds them at constant spacing. In the modification of Fig. 3 (not shown) each lever (40) has a cranked upper portion (42) engaged by a tie bar (44) unique to that lever (40).