BRAKE LINING-TO-DRUM CLEARANCE AUTOMATIC ADJUSTER Russian patent published in 2004 - IPC

FIELD: transport engineering. SUBSTANCE: invention is aimed at compensating wear of brake linings in drum brakes. Proposed automatic adjuster includes wheel cylinder, pistons and adjusting unit. Adjusting unit contains rod with split adjusting bushing interference-fitted on rod and turned into one of pistons which, in its turn, is coupled with second piston by means of projections located on bushing and getting into engagement with bead on bottom of second piston with possibility of combined axial travel and provision of heavier shift force of bushing relative to rod than force developed by clamping spring. EFFECT: reduced consumption of brake fluid, decreased travel of pedal and brake distance, increased service life of sealing cups. 4 dwg