Patent ID: 8661638

Claim:
A wheel cylinder adjuster comprising a plurality of actuating discs and a driving wrench, said actuating discs able to match with different-sized wheel cylinders, said driving wrench able to be jointed with said actuating disc, said actuating disc having one side provided with an annular projection, said annular projection formed with a polygonal insert hole, said actuating disc having another side oppositely disposed with at least two positioning studs, said driving wrench formed with a shank, said shank having one end provided with right-handed threads and another end provided with left-handed threads on a surface, said shank bored with a crosswise insert hole at a location of the outer side of said right-handed threads and of the outer side of said left-handed threads, said shank of said driving wrench having two ends respectively protruding outward to form a polygonal positioning rod, said positioning rod inserted in said polygonal insert hole of said actuating disc, two positioning sleeves respectively and threadably combined with said right-handed threads and said left-handed threads at two ends of said shank of said driving wrench, said two positioning sleeves having an interior respectively formed with female threads to match with said right-handed threads and said left-handed threads on said shank of said driving wrench, a holding rod inserted in either one of said crosswise insert holes at two ends of said driving wrench, a positioning stop plate provided to fix one of said two positioning sleeves.