Disc brake

Claim 1

A disc brake, for small vehicles, comprising, in combination, a rotatable brake disc; a fixed support secured to a rigid part of the vehicle structure and constituted by two leg portions, positioned on respective opposite sides of said disc, and a head portion straddling said disc and interconnecting said two leg portions; each leg portion having a friction pad guiding part; respective friction pads mounted in said guiding parts and positioned on opposite sides of said disc; a caliper assembly constituted by two caliper leg portions positioned on respective opposite sides of said disc and constituting, respectively, an acting member and a reacting member, and a caliper head portion interconnecting said caliper leg portions; a single guide pin extending through an aperture formed in the head portion of said fixed support parallel to the axis of said disc, and extending through said caliper head portion to mount said caliper assembly on said fixed support at a point above the outer circumference of said disc to guide said caliper assembly in a direction parallel to the axis of said disc; and mechanism fixedly securing said reacting part, at a point spaced very substantially from said guide pin, to that friction pad disposed adjacent said reacting part at a point on said pad spaced very substantially from said guide pin; said mechanism positively preventing any swinging of said caliper about said guide pin relative to said fixed support by virtue of the relatively very long torque arm resulting from the location of said mechanism at such points spaced very substantially from said guide pin; said mechanism constituting the sole means restraining swinging of said caliper about said guide pin relative to said fixed support; whereby backlash of said caliper, responsive to a braking operation, is positively prevented.