Automatic adjusters for hydraulically operated disc brakes

An hydraulically-operated disc brake for a vehicle comprising a rotatable disc, friction pad assemblies for engagement with opposite sides of said disc, an hydraulic cylinder on one side of said disc, a piston working in said cylinder to apply one of said pad assemblies to said disc, stop means incorporated in said piston for determining a retracted position of said piston, said stop means comprising a plate provided with an aperture, a pin fixed to said cylinder and projecting through said aperture in said plate, said pin having a section complementary to that of said aperture, an abutment member providing a first abutment of said plate, first spring means acting between said abutment member and said plate so as to urge said plate into a locked tilting position inclined with respect to said pin, and second spring means acting on said abutment member so as to urge it in a direction away from said pad, a second abutment on said piston being adapted to limit movement of said abutment member, said first abutment being radially outside said aperture and comprising means permitting contact between said plate and said abutment member only over a minor segment of the circumference of said aperture.

An hydraulically-operated disc brake for a vehicle, comprising a rotatable disc, a caliper straddling a portion of the peripheral edge of said disc, friction pad for engagement with opposite faces of said disc located in assemblies in said caliper on opposite sides of said disc, hydraulic cylinders in said caliper on opposite sides of said disc, pistons working in said cylinders to apply said friction pad assemblies to said disc, stop means incorporated in each piston for determining a retracted position of said piston, each of said stop means comprising a plate provided with an aperture, a pin fixed to said cylinder and projecting through said aperture in said plate, said pin having a section complementary to that of said aperture, an abutment member providing a first abutment for said plate, said abutment member being slidable relative to said piston, first spring means acting on said plate so as to urge said plate towards said pad and so as to urge said plate into a locked tilting position inclined with respect to said pin, and second spring means acting on said abutment member so as to urge it in a direction away from said pad, a second abutment on said piston being adapted to limit movement of said abutment member.

An hydraulically-operated disc brake for a vehicle, comprising a rotatable disc, a caliper straddlng a portion of the peripheral edge of said disc, friction pads for engagement with opposite faces of said disc located in assemblies in said caliper on opposite sides of said disc, hydraulic cylinders in said caliper on opposite sides of said disc, pistons working in said cylinders to apply said friction pad assemblies to said disc, stop means incorporated in each piston for determining a retracted position of said piston, each of said stop means comprising a plate provided with an aperture, a pin fixed to said cylinder and projecting through said aperture in said plate, said pin having a section complementary to that of said aperture, an abutment member providing a first abutment for said plate, first spring means acting between said abutment member and said plate so as to urge said plate into a locked tilting position inclined with respect to said pin, and second spring means acting on said abutment member so as to urge it in a direction away from said pad, a second abutment on said piston being adapted to limit movement of said abutment member, said first abutment being radially outside said aperture and comprising means permitting contact between said plate and said abutment member only over a minor segment of the circumference of said aperture.