Abstract: A parking brake for vehicles, which guarantees safe parking from the very first time it is actuated, comprises a drum and at least one shoe intended to press against a cylindrical surface formed on the inside of the drum, recesses and projections being provided on said surface.

Abstract: A brake disc is provided with a visual control means of its wear conditions on at least one of its opposite side faces in correspondence of the peripheral braking strip on which the braking pads act by friction. The visual control means is in the form of a notch in the circumference of the brake disc or a circumferential throat-like or angle groove formed in the outer edge of the brake disc.

Abstract: A high braking efficiency and self-draining brake disc with wear visual control comprises a braking strip (2) having two opposite faces (2′, 2″) provided each with a swept braking surface, a bell (3) fixed to the axis of a wheel and a connection throat (4) between the braking strip (2) and the bell (3), wherein at least a face, preferably both faces (2′, 2″), of the braking strip (2) is provided with radial grooves (5) shaped as a circle arc, opened towards the outside of the braking strip (2) and communicating with the connection throat (4); the radial grooves (5) being extended on all the swept braking surface.

Abstract: Device for indicating wear of the pads of friction material in so-called floating calipers used in the disc brakes of vehicle wheels and generally comprising a caliper body (13) which is mounted so that it can slide axially by means of at least one hole (12) on at least one guide pin (10, 11), one end of which is rigidly connected, directly or indirectly, to the wheel stub axle, the axis of the guide pin and of the corresponding hole in the caliper body being perpendicular to the plane of the brake disc (18), a pair of pads (19, 20) positioned so that they straddle the disc (18), and a hydraulic piston (26) which acts directly on one (19) of the said pads and indirectly on the other pad (20), via the said caliper body (13). The device includes a linear electrical displacement transducer (34, 35) positioned between a point (32) integral with the said guide pin (10, 11) and a point (38) integral with the said caliper body (13) which slides with respect to the guide pin (10, 11).

Abstract: A disk for a disk brake which achieves an unusual vibration-damping capability and consequently a more comfortable ride comprises a braking ring and a bell having respective flanges clamped together with nut-and-bolt assemblies, as well as a plate clamped between the flanges by the nut-and-bolt assemblies.

Abstract: A disc of a disc brake for vehicles in general and for high-performance cars in particular, which is of unusually low weight, comprises a hub and an annular brake member traversed by ventilation ducts extending between an internal annular face element and an external annular face element of the annular brake member interconnected by bridging columns, a projecting portion of the brake member being embedded in the hub during the manufacture of the hub by casting in a light alloy.

Abstract: This is an invention of an improved disc brake for motor vehicles. The disc brake is of a floating caliper design with a U-shaped caliper-holder body extending through a floating caliper. Two brake pads are seated on flanges of the floating caliper. The floating caliper is a single piece, substantially rectangular, rigid frame having a hydraulic cylinder with a piston for urging the brake pads towards each other.

Abstract: A disc for a ventilated disc brake, particularly for racing cars, which has the advantage of exceptional resistance to both thermal and mechanical stresses, comprising a brake ring and a bell-shape support, in which the brake ring is structurally independent from the bell and is formed from two ring elements separated by an air space and connected by spacer elements, and is attached to the bell by way of the spacer elements.

Abstract: A bypass valve-delay valve assembly for an electric-hydraulic braking system of an electrically driven vehicle which includes a bypass valve section in which the hydraulic braking circuit ducts are obstructed by a solenoid operated valve activated by an electric signal generated by brake pedal depression, and a delay valve section in which the hydraulic fluid is obstructed by a delay valve arranged in a regulator piston whose maximum stroke equals the pressure corresponding to the maximum energy recovery performance generated by the electric drive motors' braking action. Pressure exceeding the maximum energy recovery performance of the drive motors causes the delay valve to open adding hydraulic braking to the electric drive motor braking.

Abstract: Braking system for electrically driven vehicles, equipped with electric motors on the four wheels, consisting of a combined electric-hydraulic system including at least one hydraulic circuit mated to at least one pressure transducer or sensor connected to control centers for the electric motors.

Abstract: An antiskid device for a brake system of a motorvehicle and the like, effective to prevent jamming of a wheel and at the same time ensure a braking action thereof which is consistently the equal of the best possible relatively to the road surface, comprises an on-off valve placed in a line conducting the braking fluid from a master cylinder to a braking cylinder of said system, a wheel deceleration sensor effective to generate a wheel skidding signal continuously, a surge chamber put into communication with said line downstream of said on-off valve a piston movable within said surge chamber, and a control means for said piston driven continuously by said wheel skidding signal.

Abstract: A disk for use with disk brakes, which can perform in a vibration-free manner with uniform heating, comprises a braking band formed by two annular rings in mutually spaced apart relationship and interconnected by small heat radiating pillars distributed in between the rings according to a quincunx type of arrangement.

Abstract: In a disc brake, a caliper body straddles the disc and carries disc engaging brake pads therein. The caliper body is rotatably mounted to the brake support by means of a guide including a pin on the downstream side of the pads. The caliper body is releasably secured in the brake support by means of a movable stop upstream of the pads. Threaded retainer pins engage portions of the pads to retain them within the caliper body and at the same time draw opposed portions of the caliper body together with a predetermined force.

Abstract: A disc brake in which a caliper body (3) is movable relative to a support (2) in the direction of the axis of the disc so as to locate itself on the disc. For this purpose the disc brake includes guide means (6) between the caliper body (3) and the support (2) including a pin (16) fixed to the support about which the caliper body is rotatable as well as two stop shoulders (27, 28) provided in the support and engageable with the caliper body to retain it angularly between them. Dual purpose gudgeon pin bolts (39,42 and 40, 43) not only exert a gripping force on the caliper body but also cooperate with end hook portions (41) of the respective pads on opposite sides of the disc to retain the pads in the caliper body against drag from braking.

Abstract: A brake system for motor cycles is disclosed which includes a hydraulic master cylinder supplying a front brake and a rear brake and a pressure-regulating valve having a calibrating spring adapted to limit the maximum pressure on the rear brake to a predetermined value. The compression of the calibrating spring of the pressure-regulating valve is controlled by the relative motion of two distinct points on the rear shock spring.