The disclosure relates to a brake caliper unit for disc brakes, comprising a carrier forming a caliper, a pneumatically operated piston/cylinder assembly, and a brake lining, wherein a piston and a cylinder have a non-circular cross section and are designed as a tandem piston assembly.

Brake calipers, molds and method of producing brake calipers are disclosed including a brake caliper mold for molding a brake caliper, the brake caliper mold comprising: a first mold section; a second section half; a core member configured to form a piston bore, the core member comprising: a tower configured to form a tower window in a bridge of the brake caliper and a piston bore extension to form a piston bore of the brake caliper; and four locator forming surfaces located on the tower, each of the four locator forming surfaces configured to form a separate lateral data reference surface on the brake caliper, the lateral data reference surfaces capable of being used for subsequent machining of the brake caliper to predetermined tolerances.

A piston boot has an annular fixing part that is formed on one end side of a stretchable part and abuts against an inner peripheral side of the cylinder. An outer peripheral surface of the annular fixing part is provided with a first region that abuts against an inner peripheral surface of the cylinder and a second region that is disposed closer to a bottom side of the cylinder than the first region in a piston axial direction. The outer diameter of the first region is larger than the inner diameter of the region of the inner peripheral surface of the cylinder that faces the second region.

A hydraulic motor brake for providing load holding torque to a hydraulic motor and comprising a housing, a plate fixedly mounted within the housing, a piston mounted for bi-directional translation relative to the plate along a longitudinal axis, and a plurality of friction-producing members arranged such that the piston and plate at least partially define a brake release chamber and the piston, normally biased in engagement with the friction-producing members to produce load holding torque, translates away from the plate and disengages from the friction-producing members to stop producing load holding torque in response to pressurized hydraulic fluid being received by the brake release chamber. The hydraulic motor brake further comprises a wear plate with the brake housing and wear plate defining bores arranged in coaxial alignment with threaded bores of the hydraulic motor for detachably attaching the hydraulic motor brake to the hydraulic motor as a self-contained unit.

A floating type disc brake device in which a body, a support and a cylinder unit are configured separately, and a first piston and a second piston are accommodated in the cylinder unit, wherein the cylinder unit is fixed to arm portions provided on both the rotation-in side and the rotation-out side of a rotor in the support via cylinder attachment portions disposed on the outer circumference side of the cylinder unit.

An anti-rotation banjo connection comprising a banjo plate attached to a pipe at its own first end edge and including an opening configured to receive a bolt, the bolt being configured to be screwed into a port of a hydraulic component, wherein a second end edge of the banjo plate, opposite to the first end edge, is provided with a positioning notch configured to partially surround a stopping fastener when the bolt is screwed into the port, whereby an edge wall delimiting the positioning notch is configured to interfere with the stopping fastener preventing the banjo plate from rotating about the bolt.

Disclosed is a railway braking system including a braking device provided with a body, a single piston that can move with respect to the body to act on a brake linkage, and delimiting, together with the body, a pressure chamber supplied by a pressure medium source for placing the piston in a rest position where the linkage applies no force on a braking member of a railway vehicle, first and second seals housed between a first section of the piston and the body, and third and fourth seals housed between a second section of the piston and the body; the first and third seals being configured to form a primary sealing of the pressure chamber and the second and fourth seals being configured to form a secondary sealing of the pressure chamber.

Disclosed herein is a brake housing. The brake housing configured such that a piston is disposed therein includes a body opened at one side thereof such that the piston is disposed therein, a support part formed on one side of the body to support the movement of the piston, and an accommodation part formed on the other side of the body to accommodate at least a portion of the piston.

A piston has a piston main body including an aluminum alloy, and a covering layer formed on the outer surface of the piston main body, and the covering layer has a first plating layer including an iron-phosphorous alloy, and a second plating layer including a nickel-phosphorous alloy formed on the first plating layer.

Brake calipers, molds and method of producing brake calipers are disclosed including a brake caliper mold for molding a brake caliper, the brake caliper mold comprising: a first mold section; a second section half; a core member configured to form a piston bore, the core member comprising: a tower configured to form a tower window in a bridge of the brake caliper and a piston bore extension to form a piston bore of the brake caliper; and four locator forming surfaces located on the tower, each of the four locator forming surfaces configured to form a separate lateral data reference surface on the brake caliper, the lateral data reference surfaces capable of being used for subsequent machining of the brake caliper to predetermined tolerances.