A floating caliper brake device for a railroad vehicle includes: a support pin that is supported by a cylindrical portion of a support frame in such a manner as to be slidable in a direction X; a caliper; a first and second brake shoe; a pressurizing device that moves the first brake shoe back and forth; an elastic member that is expandable and contractible in the direction X; a stopper member that is immovable relatively to the cylindrical portion in the direction X; and a moving member that is frictionally engaged with the support pin so as to be slidable in the direction X.

A floating caliper brake device for a railroad vehicle includes: a support pin that is supported by a cylindrical portion of a support frame in such a manner as to be slidable in a direction X; a caliper; a first and second brake shoe; a pressurizing device that moves the first brake shoe back and forth; an elastic member that is expandable and contractible in the direction X; a stopper member that is immovable relatively to the cylindrical portion in the direction X; and a moving member that is frictionally engaged with the support pin so as to be slidable in the direction X.

A brake caliper, in particular a sliding caliper, of a disc brake of a commercial vehicle includes a brake application portion, which extends around a holding space for holding at least one brake application device; a caliper back; two tension struts, which run substantially parallel and at a distance to one another and connect the brake application portion to the caliper back; a closure cover, which closes the holding space; and an interface for mounting a pivotable brake lever on the side of the brake application portion facing away from the closure cover. A mounting opening for inserting and removing brake pads is formed between the brake application portion, the caliper back and the tension struts. The ratio of the length of the brake application portion to the sum of the length of the brake application portion and the length of a tension strut is between 0.4 and 0.3.

A mounting for a guide pin of a disc brake and method of mounting. A mounting portion of a guide pin may have a first polygonal cross-sectional profile. A receiving portion of a brake carrier may receive the mounting portion and may have cross-sectional profile that is different than the first polygonal cross-sectional profile.

A mounting for a guide pin of a disc brake and method of mounting. A mounting portion of a guide pin may have a first polygonal cross-sectional profile. A receiving portion of a brake carrier may receive the mounting portion and may have cross-sectional profile that is different than the first polygonal cross-sectional profile.

Disclosed herein a caliper brake includes a brake disc rotating with a wheel of a vehicle; an inner brake pad and an outer brake pad respectively disposed on opposite sides of the brake disc; a pressing member configured to press the inner brake pad against the brake disc; a caliper housing in which the pressing member is movable forward and backward; a caliper bridge connected to the caliper housing and configured to press the outer brake pad against the brake disc by a reaction force in response to operation of the pressing member; a carrier fixed to a body of the vehicle; and at least one guide rod fixed to the carrier and guiding sliding movement of the caliper housing and the caliper bridge with respect to the carrier.

A guide pin for a floating-type brake caliper of a disc brake where the brake caliper may have a caliper body and a bracket. The guide pin may be configured to be placed between the caliper body and the bracket. The guide pin is configured to connect to a guide sleeve and slide at least partially within the guide sleeve. The guide pin may have a first pin coupling portion. The guide pin may also have a pin sliding portion to guide the guide pin into a sliding housing formed in either the caliper body or the bracket. The guide pin may also have a second pin coupling portion. The first pin coupling portion is arranged between the second pin coupling portion and the pin sliding portion. The first pin coupling portion is threaded to form a threaded coupling between the guide pin and the guide sleeve.

A spring for a caliper body where the spring may be shaped to be arranged straddling a brake disc for applying an elastic action on at least one brake pad to bias it away from said brake disc. The spring may have a first thrust portion and a second thrust portion adapted to apply an elastic action on at least one brake pad, biasing the brake pad at least away from the brake disc. The spring may also have a first coupling portion adapted to couple the spring with a first side bridge. The spring may also have a second coupling portion adapted to couple the spring with the second side bridge on a tangentially opposite part with respect to the first coupling portion. The spring may also have a backing portion. The spring may also have at least one concave spring portion.

A spring for a caliper body where the spring may be shaped to be arranged straddling a brake disc for applying an elastic action on at least one brake pad to bias it away from said brake disc. The spring may have a first thrust portion and a second thrust portion adapted to apply an elastic action on at least one brake pad, biasing the brake pad at least away from the brake disc. The spring may also have a first coupling portion adapted to couple the spring with a first side bridge. The spring may also have a second coupling portion adapted to couple the spring with the second side bridge on a tangentially opposite part with respect to the first coupling portion. The spring may also have a backing portion. The spring may also have at least one concave spring portion.

A brake system that includes a brake caliper comprising an inboard side and an outboard side, the inboard side of the brake caliper includes one or more brake pistons and the outboard side of the brake caliper comprises one or more brake pistons, and a brake pad comprising a first pad section and a second pad section. During a service brake apply, both of the first pad section and the second pad section are moved against a braking surface to create a clamping force. During a parking brake apply, only one of the first pad section and the second pad section is moved against the braking surface to create a clamping force. The first pad section comprises a friction material having a coefficient of friction that is different than a coefficient of friction of the second pad section.