A brake cylinder for a railway vehicle includes a body, a piston assembly including a piston member and a rod having a threaded surface, and a parking brake locking mechanism including a working nut, a locking gear, and a locking pawl, with the working nut having a threaded surface engaged with the threaded surface of the rod. The piston member has a first position and a second position in a direction extending from the second end of the body toward the first end of the body. The working nut is fixed relative to the locking gear. The locking pawl has an unlocked position spaced from the locking gear and a locked position engaged with the locking gear. The piston is restricted from moving from the second position to the first position when the locking pawl is in the locked position.

A brake device for a vehicle, including: a rotary body; a friction member; an actuator including a piston and an electric motor; a piston-retracting prohibiting mechanism including a toothed wheel having ratchet teeth, a stopper configured to lock the ratchet teeth, a stopper biasing mechanism configured to bias the stopper in a direction in which the stopper moves from a locking position to a non-locking position, and a stopper keeping device configured to keep the stopper positioned at the locking position by an electric current supplied thereto, the prohibiting mechanism being configured to prohibit the piston from being retracted in a state in which the stopper locks the ratchet teeth; and a controller configured to control supply of an electric current to the electric motor and supply of the electric current to the stopper keeping device, wherein an electricity storage device is provided in parallel with the stopper keeping device.

A brake device for a vehicle, including: a rotary body; a friction member; an actuator including a piston and an electric motor; a piston-retracting prohibiting mechanism including a toothed wheel having ratchet teeth, a stopper configured to lock the ratchet teeth, a stopper biasing mechanism configured to bias the stopper in a direction in which the stopper moves from a locking position to a non-locking position, and a stopper keeping device configured to keep the stopper positioned at the locking position by an electric current supplied thereto, the prohibiting mechanism being configured to prohibit the piston from being retracted in a state in which the stopper locks the ratchet teeth; and a controller configured to control supply of an electric current to the electric motor and supply of the electric current to the stopper keeping device, wherein an electricity storage device is provided in parallel with the stopper keeping device.

Disclosed is a railway braking system including a first pneumatic distribution device formed by a first distributor provided with a single inlet opening connected to a source for supplying pneumatic pressure mediums and with a single outlet opening connected to a parking brake chamber in order to optionally supply a parking brake with a second pneumatic pressure medium so as to place the brake in either of inoperative and operative configurations, and a second pneumatic distribution device formed by a second distributor provided with a single inlet opening connected to the supply source and with a single outlet opening connected to a service pressure chamber in order to supply a service brake with a third pneumatic pressure medium of which the pressure value is predetermined, so as to apply a predetermined braking force when the parking brake is in the operative configuration thereof.

Disclosed is a railway braking system including a first pneumatic distribution device formed by a first distributor provided with a single inlet opening connected to a source for supplying pneumatic pressure mediums and with a single outlet opening connected to a parking brake chamber in order to optionally supply a parking brake with a second pneumatic pressure medium so as to place the brake in either of inoperative and operative configurations, and a second pneumatic distribution device formed by a second distributor provided with a single inlet opening connected to the supply source and with a single outlet opening connected to a service pressure chamber in order to supply a service brake with a third pneumatic pressure medium of which the pressure value is predetermined, so as to apply a predetermined braking force when the parking brake is in the operative configuration thereof.

A brake cylinder for a railway vehicle includes a body, a piston assembly including a piston member and a rod having a threaded surface, and a parking brake locking mechanism including a working nut, a locking gear, and a locking pawl, with the working nut having a threaded surface engaged with the threaded surface of the rod. The piston member has a first position and a second position in a direction extending from the second end of the body toward the first end of the body. The working nut is fixed relative to the locking gear. The locking pawl has an unlocked position spaced from the locking gear and a locked position engaged with the locking gear. The piston is restricted from moving from the second position to the first position when the locking pawl is in the locked position.

A brake cylinder for a railway vehicle includes a body, a piston assembly including a piston member and a rod having a threaded surface, and a parking brake locking mechanism including a working nut, a locking gear, and a locking pawl, with the working nut having a threaded surface engaged with the threaded surface of the rod. The piston member has a first position and a second position in a direction extending from the second end of the body toward the first end of the body. The working nut is fixed relative to the locking gear. The locking pawl has an unlocked position spaced from the locking gear and a locked position engaged with the locking gear. The piston is restricted from moving from the second position to the first position when the locking pawl is in the locked position.

A railway slipping block brake lock has a brake linkage arm connector configured to connect a brake linkage arm to a draw rod. A draw rod is connected to the brake linkage arm connector. The draw rod has a draw rod engaged position corresponding to a railway brake engaged position, and the draw rod has a draw rod disengaged position corresponding to a railway brake disengaged position. A slipping block is mounted around the draw rod. The slipping block has a wedge shaped profile that fits to a wedge-shaped opening of a retaining frame. The retaining frame has a retaining frame wedge-shaped inside profile to receive the slipping block. The slipping block releases the draw rod and disengages from the retaining frame when the draw rod moves toward an engaged position.

A railway slipping block brake lock has a brake linkage arm connector configured to connect a brake linkage arm to a draw rod. A draw rod is connected to the brake linkage arm connector. The draw rod has a draw rod engaged position corresponding to a railway brake engaged position, and the draw rod has a draw rod disengaged position corresponding to a railway brake disengaged position. A slipping block is mounted around the draw rod. The slipping block has a wedge shaped profile that fits to a wedge-shaped opening of a retaining frame. The retaining frame has a retaining frame wedge-shaped inside profile to receive the slipping block. The slipping block releases the draw rod and disengages from the retaining frame when the draw rod moves toward an engaged position.

Disclosed is a rail braking system including a detection and storage device designed to receive first information representing the position of a device for locking a service brake piston, to receive second information representing the supply of a service brake pressure chamber with a pneumatic pressure agent, to deduce information representing the application of a parking brake from the first and second information, and to store the deduced information; as a result of which the information representing the application of the parking brake is kept even if the service brake pressure chamber is no longer supplied with the pneumatic pressure agent.