Patent ID: 6964458

Claim:
A device for automatically resetting the emergency brake on a train of the type which is supplied with compressed air from a main conduit ( 100 ) through a conduit ( 100 a ) that branches off from the main conduit 100 , said device comprising: a handle ( 11 ) including a handgrip ( 11 a ) and a shank ( 11 b ) for activating the emergency brake; a rotary plate ( 18 ) with a substantially triangular configuration and constructed and arranged to rotate clockwise upon the command of the handle and anticlockwise upon the action of a couple of levers ( 30 and 31 ); a main piston ( 10 ) comprising a central shank ( 10 a ) having, at a first end, a T-shaped element ( 10 b ) constructed and arranged to slide inside a first chamber ( 7 ) from a resting position, in which the wings of the T are in contact with an internal wall ( 7 b ) of the first chamber ( 7 ) and compress a first spring ( 71 ) and a second spring ( 17 c ), into a working position in which the wings of the T are in contact with an opposite wall ( 7 c ) of the first chamber ( 7 ) upon the action of also the first and second springs ( 71 and 17 c ) which facilitate movement of the piston ( 10 ) and, at the other end of the shank, a substantially cylindrical element ( 10 c ) which is constructed and arranged to move inside a second chamber ( 17 ); a first tank ( 2 ) used to store air for the accumulation of the air to be used for resetting the device, after its activation, and connected to the main conduit ( 100 ) by means of first, second, third, fourth and fifth branch conduits or channels ( 3 a , 3 b , 3 c , 3 d and 3 e ); a first channel ( 2 a ), a second channel ( 2 b ) and a third channel ( 2 c ) which start at the tank ( 2 ) and arrive respectively at a third chamber ( 5 ), at the main piston ( 10 ) and at a small fourth chamber ( 6 a ), in which there is a small piston ( 6 ); the device being constructed so that the air in the first chamber ( 7 ) coming from the tank ( 2 ) expands and causes the movement of the main piston ( 10 ); a fifth channel ( 25 ) which connects together a small fifth chamber ( 14 a ) and the first chamber ( 7 ) for the flow of air to the fifth chamber and a sixth channel ( 26 ) which starts from the first chamber ( 7 ) and is constructed and arranged to release the air from the fifth chamber into the external atmosphere; sixth, seventh and eight channels ( 22 , 24 and 27 ) for supplying air to components of the device; monitoring means ( 60 ) for signaling, at the moment the train is operating normally, if the handle ( 11 ) has been pulled and the device is in the operative condition; a stabilising element ( 70 ) engaged with the shank ( 11 b ) and rotatably engaged with the device; and resetting means ( 16 ) connected to the stabilising element ( 70 ).