Patent ID: 8640533

Claim:
A device ( 1 ) for testing pneumatically operated brakes of a first vehicle ( 22 ) and of a second vehicle ( 23 ), said vehicles being connected and having interconnected brake systems, characterized by a device supply line ( 3 b ) and a device control line ( 4 b ) for connection to respective corresponding supply and control lines ( 3 a , 3 c , 4 a , 4 c ) in the vehicles such that the device ( 1 ) is fluidly connected into and between the brake system of the first vehicle ( 22 ) and the brake system of the second vehicle ( 23 ); a first valve means ( 9 ) operable for temporarily and releasably connecting the device supply line ( 3 b ) to the device control line ( 4 b ), whereby braking action is effected on the second vehicle ( 23 ) via a second vehicle control line ( 4 c ), independently of the braking action on the first vehicle ( 22 ); and a second valve means ( 10 ) operable for temporarily and releasably blocking the device control line ( 4 b ), whereby braking action is effected on the first vehicle ( 22 ) without effecting braking action on the second vehicle ( 23 ).