Patent ID: 7216940

Claim:
An apparatus engageable with a railway vehicle truck-mounted braking system for compensating for truck bolster movement, said apparatus comprising: (a) a first actuating means mounted to a fixed member of said truck-mounted braking system, said first actuating means including; (i) a cylindrical casing attached to said fixed member of said truck-mounted brake system, (ii) a pneumatic fluid pressure operated piston axially movable in said cylindrical casing; casing (iii) a first fluid pressure communicating means disposed adjacent one end of said cylindrical casing for receiving pneumatic pressure, and (iv) a second fluid pressure communicating means for supplying fluid pressure from said cylindrical casing to a main cylinder upon complete travel of said piston (b) a force transmitting means includes a wedge member attached to said first actuating means for reciprocal motion thereof and for transmitting force generated by said first actuating means onto linkage disposed within said truck-mounted braking system; (c) a force receiving means disposed within said linkage; and (d) a fluid pressure communication means disposed between said first actuating means and a second actuating means disposed within said truck-mounted braking system.