RAILWAY VEHICLE BRAKE RIGGING SLACK ADJUSTER

摘要

The present invention teaches a double-acting compression actuatable slack adjuster to adjust the slack in the brake rigging of a railway vehicle which includes a pair of elongated members movable with respect to each other in a longitudinal direction. One of the elongated members is hollow and the other member includes a threaded portion housed within the hollow member. A positioning device carrying a pair of opposed abutting surfaces is threadedly engaged with the threaded portion of the one member. A pair of opposite facing abutment surfaces are positioned within the hollow member. A first urging device is positioned to urge the positioning device into a disengaged position. A second urging device overcomes the force of the first urging device and urges an abutting surface on the positioning device into engagement with an adjacent abutment surface. An overtravel control device is provided which is activated by a trigger device.