Load compensating truck mounted brake system
OwnerRene H. Brodeur, Boris S. Terlecky +1inventors
InventorsRene H. Brodeur, Boris S. Terlecky, Gerald R. Misner
Life of this patent
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Abstract
The present invention encompasses a truck mounted brake system for double axle wheel trucks with pneumatic means operable through multiple levers to move the brake beams relative to each other. The lever system includes a double acting slack adjuster responsive to load changes to vary the braking force. Different load weights on the bolster causes it to assume different vertical positions relative to the side frames and the slack adjuster to vary in length so that uniform pressure to the pneumatic means produces higher brake pressure to the wheels of fully loaded cars and lower brake pressures to partially loaded and unloaded cars.
Claims23
A load compensating brake system for a wheel truck which includes a bolster resiliently supported on a pair of side frames, said frames being mounted on a spaced pair of axles having wheels at each end, said brake system including a pair of brake beams extending across the wheel truck adjacent respective ones of the axles with brake shoes at each end for engaging the wheels, and expandable pneumatic means supported on said bolster, a multiple lever system inter-connecting said expandable pneumatic means and said brake beams and operable to move said beams relative to each other to press said brake shoes against said wheels upon pressurization of said expandable pneumatic means, said lever system including a double acting slack adjuster having a trigger rod, the slack adjuster being operable under control of the trigger rod to increase and decrease in length to change the travel of said beams required for engagement of said shoes with said wheels, and actuator means responsive to the vertical position of said bolster relative to said side frames operable to change position of said slack adjuster trigger rod immediately upon a change in load on said bolster;
- wherein said multiple lever system includes:
- a live lever having an end connected to one of said brake beams and an opposite end operatively connected to said expandable pneumatic means,
- a dead lever having an end connected to the other of said brake beams and an opposite end connected to said bolster, said double acting slack adjuster being connected at opposite ends thereof to said live lever and said dead lever intermediate the ends of said live and dead levers.
Dependencies are inferred from the claim text.