Railway rolling stock – Trucks – Levelers
Patent
1976-02-18
1978-05-30
Werner, Frank E.
Railway rolling stock
Trucks
Levelers
105199R, 105210, B61F 510, B61F 524, B61H 904, B61H 1100
Patent
active
040917380
ABSTRACT:
A railway truck employs air springs at either side of the truck to provide a secondary suspension to support a car body, or an intermediate member between the car body and truck which in turn supports the car body. Protection against possible rupture of one of the air springs is provided by pressure responsive control valves connected to and associated with each of the air springs whereby when open, the valves exhaust fluid pressure from their associated air spring. Each control valve is pressure operated to be held in closed position by the pressure in the air spring on the other side of the truck. When one air spring ruptures the valve associated with the other air spring will open to exhaust fluid pressure from the other air spring. In the absence of a rupture each valve is held closed by the pressure in the other air spring. Leveling valves are also provided to automatically control the fluid pressure admitted to and exhausted from each of the air springs in accordance with the level of the car above the truck. In the event of uneven loading laterally of the truck the leveling valves will automatically admit fluid pressure to, or exhaust pressure from their associated air springs to compensate for the uneven loading.
REFERENCES:
patent: 2633811 (1953-04-01), Poage
patent: 2908230 (1959-10-01), Dean
patent: 3313245 (1967-04-01), Sundby
patent: 3646893 (1972-03-01), Sundby
patent: 3701397 (1972-10-01), Shirane et al.
Beltran Howard
Rockwell International Corporation
Werner Frank E.
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