Railway rolling stock – Trucks – Bogie
Patent
1978-01-03
1980-03-11
Peters, Jr., Joseph F.
Railway rolling stock
Trucks
Bogie
105109, 105117, 105182R, 105197B, 105200, 267 3, B61F 304, B61F 506, B61F 510, B61F 552
Patent
active
041922395
ABSTRACT:
A pair of mechanical springs are disposed on an air spring on each side of a truck carrying a car body. A wide plank disposed between the pairs of mechanical springs and each of the air springs is pivoted to permit vertical movements without tilting of the air springs when the mechanical springs are deflected laterally. Shock absorber means are connected between the car body and bolster along the longitudinal axis of the bolster to control lateral shocks as when the mechanical springs are laterally deflected.
Mechanical springs in railway cars have employed pairs of mechanical springs in series with pneumatic springs. Multiple mechanical springs, in series with pneumatic springs, have included a heavy outer coil spring and an inner lighter coil spring coaxially nested with the heavy outer spring used to keep the stress levels on the individual springs relatively low. This arrangement is illustrated in U.S. Pat. 3,491,702 to A. G. Dean entitled "Series Pneumatic and Coil Spring Assembly". The series mechanical and air spring are desirable because the mechanical spring will still give support for the car if the air spring fails.
REFERENCES:
patent: 3361087 (1968-01-01), Dean
patent: 4029021 (1977-06-01), Paul
Beltran Howard
Peters Jr. Joseph F.
The Budd Company
Trueax, Jr. A. L.
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