Dual rate spring device for railroad car trucks

Details Dual rate spring device for railroad car trucks Dual rate spring device for railroad car trucks

1978-06-16

1980-02-05

Reger, Duane A.

Spring devices

Vehicle

Railway

267168, B61F 506, F16F 304

Patent

active

041869141

ABSTRACT:
A dual rate spring device particularly adapted for use in a suspension system of a railroad car truck includes a vertically mounted light duty spring means positioned, for example, between a side frame of the truck and a load carrying bolster of the truck to support the bolster when in a lightly loaded condition. Positioned around the light duty spring means is a shorter heavy duty spring which with the light duty spring supports the bolster when in a heavily loaded condition. To insure that the device functions properly under varying load conditions, a lower end of each spring is connected by a spring retainer.

REFERENCES:
patent: 190582 (1877-05-01), Hansell
patent: 1095641 (1914-05-01), Johnson
patent: 1934579 (1933-11-01), Wine
patent: 2386895 (1945-10-01), Haseltine

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