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

B - Operations, Transporting

61

F

105/78

B61F 5/06 (2006.01) F16F 3/04 (2006.01)

Patent

CA 1108472

JLS: pm 5/15/7 8 Case 5638 Revised 6/5/78 DUAL RATE SPRING DEVICE FOR RAILROAD CAR TRUCKS ABSTRACT OF THE DISCLOSURE 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. -i-

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