Hanger-free movable subframe for tractor-trailers

Details Hanger-free movable subframe for tractor-trailers Hanger-free movable subframe for tractor-trailers

2007-12-04

2007-12-04

Dickson, Paul N. (Department: 3616)

Land vehicles

Wheeled

Running gear

C280S789000, C280S797000, C280S800000

Reexamination Certificate

active

11084325

ABSTRACT:
A movable subframe or slider box for tractor-trailers includes a pair of elongated, longitudinally-extending, spaced-apart, parallel main members, and a plurality of cross members which extend between and are attached to the main members to form a rigid slider box structure. The slider box includes a retractable pin mechanism for selectively positioning the slider box beneath the trailer. The slider box supports one or more axle/suspension systems which in turn support the vehicle wheels and tires. The slider box is free of hangers for pivotally mounting beams of the axle/suspension systems on the slider box. The beams instead are pivotally mounted directly on the main members. Each main member has an inverted generally U-shaped configuration which forms a channel, so that a bushing assembly end of each beam nests within the channel of its respective main member and is pivotally attached thereto.

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patent: 2005/0051991 (2005-03-01), Saxon et al.

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