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FIFTH WHEEL WITH LOAD-TRANSFERRING DEVICE

  • US 3,580,609 A
  • Filed: 12/08/1969
  • Issued: 05/25/1971
  • Est. Priority Date: 12/08/1969
  • Status: Expired due to Term
First Claim
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1. A fifth wheel for connecting tractor and trailer units, said tractor unit having a frame supported on steering and drive axles, and said trailer unit having at least one axle and a coupling element, such fifth wheel comprising a coupling member pivotally supported by the tractor frame for holdably engaging the coupling element on the trailer, a flat member hinged on the forward end of the coupling member on the tractor, at least one inflatable air bag connected between the tractor frame and the flat member, and means for controllably inflating the air bag so that the flat member will impart a sufficient upward thrust on the trailer to distribute the load therein over the steering, drive and trailer axles in a preselected manner.

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