Patent ID: 8801040

Claim:
A tank trailer for transporting a flowable material comprising: a vessel having three portions, a front portion, a transitional portion, and a rear portion, wherein the front portion has a first internal diameter, the rear portion has a second internal diameter, and the transitional portion has an third internal diameter in between the sizes of the first and second internal diameters, wherein the rear portion has: an inner surface; a partition, said partition comprising a first vertical portion and a second horizontal portion; the first vertical portion having a first edge that fixedly adjoins a partial portion of the inner surface of said rear portion, and a second edge; the second horizontal portion having a front edge, a rear edge, and side edges; said side edges fixedly adjoin a substantially horizontal portion of the inner surface of the rear portion, the read edge that fixedly adjoins a rear wall of the rear portion; and the second edge of first vertical portion fixedly adjoins the front edge of the second horizontal portion; a rear suspension fixture fixedly attached to the rear portion of the vessel; a rear axle fixedly attached to said suspension; a valve for ingress of flowable material communicating with an interior of the vessel; an exit valve for egress of flowable material from the interior of the vessel; and a kingpin fixedly attached for attaching said tank trailer to a truck rig.