Abstract: A device for reducing drag experienced at a gap between a trailer coupled to a tractor. The device includes an enclosure having a top portion extending between a first side portion and a second side portion. Forward portions of the first and second side portions of the enclosure are coupled to first and second spool assemblies, respectively, coupled to a rear portion of the tractor and configured to maintain tension in the first and second side portions, respectively, of the enclosure. Rearward portions of the top, first side, and second side portions of the enclosure are coupled to the trailer by a coupling assembly. The first side portion extends from the first spool assembly to the trailer. The second side portion of the enclosure extends from the second spool assembly to the trailer. The top portion covers at least a portion of the gap defined between the tractor and trailer.

Abstract: A device for reducing drag caused by a rear wake of a trailer. The device includes an enclosure supported by support assemblies. The support assemblies include a first corner support extending along a first junction between top and first side portions of the enclosure, a second corner support extending along a second junction between the top portion and a second side portion of the enclosure, a third corner support extending along a third junction between a bottom portion and the second side portion of the enclosure, a fourth corner support extending along a fourth junction between the bottom and first side portions of the enclosure, a first diagonal support extending from the first junction to the third junction, and a second diagonal support extending from the second junction to the fourth junction. The enclosure and support assemblies are coupled to the trailer by a coupling assembly.

Abstract: A device for reducing drag experienced at a gap between a trailer coupled to a tractor. The device includes an enclosure having a top portion extending between a first side portion and a second side portion. Forward portions of the first and second side portions of the enclosure are coupled to first and second spool assemblies, respectively, coupled to a rear portion of the tractor and configured to maintain tension in the first and second side portions, respectively, of the enclosure. Rearward portions of the top, first side, and second side portions of the enclosure are coupled to the trailer by a coupling assembly. The first side portion extends from the first spool assembly to the trailer. The second side portion of the enclosure extends from the second spool assembly to the trailer. The top portion covers at least a portion of the gap defined between the tractor and trailer.