For years, the trucking industry has been trying to eliminate the large gap between the tractor and trailer causing greater crosswinds and drag. This decreases the aerodynamics, causing greater fuel consumption and less stability with the tractor and trailer.

The Retractable Air Flow Panel system increases the aerodynamics by eliminating 90-95% of the gap between the tractor and trailer, causing much less crosswinds and drag. The results are greater fuel savings and safety. The RAFP is made of aluminum and fiberglass panels attached to the frame of the tractor. They are specific to the make and model of the tractor and the trailer and are customized to close the 90-95% gap. The RAFP is mounted on structural aluminum plats behind the tractor. The RAFP is attached to the relay controller which are connected to the speedometer on the tractor. When the tractor-trailer reaches a speed of 55 mph, the relay controller connected to the speedometer sends a signal to the electric motors, thus the RAFP opens automatically. Similarly, when the tractor-trailer decreases to a speed of 50 mph, the relay controller sends the signal to close the RAFP.

For years, the trucking industry has been trying to eliminate the large gap between the tractor and trailer causing greater crosswinds and drag. This decreases the aerodynamics, causing greater fuel consumption and less stability with the tractor and trailer.

The Retractable Air Flow Panel system increases the aerodynamics by eliminating 90-95% of the gap between the tractor and trailer, causing much less crosswinds and drag. The results are greater fuel savings and safety. The RAFP is made of aluminum and fiberglass panels attached to the frame of the tractor. They are specific to the make and model of the tractor and the trailer and are customized to close the 90-95% gap. The RAFP is mounted on structural aluminum plats behind the tractor. The RAFP is attached to the relay controller which are connected to the speedometer on the tractor. When the tractor-trailer reaches a speed of 55 mph, the relay controller connected to the speedometer sends a signal to the electric motors, thus the RAFP opens automatically. Similarly, when the tractor-trailer decreases to a speed of 50 mph, the relay controller sends the signal to close the RAFP.

A height-adjustable enclosed semitrailer having a plurality of adjustable vertical supports for raising and lowering the roof of an enclosure, the enclosure comprising a plurality an overhanging upper body in some embodiments, and a retractable rearward door adapted to retract upwardly into a spool affixed to the roof.

A height-adjustable enclosed semitrailer having a plurality of adjustable vertical supports for raising and lowering the roof of an enclosure, the enclosure comprising a plurality an overhanging upper body in some embodiments, and a retractable rearward door adapted to retract upwardly into a spool affixed to the roof.

A tailgate assembly capable of extending the volume of a truck bed having a first panel with a first end and a second end, with the first end rotatably connected to a truck bed, a second panel with a first end, a second end, and at least one side end, with the first end of the second panel rotatably connected to the second end of the first panel, and at least one folding panel rotatable connected to a side end of the second panel.

A tailgate assembly capable of extending the volume of a truck bed having a first panel with a first end and a second end, with the first end rotatably connected to a truck bed, a second panel with a first end, a second end, and at least one side end, with the first end of the second panel rotatably connected to the second end of the first panel, and at least one folding panel rotatable connected to a side end of the second panel.

A harvesting combine has a forward operator's cab and having a rear, and carrying laterally extending side trim panels from just behind the operator's cab to the rear of the harvesting combine. Deployment arms are pivotally affixed at their proximal ends to the harvesting combine and pivotally affixed to the side trim panels at their distal ends. The deployment arms are generally horizontal when the deployment arms are retracted. The deployment arm distal ends are movable outwardly and upwardly to deploy the side trim panels away from the harvesting combine. A pivoting plank carried by the inside of the side trim panels and deployable from a generally vertical stowed position to a generally horizontal position when the side trim panels have been deployed.

A harvesting combine has a forward operator's cab and having a rear, and carrying laterally extending side trim panels from just behind the operator's cab to the rear of the harvesting combine. Deployment arms are pivotally affixed at their proximal ends to the harvesting combine and pivotally affixed to the side trim panels at their distal ends. The deployment arms are generally horizontal when the deployment arms are retracted. The deployment arm distal ends are movable outwardly and upwardly to deploy the side trim panels away from the harvesting combine. A pivoting plank carried by the inside of the side trim panels and deployable from a generally vertical stowed position to a generally horizontal position when the side trim panels have been deployed.

An expandable habitation unit which includes a main frame and a main floor with an exposed habitation area. A rear module with a floor is located over a rear portion of the main floor. The rear module floor is connected to the main frame to allow limited movement over the rear portion of the main floor. A side module with a floor is located over a first side portion of the main floor. The first side module floor is connected to the main frame to allow limited movement over the first side portion of the main floor. Another side module has a floor located over a second side portion of the main floor. The second side module floor is connected to the main frame to allow limited movement over the second side portion of the main floor. The modules are moveable along their limited paths of travel to vary the size of the exposed habitation area.

An expandable habitation unit which includes a main frame and a main floor with an exposed habitation area. A rear module with a floor is located over a rear portion of the main floor. The rear module floor is connected to the main frame to allow limited movement over the rear portion of the main floor. A side module with a floor is located over a first side portion of the main floor. The first side module floor is connected to the main frame to allow limited movement over the first side portion of the main floor. Another side module has a floor located over a second side portion of the main floor. The second side module floor is connected to the main frame to allow limited movement over the second side portion of the main floor. The modules are moveable along their limited paths of travel to vary the size of the exposed habitation area.