Abstract: A pressurization system for pressurizing a covered bed of a pickup truck features an opening in the truck bed closed by a perforated grill and a duct extending from a vent at a rear of the cabin to the opening in the bed. The vent at the rear of the cabin communicates an inside of the cabin with an outside so that air inside is discharged to the outside. As such, the duct is disposed externally of the cabin and thus conveys to the covered bed the air which is discharged from the cabin through the vent.

Abstract: A pressurization system for pressurizing a covered bed of a pickup truck features an opening in the truck bed closed by a perforated grill and a duct extending from a vent at a rear of the cabin to the opening in the bed. The vent at the rear of the cabin communicates an inside of the cabin with an outside so that air inside is discharged to the outside. As such, the duct is disposed externally of the cabin and thus conveys to the covered bed the air which is discharged from the cabin through the vent.

Abstract: A support wheel for an irrigation system may comprise a rim configured to contact the ground with a ground contact surface, with the rim having an inner surface and an outer surface forming the ground contact surface. The rim may have a first edge and a second edge, with the first edge lying in a first plane. A hub may be positioned at a center of the wheel and being configured to mount on an axle. A spoke structure may extend from the hub of the wheel to the rim of the wheel. The spoke structure may include a plurality of frames, and at least one of the frames may be mounted on the inner surface of the rim along a line extending from the first edge to the second edge of the rim in a non-parallel and non-perpendicular orientation to the first plane.