An aerodynamic curtain assembly for use with a tank trailer illustratively includes a front nose assembly, and opposing first and second side assemblies. The front nose assembly illustratively includes a front support coupled to the tank trailer, and a flexible air deflector screen coupled to the support and extending arcuately from a first upright supported by a first side of the tank trailer to a second upright supported by a second side of the tank trailer. Each of the side assemblies illustratively includes an upper support member, a lower support member, an upper coupler securing the upper end of a flexible air deflector screen to the upper support member, and a lower coupler securing the lower end of the flexible air deflector screen to the lower support member.

The present disclosure relates to a portable self-contained hand washing unit having a plurality of separate spaced apart washing stations capable of simultaneously accommodating multiple users.

Portable water delivery apparatuses and methods of use are disclosed herein. An example apparatus includes a portable frame trailer having: a base; and at least two wheels, a tank configured to be transported on the portable frame trailer, a pump for delivering water in the tank to an interface, means for coupling the pump to a water input in a structure, and a portable power supply delivering power to the pump.

A collection tank for a mobile vacuum excavator includes a front with a closed end, a rear with an open end, a door configured to be closed over the open end, and a linkage assembly having a first end attached to the door and a second end attached to the body. A first pivotal movement drives the first end and second end away from each other, and a second pivotal movement moves the first end and the second end toward each other. An actuator is attached to the first arm and to the second arm so that actuation of the actuator in a first direction drives the first pivotal movement and actuation of the actuator in a second direction drives the second arm the second pivotal movement.

A holding tank system for holding a waste, the holding tank system including: a holding tank including a floor disposed in a first plane, the holding tank configured to be supported on at least one joist disposed in a second plane, wherein the second plane is disposed at an incline with respect to the first plane.

A trailer that includes a tank with an enclosed interior space configured to hold fluid. The trailer can include a chassis that supports the tank and wheels for moving to desired locations. The tank can include planar opposing sides with rounded corners. One or more baffles can be located within the interior space. The baffles restrict the movement of the fluid within the interior space while the trailer is being moved between locations. This restriction reduces the forces that the moving fluid exerts on the tank which could cause damage to the tank that could result in leaks and failure.

A tank and a method of carrying a load and discharging a load therefrom. The tank includes a body having a first wall that bounds and defines a first compartment for carrying a load therein and a second wall spaced outwardly from at least a portion of the first wall; wherein a second compartment is defined between the first wall and the second wall. An air piping system is selectively actuated to place the first compartment and the second compartment under substantially similar or substantially equal air pressure. In one example the air piping system pumps air into the first compartment and the second compartment. In another example the air piping system evacuates air from the first and second compartments.

A drinking water supply arrangement is provided for a RV, which uses fluid conduits separate from the other fresh water supply lines of the RV, separates the pump from the living RV compartment, provides independent pump controls, and stores conventional containers of drinking water in an exteriorly accessible, temperature controlled compartment, isolated from the living compartment.

A tank trailer is provided. The tank trailer includes a tank having an interior volume adapted to contain fluid, and a manhole extending through the tank and positioned proximate a rear portion thereof and proximate to ground level. The tank trailer also includes a ventilation system having a ventilation interface communicating with the interior volume of the tank, a ventilation access port having a ventilation outlet positioned proximate the rear portion and proximate to ground level and a ventilation pipe adapted to establish fluid communication between the ventilation outlet and ventilation interface. The tank trailer further has a collection system which includes a collection pipe coupled between the ventilation interface and the ventilation pipe. The collection pipe defines an internal volume shaped and adapted to collect fluid spilling from the interior volume of the tank through the ventilation interface and at least partially prevent fluid flow into the ventilation pipe.

A portable cooking oil distribution device for filling remote fryers with fresh cooking oil. In other embodiments the device can also collect used cooking oil from the fryer. In one embodiment, a portable device includes a fresh oil tank, a three-way valve connected by piping to the fresh oil tank, a pump connected by piping to the three-way valve, and a nozzle connected by piping to the pump, the nozzle having an outlet tube connected to the piping between the pump and the nozzle. The device may also include a used oil tank, a second three-way valve connected by piping to the used oil tank, a second pump connected by piping to the three-way valve, and piping connecting the second pump to the nozzle, where the nozzle includes a inlet tube connected to the piping between the pump and the nozzle.