Abstract: The disclosed subject matter relates to extracorporeal blood processing or other processing of fluids. Volumetric fluid balance, a required element of many such processes, may be achieved with multiple pumps or other proportioning or balancing devices which are to some extent independent of each other. This need may arise in treatments that involve multiple fluids. Safe and secure mechanisms to ensure fluid balance in such systems are described.

Abstract: A vehicle adapted for exclusively off-road operation and particularly useful as an airport ground support vehicle. The vehicle having an intermediate gross vehicle weight capacity generally in the range of approximately 6,000 to approximately 15,000 pounds. The vehicle having a frame for receiving a variety of vehicle accessories, such as a lavatory service tank, water service tank, maintenance lift or the like, and having a cab-portion for housing an operator of the vehicle located rearward of an engine. The vehicle including a drive train powered by the engine for powering the wheels of the vehicle, where the drive train, frame and engine are adapted to provide the vehicle with the intermediate gross vehicle weight capacity. The frame assembly may include a reinforced ramp resulting in the rear portion of the frame assembly having increased strength for supporting heavy loads while the front portion of the vehicle has lower profile accommodating ease of entry, exit and maneuverability.