Abstract: A utility vehicle is shown for towing and servicing aircraft. The vehicle includes a frame and at least one tow hitch attached to the frame for towing an aircraft. An internal combustion engine is mounted on the frame within an enclosed interior and is connected by a power train to a pair of drive wheels for powering the vehicle. A heat recovery system within the enclosed interior receives warmed cooling air from the engine and products of combustion from the engine exhaust to route heated air to a flexible duct. The flexible duct is connected to an aircraft engine to be serviced in order to preheat the engine. The drive train of the vehicle includes a hydrostatic transmission and a differential gear box connected to the drive wheel axles. The hydrostatic transmission includes a self-centering servo mechanism for controlling the rate of speed change of the vehicle to prevent jerking an aircraft.

Abstract: A urine collection vessel is coupled to the body of a person by means of a partial vacuum created within the collection vessel. An air flow valve at the output of the vessel is adjustable to control the degree of a partial vacuum created within the vessel as well as establishing control over the velocity of air flow through the valve and down the associated conduit through which urine is conducted to a reservoir in which the urine is accumulated. The device is intended for use primarily by people who are troubled with prostate or bladder problems which, without the use of the invention, would make it necessary for these persons to frequently fully rouse themselves from sleep and to exit from their beds in order to void their bladders in the course of the night.