Abstract: A fuel filtering device is provided for insertion within a fuel inlet aperture of a motor vehicle fuel tank. The device includes a thin metal tube having a filtering mesh covering the inserted end of the tube. A fume reducing barrier is supported across the interior of the tube by a resilient thin metal strip attached to the device at or near the opposite open end of the tube. An opening is formed in the body of the tube to enable the barrier to swing outwardly beyond the exterior of the tube against the resilient force of this strip when a fuel filling nozzle is inserted within the tube beyond the barrier. The device also has means for preventing the withdrawal of the device through the fuel inlet aperture of the motor vehicle when a previously inserted nozzle is withdrawn from within the device.

Abstract: A hypodermic syringe is provided which comprises a hollow barrel, a longitudinally slidable and axially rotatable plunger shaft, a sealing means, e.g., a self-resealing rubber cap or sealing gasket, and an integrally-joined cover which includes (i) a charging positioning means for longitudinally moving the shaft within the barrel, (ii) axial rotational means for rotating the shaft of about 180.degree. to a plurality of discharge positions, and (iii) discharging positioning means for longitudinally moving the shaft within the barrel. The hypodermic syringe can only be used once to inject a patient or user with a liquid.