Abstract: A vacuum cleaner has a cyclone module assembly comprising a cyclone separation chamber for separating dust and debris from air with the generation of a cyclonic airflow vortex forming a vortex tail, the cyclone separation chamber having an inlet opening in fluid communication with the suction nozzle through the working air path and an outlet opening for discharging cleaned air, and a dirt cup for collecting dust and debris that is separated from the air in the cyclone separation chamber. The inlet opening in the cyclone separation chamber is formed with a pair of opposed inlets. The opposed inlets can be symmetrically or asymmetrically positioned with respect to each other. The cyclone separation chamber can comprise first and second concentric cyclone separation chambers and the opposed inlets can form the inlet opening to the second or inner cyclone separation chamber.

Abstract: A vacuum cleaner has a cyclone module assembly comprising a cyclone separation chamber for separating dust and debris from air with the generation of a cyclonic airflow vortex forming a vortex tail, the cyclone separation chamber having an inlet opening in fluid communication with the suction nozzle through the working air path and an outlet opening for discharging cleaned air, and a dirt cup for collecting dust and debris that is separated from the air in the cyclone separation chamber. The inlet opening in the cyclone separation chamber is formed with a pair of opposed inlets. The opposed inlets can be symmetrically or asymmetrically positioned with respect to each other. The cyclone separation chamber can comprise first and second concentric cyclone separation chambers and the opposed inlets can form the inlet opening to the second or inner cyclone separation chamber.

Abstract: A small low power portable transmitter for remote covert surveillance is disclosed. The transmitter includes a scrambler, forward error correction encoder, differential encoder, spread spectrum system and a modulator. The transmitter may be configured to transmit a single input signal or multiple input signals. The transmitter is powered by a portable single voltage power supply. All digital components of the transmitter may be implemented in a field programmable gate array and the transmitter may be easily modified to accommodate different applications.

Abstract: The invention is a method of introducing an aggressive liquid additive into a vapor-containing process stream including (a) heating the liquid additive by a heating means thereby producing a heated additive; (b) passing the heated additive to an injection quill in fluid communication with the vapor-containing process stream; and (c) passing the heated additive from the injection quill into the vapor-containing process stream.