Cleaning system for removing dust deposits from ductwork

Claim 1

A sonic cleaning system for removing contaminants for ductwork comprising: a. a compressor for supplying a source of compressed air; b. a reservoir for containing the compressed air supplied from the compressor; c. a tunable sound generator which receives a continuous flow of compressed air from the reservoir and interrupts the air flow at a given frequency to produce a pulse sequence of air pulses of the frequency for a short duration; d. a pressure sensor for measuring the pressure of the compressed air in the reservoir; e. an electrical control system for supplying electricity to the compressor, the sound generator, for monitoring the pressure sensor and for starting and stopping the generator and the compressor in response to changes in pressure in the reservoir; f. a flexible tubular member for transmitting pressure waves connecting the generator to a proximal end of an air conduit to be cleaned where the member is capable of communicating the pulse sequence of compressed air into the conduit; and g. a contaminant collection system adapted to remove contaminants from a distal end of the conduit where the contaminants were dislodged from and entrained in the air pulses due to vibrations set up in the conduit by the pulse sequence propagating down the conduit.