Patent ID: 7802535

Claim:
An electropneumatic horn assembly, comprising: an electric compressor unit having at least a compressor air inlet and a compressor air outlet for the supply of compressed air; a monolithic housing assembly having a first housing portion embodying an opening defining a space for reception of said compressor unit in first said housing portion, said housing assembly having a second housing portion; a sound wave generator system substantially housed in said second housing portion; said sound wave generator system including: at least one acoustic chamber having an opening for introduction of compressed air, a membrane member provided with an opening for sound generation and at least one acoustic duct housed in said housing assembly and communicating between said at least one acoustic chamber and at least one horn outlet to propagate sound generated by said membrane member outside said horn; air channeling means for communicating between said compressor air outlet of said compressor unit and said opening of said at least one acoustic chamber; and means for permanently affixing said electric compressor unit in said housing assembly whereby said means for permanently affixing prevents removal of said electric compressor unit and improves operational stability of said housing assembly.