Industrial vacuum cleaner

An industrial vacuum cleaner comprising a housing including a main cylindrical body and an upper and a lower frusto-conical body secured one to each end of the main body, support means to support said housing in an upright position, means located in said upper frusto-conical body to suck air upwardly through said housing and discharge the same through an upper opening of said upper frusto-conical body, said lower frusto-conical body having an inlet port in the side wall thereof for admitting dust-laden air into said housing, and having a bottom opening, plug means removably closing said bottom opening, filter means located in said cylindrical body between said inlet port and said means to suck air, and pre-separator means for preventing water which might be present in the dust-laden air from attaining the filter means, said pre-separator means including an outer and an inner frusto-conical tube fixedly mounted within said lower frusto-conical body in spaced relationship one with the other and with said lower frusto-conical body, annular partition wall means located at the connection of said cylindrical body with the lower frusto-conical body and separating the inside of said cylindrical body from the spaces between said lower frusto-conical body and said outer and inner frusto-conical tubes, said inner frusto-conical tube being in full communication with the inside of said cylindrical body, said outer frusto-conical tube having an inlet opening diametrically opposite said inlet port and being otherwise imperforate, said inner frusto-conical tube having a plurality of baffled openings diametrically opposite said inlet opening, said two frusto-conical tubes each having a bottom opening registering with each other and with the bottom opening of said lower frusto-conical body.