Patent ID: 6779228
Filing Date: 2004-08-24
Classification: A47L

Abstract:
A central vacuum power unit comprising:a canister having a sidewall and a hollow interior; a first plate extending across said hollow interior, being mounted to said sidewall and being provided with a first opening, a second plate extending across the hollow interior and being provided with a first opening, a duct means having a sidewall, a hollow interior, a first end and a second end, the first end being mounted on the first plate and having the hollow interior of said duct means in fluid communication with the first opening of the first plate, the second end being mounted to the second plate and having the hollow interior of the duct means in fluid communication with the first opening of said second plate, said duct means supporting the second plate above the first plate, the first plate and the second plate defining with the sidewall of the canister and the sidewall of the duct means an acoustic chamber, said acoustic chamber being further provided with a lining of sound absorbing material and an outlet in the sidewall of the canister, a motor-fan assembly within said canister and emitting noises and vibrations, said motor-fan assembly having an outlet connected to a pipe which is in turn connected in fluid flow communication within said acoustic chamber.