Claims
- 1. A blower assembly for providing continuous positive airway pressure to a patient comprising
an inlet muffler box which receives a turbulent stream of air which is directed along an air pathway and is transformed into an approximately laminar stream of air; a blower box comprising a centrifugal fan; and an outlet muffler box connected to a hose leading to the patient.
- 2. The blower assembly of claim 1 wherein the interior surfaces are coated with an anechoic material.
- 3. The blower assembly of claim 1 wherein the air pathway is reduced in cross sectional area from that of the hose leading to the patient.
- 4. The blower assembly of claim 3 wherein the cross sectional area of the air pathway is 20% to 50% smaller than that of the hose leading to the patient.
- 5. The blower assembly of claim 3 wherein the cross sectinal area of the air pathway is 25% to 35% smaller than that of the hose leading to the patient.
- 6. The inlet muffler box of claim 1 which comprises
a first perforated tube having a sealed end distal to an inlet orifice which receives a turbulent stream of air through the orifice; a first divider placed along the length of the first perforated tube; a second divider placed on the opposite wall from the inlet orifice; a second perforated tube having a sealed end distal to an orifice; and a third divider along the length of the second perforated tube, and an orifice opening to the blower box.
- 7. The inlet muffler box of claim 6 wherein the perforated tubes are of approximately equal length and each of the dividers is about 60% of the length of the perforated tubes.
- 8. A blower assembly for providing continuous positive airway pressure to a patient comprising
an inlet muffler box which receives a turbulent stream of air which is directed into a first perforated tube with a sealed end, whereby the air enters the muffler box through the perforations in the first tube, is directed along an air pathway by a first divider placed along the tube, is diverted by a second divider placed on the wall of the box opposite to the first perforated tube, is further diverted by a third divider placed along a second perforated tube with a sealed end, whereby transforming the turbulent stream of air into a laminar flowing stream of air which then passes through the perforations in the second tube into a blower box; and a blower box comprising a centrifugal fan; and an outlet muffler box connected to a hose leading to the patient.
- 9. The blower assembly of claim 1 or 8 wherein the outlet muffler box comprises the inlet muffler box of claim 6.
RELATED APPLICATIONS
[0001] This application takes priority from Provisional Application Ser. No. 60/431,577, filed Dec. 6, 2002.
Provisional Applications (1)
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Number |
Date |
Country |
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60431577 |
Dec 2002 |
US |