Back to results
US 6,910,483 B2Granted
Double-ended blower and volutes therefor
AssigneeResMed Limited
InventorsGeoffrey D. Daly, Alexander Virr, Stephen A. Lea, Dion Charles C. Martin, Nicholas J Reed, Larry Puckeridge, Timothy Tsun-Fai Fu
Life of this patent
Estimating the term…
Abstract
A double-ended variable speed blower for Continuous Positive Airway Pressure (CPAP) ventilation of patients includes two impellers in the gas flow path that cooperatively pressurize gas to desired pressure and flow characteristics. Thus, the double-ended blower can provide faster pressure response and desired flow characteristics over a narrower range of motor speeds, resulting in greater reliability and less acoustic noise.
Claims26
A double-ended blower comprising:
- a motor supporting opposed first and second shaft ends;
- a first impeller provided to the first shaft end, the first impeller having a first air intake;
- a second impeller provided to the second shaft end, the second impeller having a second air intake positioned between the first and second impellers;
- and
- a casing to support the motor and to at least partially define a channel closely adjacent to the motor to guide gas along an air path from the first impeller to the second impeller, wherein the channel is defined in part by a spiral path from the first impeller to the second impeller.
2 more elements
Dependencies are inferred from the claim text.