Multiple stage blowers and volutes therefor
First Claim
1. A blower assembly configured to deliver a flow of breathable gas at a continuously positive pressure with respect to ambient air pressure to a patient interface in communication with an entrance to a patient'"'"'s airways including at least an entrance of the patient'"'"'s nares, while the patient is sleeping, to ameliorate sleep disordered breathing, the blower assembly comprising:
- a motor having a shaft that extends from opposite sides of the motor;
an impeller attached to the shaft on a first side of the motor and structured to rotate in close proximity to a volute wall; and
a circuit board configured to control power supplied to the motor, wherein the circuit board is configured so that the power supplied to the motor is terminated when the impeller is closer than a predetermined distance from the volute wall.
3 Assignments
0 Petitions
Accused Products
Abstract
A blower assembly is configured to deliver a flow of breathable gas at a continuously positive pressure with respect to ambient air pressure to a patient interface in communication with an entrance to a patient'"'"'s airways including at least an entrance of the patient'"'"'s nares, while the patient is sleeping, to ameliorate sleep disordered breathing. The blower assembly includes a motor having a shaft that extends from opposite sides of the motor. The blower assembly also includes an impeller and a circuit board. The impeller is attached to the shaft on a first side of the motor and is structured to rotate in close proximity to a volute wall. The circuit board is configured to control power supplied to the motor and is configured to disable the motor when the impeller is closer than a predetermined distance from the volute wall.
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Citations
21 Claims
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1. A blower assembly configured to deliver a flow of breathable gas at a continuously positive pressure with respect to ambient air pressure to a patient interface in communication with an entrance to a patient'"'"'s airways including at least an entrance of the patient'"'"'s nares, while the patient is sleeping, to ameliorate sleep disordered breathing, the blower assembly comprising:
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a motor having a shaft that extends from opposite sides of the motor; an impeller attached to the shaft on a first side of the motor and structured to rotate in close proximity to a volute wall; and a circuit board configured to control power supplied to the motor, wherein the circuit board is configured so that the power supplied to the motor is terminated when the impeller is closer than a predetermined distance from the volute wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A blower assembly configured to deliver a flow of breathable gas at a continuously positive pressure with respect to ambient air pressure to a patient interface in communication with an entrance to a patient'"'"'s airways including at least an entrance of the patient'"'"'s nares, while the patient is sleeping, to ameliorate sleep disordered breathing, the blower assembly comprising:
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a motor having a plurality of bearings and a shaft that extends from opposite sides of the motor; an impeller attached to the shaft on a first side of the motor and structured to rotate in close proximity to a volute wall; and a circuit board configured to control power supplied to the motor, wherein the circuit board is configured so that the power supplied to the motor is terminated when bearing wear reaches a predetermined limit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A blower assembly configured to deliver a flow of breathable gas at a continuously positive pressure with respect to ambient air pressure to a patient interface in communication with an entrance to a patient'"'"'s airways including at least an entrance of the patient'"'"'s nares, while the patient is sleeping, to ameliorate sleep disordered breathing, the blower assembly comprising:
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a motor having a shaft that extends from opposite sides of the motor; an impeller attached to the shaft on a first side of the motor and structured to rotate in close proximity to a volute wall; and a circuit board configured to control power supplied to the motor, wherein the circuit board is configured to be at least partially disabled when the impeller is closer than a predetermined distance from the volute wall so that the power supplied to the motor is terminated.
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Specification