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US 11,571,536 B2Granted
Impeller and motor assembly
AssigneeFisher & Paykel Healthcare Limited
InventorsJohannes Nicolaas Bothma, Scott Bent, Adam John Darby
Life of this patent
Estimating the term…
Abstract
A lightweight impeller is provided for use in a pressurised gas source for a CPAP or other breathing assistance apparatus. The impeller can be shroudless or otherwise lightweight.
Claims27
A pressurised gases source comprising:
- a gases inlet,
- a gases outlet adapted to emit pressurised gases to an outlet of a breathing assistance apparatus,
- an impeller,
- a motor that drives the impeller, the motor comprising a rotatable shaft located within a stator, and at least one bearing structure that supports the rotatable shaft within the stator, the stator comprising a plurality of laminations surrounded by an insulator,
- a housing, and
- a compliant motor mount directly coupled to the plurality of laminations or the insulator of the stator, the compliant motor mount coupling the stator and the housing to provide compliant support to the stator relative to the housing, the compliant motor mount comprising a plurality of projections that encircle upper and lower surfaces of the compliant motor mount, and an end of the plurality of projections extending past the upper and lower surfaces of the compliant motor mount, the plurality of projections providing supporting leverage to the compliant motor mount and the motor.
3 more elements
A pressurised gases source comprising:
- a gases inlet,
- a gases outlet adapted to emit pressurised gases to an outlet of a breathing assistance apparatus,
- an impeller,
- a motor that drives the impeller, the motor comprising a rotatable shaft located within a stator, at least one bearing structure supporting the rotatable shaft within the stator, the at least one bearing structure comprising one or more bearing mounts and one or more bearings supported by the one or more bearing mounts about an axis of the rotatable shaft, the one or more bearing mounts having a curved annular body and, when engaged with the stator and/or a stator frame and/or other structure, the curved annular body is coerced into an engaged configuration that provides preload to the one or more bearings,
- a housing, and
- a compliant motor mount to couple the stator and the housing to provide compliant support to the motor, the compliant motor mount comprising a plurality of projections to encircle upper and lower surfaces of the compliant motor mount, and an end of the plurality of projections extending past the upper and lower surfaces of the compliant motor mount to provide supporting leverage to the compliant motor mount and the motor.
3 more elements
A pressurised gases source comprising:
- a gases inlet,
- a gases outlet adapted to emit pressurised gases to an outlet of a breathing assistance apparatus,
- an impeller,
- a motor that drives the impeller, the motor comprising a rotatable shaft located within a stator, the stator comprising a laminated stator, the laminated stator comprising an annular outer portion and a plurality of poles and windings, the laminated stator also comprising a stator frame, the stator frame having an electrical insulator covering the annular outer portion and the plurality of poles, each pole has a radial inner face with a wave shape with two concave portions meeting at a central apex, the windings being assembled on the electrical insulator covering over the plurality of poles, at least one bearing structure that supports the rotatable shaft within the stator, the at least one bearing structure comprising one or more bearing mounts and one or more bearings supported by the one or more bearing mounts about an axis of the rotatable shaft, an inner surface of the stator frame engages with the at least one bearing structure,
- a housing, and
- a compliant motor mount to couple the stator and the housing to provide compliant support to the motor, the compliant motor mount comprising a plurality of projections that encircle upper and lower surfaces of the compliant motor mount, and an end of the plurality of projections extending past the upper and lower surfaces of the compliant motor mount to provide supporting leverage to the compliant motor mount and the motor.
3 more elements
Dependencies are inferred from the claim text.