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US 10,286,167 B2Granted
Impeller and motor assembly
AssigneeFisher & Paykel Healthcare Limited
InventorsJohannes Nicolaas Bothma, Scott Bent, Adam John Darby
Life of this patent
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Abstract
A lightweight impeller is provided for use in a pressurized gas source for a CPAP or other breathing assistance apparatus. The impeller can be shroudless or otherwise lightweight.
Claims36
A breathing assistance apparatus comprising:
- a pressurised gases source comprising:
- a gases inlet,
- a gases outlet adapted to emit pressurised gases to an outlet of the breathing assistance apparatus,
- a lightweight impeller,
- at least one bearing structure to support a rotatable shaft driving the lightweight impeller, the bearing structure comprising one or more flexible or resilient bearing mounts, the one or more bearing mounts comprising an annular body having an inner surface and an outer surface, the inner surface engaged with one or more bearings and the outer surface engaged with at least one of a stator or a stator frame, wherein the annular body is a curved annular body that curves from a low point at the inner surface to a higher point at the outer surface when the one or more bearing mounts are in an uninstalled or unassembled state, the one or more bearing mounts configured to provide axial preload to the one or more bearings, and
- a housing having a partition defining first and second interior regions within the housing, wherein the first and second regions are fluidly connected by an opening formed in or by the partition.
3 more elements
A breathing assistance apparatus comprising:
- a pressurised gases source comprising:
- a housing,
- a gases inlet,
- a gases outlet adapted to emit pressurised gases to an outlet of the breathing assistance apparatus,
- a motor with a rotatable shaft and at least one bearing structure to support the rotatable shaft within a stator, the bearing structure having one or more flexible or resilient bearing mounts to provide at least one of compliance, axial preload, or damping for the rotatable shaft, the one or more bearing mounts comprising an annular body having an inner surface and an outer surface, the inner surface engaged with one or more bearings and the outer surface engaged with the stator, wherein the annular body is a curved annular body that curves from a low point at the inner surface to a higher point at the outer surface when the one or more bearing mounts are in an uninstalled or unassembled state,
- a lightweight impeller coupled to the rotatable shaft,
- a flexible or resilient motor mount that couples the stator and the housing to provide at least one of compliance or damping for the motor, and
- a partition to define first and second interior regions within the housing, wherein the first and second regions are fluidly connected by an opening formed in or by the partition.
5 more elements
Dependencies are inferred from the claim text.