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US 10,471,225 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 breathing assistance apparatus has a pressurised gases source featuring a lightweight impeller with a plastic shaft. The impeller is shroudless. The plastic shaft is supported within the stator by a bearing structure. A resilient motor mount couples the stator and the housing and provide compliance and/or damping for the motor.
Claims20
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 comprising:
- a rotor including a central opening including a ledge,
- a homogeneous rotatable plastic shaft contacting the ledge, thereby coupling the rotatable plastic shaft to the rotor,
- at least one bearing structure to support the rotatable plastic shaft within a stator, the at least one bearing structure having one or more flexible and/or resilient bearing mounts to provide compliance and/or preload and/or damping for the rotatable plastic shaft, and
- a lightweight impeller coupled to the rotatable plastic shaft.
6 more elements
Dependencies are inferred from the claim text.