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US 11,992,613 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.
Claims21
A breathing assistance apparatus comprising:
- a pressurised gases source comprising:
- a housing,
- a gases inlet, and
- a gases outlet adapted to emit pressurised gases to an outlet of the breathing assistance apparatus, and
- a motor comprising:
- a rotor including an opening including a ledge,
- a rotatable shaft arranged to extend through the opening,
- a plastic insert contacting the rotatable shaft and the ledge, wherein the plastic insert comprises at least one axially protruding portion that contacts the rotatable shaft, and
- a lightweight impeller on the rotatable shaft.
6 more elements
A breathing assistance apparatus comprising:
- a motor comprising:
- a rotor including an opening including a ledge,
- a rotatable shaft located within a stator arranged to extend through the opening,
- a plastic insert contacting the rotatable shaft and the ledge, thereby coupling the rotatable shaft to the rotor, wherein the plastic insert comprises a continuous material between the rotatable shaft and the ledge, wherein the plastic insert comprises at least one axially protruding portion that contacts the rotatable shaft,
- at least one bearing structure to support the rotatable shaft within the stator, the at least one bearing structure having one or more flexible and/or resilient bearing mounts, and
- a lightweight impeller coupled to the rotatable shaft.
3 more elements
Dependencies are inferred from the claim text.