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US 11,534,565 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. The resilient motor mount couples the stator and the housing and provides compliance and/or damping for the motor.
Claims28
A breathing assistance apparatus comprising:
- a pressurised gases source comprising:
- a housing,
- a gases inlet,
- a gases outlet configured to emit pressurised gases, and
- a motor comprising:
- a rotor comprising a central opening, the central opening comprising a central portion with an indent,
- a rotatable shaft arranged to extend through the central opening,
- a one-piece plastic insert in contact with the rotatable shaft and the indent of the central opening, thereby directly coupling the rotatable shaft to the rotor, and
- at least one bearing structure that supports the rotatable shaft within a stator.
6 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, and
- a motor comprising:
- a rotor comprising a central opening, the central opening comprising a central portion with an indent,
- a rotatable plastic shaft being formed with an integrated portion that is arranged to engage with the indent, thereby coupling the rotatable plastic shaft to the rotor, and
- at least one bearing structure that supports the rotatable plastic shaft within a stator.
5 more elements
Dependencies are inferred from the claim text.