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US 8,261,741 B2Granted
Method and apparatus for backspill prevention
AssigneeResMed Limited
InventorsAleksandr Nagorny, David Sears
Life of this patent
Estimating the term…
Abstract
A backspill prevention apparatus prevents water from a humidifier portion of a positive airway pressure (PAP) device from reaching a blower motor of a PAP device. The backspill prevention apparatus can include a variety of different devices, and is placed somewhere along an air passageway between a blower motor and a humidifier portion of a PAP device.
Claims8
A solenoid backspill prevention apparatus comprising:
- a receiving chamber including an at least a partially closed end and at least one first hollow interior portion;
- a first magnet having a hollow center, provided to said at least one hollow interior portion,
- an engaging solenoid having a distance from a center thereof to an outer edge thereof smaller than a distance from a center of said hollow center to an outer edge thereof and interfacing with said hollow center of said first magnet such that at least a portion of said engaging solenoid is provided to said hollow center of said first magnet, said engaging solenoid including at least a first backspill stop provided to an end thereof;
- and
- said backspill stop including at least one piece of magnetically attractable material, capable of being attracted by a magnetic force;
- a housing, provided with a plurality of openings, at least partially enclosing said receiving chamber, first magnet, engaging solenoid and piece of material, and including at least one piece of magnetic material provided thereto, wherein a magnetic field generated by said magnetic material is capable of attracting said magnetically attractable material, and wherein at least one of said openings is smaller across than said backspill stop and is arranged in substantial axial alignment with said backspill stop.
3 more elements
Dependencies are inferred from the claim text.