Tub for humidifier
AssigneeResMed Pty Ltd
InventorsJohn Michael Snow, Simon Robert Cork, John Zekic, Benjamin John Hunter
Life of this patent
Estimating the term…
Abstract
A humidifier includes a tub configured to hold a supply of water. The tub includes a tub lid and a tub base adapted to be coupled to the tub lid. The tub further includes a base plate formed of a heat conducting material and adapted to be coupled to the tub base and a seal positioned between the base plate and the tub base. The tub also includes a retaining mechanism with at least one projection that projects from the tub base and is configured to force the base plate against the seal so that the seal is secured against the tub base.
Claims31
A tub for a humidifier configured to humidify a flow of pressurized respiratory gas, the tub comprising:
- a tub lid with an upper horizontal wall and an air outlet opening in the upper horizontal wall;
- a tub base positioned below the tub lid, the tub base and the tub lid together forming a chamber configured to receive the flow of pressurized respiratory gas and contain a body of water, the tub base comprising a bottom surface with a central rim surrounding a depression in the bottom of the tub;
- a plurality of heat stakes extending downward from the tub base and positioned around the depression in the bottom of the tub;
- and
- a base plate attached to the bottom of the tub base, a perimeter of the base plate being greater than the perimeter of the depression in the bottom of the tub, the base plate being secured to the tub base by the plurality of heat stakes,
- wherein the base plate comprises a plurality of coplanar tabs, each coplanar tab comprising an opening that receives a corresponding one of the plurality of heat stakes,
- wherein each heat stake has a melted head portion that is larger than the opening in the corresponding one of the plurality of coplanar tabs, and
- wherein a central region of the base plate is offset from the coplanar tabs.
A CPAP device configured to deliver a pressurized flow of respiratory gas to a patient's airways, the CPAP device comprising:
- a flow generator configured to pressurize the flow of respiratory gas;
- a humidifier cradle connected to the flow generator, the humidifier cradle comprising:
- a cradle lid that movable between an open position and a closed position;
- an outlet pipe extending from the cradle lid, the outlet pipe being configured to be connected to an air delivery tube;
- and
- a heating element;
- and
- a water container configured to be removably inserted into the cradle, the water container comprising:
- a water container lid with an air outlet opening that is configured to sealingly engage the cradle lid when the water container is received by the humidifier cradle and the cradle lid is in the closed position;
- a water container base, the water container base comprising a bottom surface with an opening;
- a plurality of heat stakes extending downward from the water container base and positioned on a rim of the opening in the water container base;
- and
- a base plate that covers the opening in the bottom surface of the water container base and is secured to the water container base by the plurality of heat stakes, the base plate being configured to contact the heating element when the water container is received by the humidifier cradle,
- wherein the base plate comprises a plurality of coplanar tabs, each coplanar tab comprising an opening that receives a corresponding one of the plurality of heat stakes,
- wherein each heat stake has a melted head portion that is larger than the opening in the corresponding one of the plurality of coplanar tabs,
- wherein a central region of the base plate is offset from the coplanar tabs,
- wherein the cradle lid secures the water container in the cradle when the cradle lid is in the closed position, and
- wherein the water container is allowed to be inserted into and removed from the cradle when the cradle lid is in the open position.
Dependencies are inferred from the claim text.