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US 2015/0020800 A1Published application
End of service life indicator for a respirator
AssigneeHoneywell International Inc.
InventorPeter Tobias
Life of this patent
Estimating the term…
Abstract
Systems, methods, and devices for an end of service life indicator for a respirator are described herein. For example, a device can include a cartridge containing a filter material and an insert extending through at least a portion of the filter material having a first path with a first opening to provide a sample of air that is representative of a saturation of the filter material and a second path with a second opening configured to provide a filtered sample of the air throughout a service life of the cartridge.
Claims20
A device, comprising:
- a cartridge containing a filter material;
- and
- an insert extending through at least a portion of the filter material having a first path with a first opening configured to provide a sample of air that is representative of a saturation of the filter material and a second path with a second opening configured to provide a filtered sample of the air throughout a service life of the cartridge.
A method comprising:
- obtaining a sample of air that has traversed a substantial portion of a filter material in a respirator cartridge to provide to a sensor;
- obtaining a filtered sample of the air to provide to the sensor;
- and
- determining that a defined portion of the cartridge has been saturated with a contaminant based on the sample of air that has traversed the substantial portion of the filter material and the filtered sample of the air.
1 more element
A device, comprising:
- a cartridge containing a filter material;
- an insert extending through at least a portion of the filter material having a first path with a first opening to provide a sample of air that is representative of a saturation of the filter material and a second path with a second opening to provide a filtered sample of the air;
- and
- a sensor to receive the sample of air that is representative of the saturation of the filter material and the filtered sample of the air.
1 more element
Dependencies are inferred from the claim text.