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US 2018/0008849 A1Published application
Fit-checking apparatus
AssigneeDesign Reality Ltd
InventorTroy Baker
Life of this patent
Estimating the term…
Abstract
A respirator fit-check apparatus has an air pressure sensor adapted, in use, to sense the air pressure within a sealed interior volume of a close-fitting respirator; an indicator adapted, in use, to indicate instructions and test results to a wearer of the respirator; and a CPU, the apparatus being configured to monitor the air pressure within the respirator and to determine and indicate whether or not the respirator seals to the face of a wearer based on a vacuum decay over a specified period of time. The apparatus may also be configured to monitor the breathing depth and/or rate of the wearer subsequent to a fit-check determination.
Claims20
A respirator fit-check apparatus comprising:
- an air pressure sensor adapted, in use, to sense the air pressure within a sealed interior volume of a close-fitting respirator;
- an indicator adapted, in use, to indicate instructions and test results to a wearer of the respirator;
- and
- a CPU operatively connected to the air pressure sensor and to the indicator, wherein the CPU is adapted, in use, to:
- indicate, via the indicator, the start of a fit-check procedure and to monitor a drop in air pressure within the sealed interior volume of the respirator until a lower threshold air pressure value is reached;
- indicate, via the indicator, that the lower threshold air pressure value has been reached and to monitor the air pressure within the sealed interior volume of the respirator for a predetermined period of time;
- indicate, via the indicator, the expiry of the predetermined period of time;
- determine whether the measured air pressure within the sealed interior volume of the respirator at the end of the said predetermined period of time is below or above an upper threshold value;
- and if the measured air pressure within the sealed interior volume of the respirator at the end of the said predetermined period of time is below the upper threshold value, to indicate, via the indicator, a “pass” result;
- or if the measured air pressure within the sealed interior volume of the respirator at the end of the said predetermined period of time is above the upper threshold value, to indicate, via the indicator, a “fail” result.
7 more elements
A respirator fit-check apparatus, comprising:
- an air pressure sensor adapted, in use, to sense the air pressure within a sealed interior volume of a close-fitting respirator;
- an indicator adapted, in use, to indicate instructions and test results to a wearer of the respirator;
- and
- a CPU operatively connected to the air pressure sensor and to the indicator, wherein the CPU is adapted, in use, to:
- indicate, via the indicator, the start of a fit-check procedure and to monitor an increase in air pressure within the sealed interior volume of the respirator until an upper threshold air pressure value is reached;
- indicate, via the indicator, that the upper threshold air pressure value has been reached and to monitor the air pressure within the sealed interior volume of the respirator for a predetermined period of time;
- indicate, via the indicator, the expiry of the predetermined period of time;
- determine whether the measured air pressure within the sealed interior volume of the respirator at the end of the said predetermined period of time is below or above a lower threshold value;
- and if the measured air pressure within the sealed interior volume of the respirator at the end of the said predetermined period of time is above the lower threshold value, to indicate, via the indicator, a “pass” result;
- or if the measured air pressure within the sealed interior volume of the respirator at the end of the said predetermined period of time is below the lower threshold value, to indicate, via the indicator, a “fail” result.
7 more elements
A method of determining the fit of a close-fitting respirator, the method comprising:
- indicating, via an indicator, the start of a fit-check procedure;
- sealing the inlet of the respirator, a wearer of the respirator inhaling to reduce the pressure within a sealed interior volume of the respirator;
- monitoring, using an air pressure sensor located within the sealed interior volume of the respirator the reduction in air pressure within sealed interior volume of the respirator;
- upon the air pressure within sealed interior volume of the respirator reaching a lower threshold value, indicating to the wearer, using an indicator, to hold his/her breath;
- monitoring the air pressure within the sealed interior volume of the respirator for a predetermined period of time;
- indicating, via the indicator, the expiry of the predetermined period of time;
- and
- determining using a CPU operatively connected to the air pressure sensor and indicator, whether the measured air pressure within the sealed interior volume of the respirator at the end of the said predetermined period of time is below or above an upper threshold value;
- and
- if the measured air pressure within the sealed interior volume of the respirator at the end of the said predetermined period of time is below the upper threshold value, indicating, via the indicator, a “pass” result;
- or if the measured air pressure within the sealed interior volume of the respirator at the end of the said predetermined period of time is above the upper threshold value, indicating, via the indicator, a “fail” result.
8 more elements
(canceled)
Dependencies are inferred from the claim text.