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US 5,706,802 AGranted
Cold weather breathing apparatus
OwnerBruce McCormickinventor
Life of this patent
Estimating the term…
Abstract
A breathing device including a heat exchanger module retained adjacent the mouth of a user by a fabric holder. The heat exchanger module includes a wall surrounding a non-linear, tubular flow passage extending between a first air vent and a second air vent. A heat exchanging medium comprising a woven copper cloth is disposed within the flow passage. The flow passage includes a larger cross-sectional area adjacent the first air vent than adjacent the second air vent.
Claims18
A breathing device including:
- a heat exchanger module;
- said heat exchanger module including a wall surrounding an interior space;
- said interior space comprising a tubular flow passage including a first end and a second end;
- a first air vent disposed through said wall and adapted to permit both inflow and outflow of air relative to said first end of said tubular flow passage;
- a second air vent disposed through said wall and adapted to permit both inflow and outflow of air relative to said second end of said tubular flow passage;
- said tubular flow passage defining a non-linear flow path joining said first and said second air vents in fluid communication;
- a heat exchanging medium disposed within said tubular flow passage;
- and
- a holder supporting said heat exchanger module and adapted to retain said heat exchanger module in a position adjacent the face of a user;
- whereby said non-linear flow path between said first and said second air vents permits a relatively compact module to include a longer flow path within said interior space, thereby increasing the relative efficiency of said heat exchanger module by forcing longer interaction between air flowing through said flow path and said heat exchanging medium disposed within said flow path.
7 more elements
A breathing device including:
- a heat exchanger module;
- said heat exchanger module including a wall surrounding an interior space;
- said interior space comprising a tubular flow passage including a first end and a second end;
- a first air vent disposed through said wall and adapted to permit both inflow and outflow of air relative to said first end of said tubular flow passage;
- a second air vent disposed through said wall and adapted to permit both inflow and outflow of air relative to said second end of said tubular flow passage;
- said tubular flow passage defining a flow path joining said first and said second air vents in fluid communication;
- said tubular flow passage including a cross-sectional area which is larger adjacent said first air vent than adjacent said second air vent;
- a heat exchanging medium disposed within said tubular flow passage;
- and
- a holder supporting said heat exchanger module and adapted to retain said first air vent of said heat exchanger module in a position adjacent the mouth of a user;
- whereby said larger cross-sectional area of said tubular flow passage adjacent said first air vent decreases the pressure and velocity of air flowing to and from the mouth of a user, forcing longer interaction of incoming air with said heat exchanging medium adjacent the mouth of a user and thereby increasing the efficiency of said heat exchanger module.
8 more elements
A breathing device including:
- a heat exchanger module;
- a fabric holder supporting said heat exchanger module;
- said fabric holder including an upper peripheral edge and a lower peripheral edge each including a midpoint;
- said fabric holder comprising an outer fabric layer and an inner fabric layer defining pocket therebetween;
- said inner fabric layer including a first opening therein and said outer fabric layer including a second opening therein:
- said heat exchanger module including a first air vent and a second air vent each including an outwardly extending flange surrounding said vents;
- said heat exchanger module being disposed within said pocket between said outer fabric layer and said inner fabric layer;
- said flange surrounding said first air vent being disposed through said first opening in said inner fabric layer;
- and
- said flange surrounding said second air vent being disposed through said second opening in said outer fabric layer.
7 more elements
Dependencies are inferred from the claim text.