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US 9,517,367 B2Granted
Respiratory mask having a clean air inlet chamber
Assignee3M Innovative Properties Company
InventorsGary E. Dwyer, William A. Mittelstadt, Carl W. Raines, III, Nathan A. Abel, David M. Blomberg, Michael J. Cowell
Life of this patent
Estimating the term…
Abstract
A respiratory mask body defining a first chamber and a second chamber is provided. In an exemplary embodiment, the mask body includes one or more inlet ports adapted to receive one or more breathing air source components in communication with the first chamber and a fluid intake communication component allows communication of air from the first chamber to the second chamber during inhalation by a wearer.
Claims17
A respiratory mask, comprising:
- a mask body defining first and second chambers and having first and second inlet ports adapted to receive first and second breathing air source components;
- a fluid intake communication component;
- and
- a shut-off valve in fluid communication with the first and second chambers and operable between an open position and a closed position, wherein the shut-off valve is configured to prevent fluid communication between the first chamber and the second chamber when in the closed position,
- wherein the first chamber is in fluid communication with the first and second inlet ports and the second chamber defines a breathable air zone for a wearer, and wherein the fluid intake communication component is configured to allow communication of air from the first chamber to the second chamber through an inhalation port during inhalation by a wearer.
2 more elements
A negative pressure respiratory mask, comprising:
- a mask body comprising first and second chambers and first and second inlet ports;
- first and second filter cartridges attached to the mask body at the first and second inlet ports;
- an inner wall dividing the first chamber from the second chamber;
- an inhalation valve positioned on the inner wall at a central portion of the mask body;
- and
- a shut-off valve in fluid communication with the first and second chambers and operable between an open position and a closed position, wherein the shut-off valve is configured to prevent fluid communication between the first chamber and the second chamber when in the closed position,
- wherein the first and second filter cartridges each have an outlet in fluid communication with the first chamber, the second chamber defines a breathable air zone for a wearer, and the inhalation valve allows communication of air from the first chamber to the second chamber during inhalation by a wearer.
4 more elements
Dependencies are inferred from the claim text.