Patent ID: 11911637
Assignee: FORD GLOBAL TECHNOLOGIES, LLC
Field: Other consumer goods (Other fields)
Classification: CPC A | IPC A

Claim 13:
14. The mask as recited in claim 1, further comprising:
a first valve assembly attached to an interior of the inner shell and arranged relative to the at least one first opening of the inner shell to permit inflow of air through the at least one first opening of the inner shell and restrict outflow of air from the at least one first opening of the inner shell; and
a second valve assembly attached to an exterior of the outer shell and arranged relative to the at least one second opening of the outer shell to restrict inflow of air through the at least one second opening of the outer shell and permit outflow of air from the at least one second opening of the outer shell,
wherein the first and second valve assemblies each include a plurality of openings and deflectable vanes moveable to cover and uncover the openings.