Surgery – Respiratory method or device – Face mask covering a breathing passage
Reexamination Certificate
2005-07-26
2005-07-26
Bennett, Henry (Department: 3743)
Surgery
Respiratory method or device
Face mask covering a breathing passage
C128S206290
Reexamination Certificate
active
06920880
ABSTRACT:
A method for purging air in a goggle area on the interior of a face mask is provided. A mouthpiece is positioned in front of a mouth of a person. Positive purging of air in the goggle area on the interior of the face mask is assured by permitting air to flow from the goggle area on the interior of the face mask to the mouthpiece airway while substantially preventing air flow in the opposite direction to the goggle area. Air is purged through the mouthpiece by affirmative, breath-driven, passive ventilation while permitting a person to breathe freely and without distraction, obstruction, or deliberate action, by normal breathing with the lips in a natural position just behind the mouthpiece. Increased ventilation on the interior of the face mask is selectively forced by puckering the person's lips to engage the mouthpiece while not requiring support or retention of the mouthpiece.
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Hollowell William M.
Zahrt Justin W.
Bennett Henry
Zahrt Justin W.
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