Respirator face mask
Method for measuring the degree of nasality
Alarm system for respirator apparatus and method of use
Method and apparatus for determining respirator face mask fit
ApplicationNo. 028720 filed on 03/09/1993
US Classes:128/204.18, Means for supplying respiratory gas under positive pressure128/204.23, Means for sensing condition of user's body128/205.25Face mask covering a breathing passage
ExaminersPrimary: Burr, Edgar S.
Assistant: Lewis, Aaron J.
Attorney, Agent or Firm
Foreign Patent References
International ClassA61M 016/00
AbstractAn oral respiratory mouth mask for breath-by-breath ventilatory measurements on humans constructed of silicone or like material. The mouth mask has a curved face sealing flange adapted to sealably engage the user's skin about the mouth and nose including an internal mouth-enclosing chamber having a relatively small dead space within the mask for improved accuracy in ventilatory and metabolism measurements. A direction airflow tubing assembly secured to and in flow communication with the mouth-enclosing chamber operates to effectively direct exhalation products and inhaled air while producing minimum restrictions to normal airflow. The mask is held in a sealed position about a user's mouth by a securing assembly comprising a flexible skull cap, adjustable elastic straps and quick connect fasteners which cooperate with pendulatory eccentric buttons integrally formed on the outer surface of the face mask.