Oro-nasal face mask with improved sealing cuff

• US 3,330,273 A
• Filed: 10/15/1964
• Issued: 07/11/1967
• Est. Priority Date: 10/15/1964
• Status: Expired due to Term

• Current Assignee: Bennett V. Ray
• Original Assignee: Bennett V. Ray
• Inventors: Ray, Bennett V.
• Application Number:
  US04/404,121
• Time in Patent Office: 999 Days
• US Class Current: 128/206.26
• CPC Class Codes: A61M 16/06 Respiratory or anaesthetic masks
• CPC Class Codes: A61M 16/0616 with face sealing means comprising a flap or membrane projecting inwards, such that sealing increases with increasing inhalation gas pressure
• CPC Class Codes: A61M 16/0622 having an underlying cushion
• CPC Class Codes: A62B 18/025 Halfmasks A62B23/02 takes precedence; surgical face masks A41D13/11

Claims

1. AN ORO-NASAL MASK COMPRISING:

A FACE PIECE SHAPED TO COVER THE NOSE AND MOUTH, AND HAVING A FORWARDLY PROJECTING CENTRAL PORTION DEFINING A BREATHING CHAMBER WITH AN INLET-OUTLET PASSAGE, AND A MARGINAL EDGE CONFORMING GENERALLY TO THE SURFACE CONTOUR OF THE FACE;

AND A SEALING CUFF EXTENDING AROUND SAID FACE PIECE AT SAID MARGINAL EDGE, SAID CUFF PROVIDING IN CROSS-SECTION, A THIN FLEXIBLE FLAP EXTENDING REARWARDLY AWAY FROM SAID MARGINAL EDGE AND THEN INWARDLY GENERALLY PARALLEL TO THE ADJACENT SURFACE OF SAID MARGINAL EDGE OF SPACING THEREFROM TO PRESENT A FLAT SURFACE ADAPTED FOR SEALING ENGAGEMENT WITH THE FACE, AND SPRING MEANS INCLUDING A BAND OF RESILIENT, FLEXIBLE MATERIAL CANTILEVERED ADJACENT ONE END FROM A LOCATION ADJACENT SAID MARGINAL EDGE AND HAVING A SUPPORT PORTION DISPOSED BETWEEN SAID MARGINAL EDGE AND SAID FACE-ENGAGING FLAP PORTION AND AT SPACING THEREFROM IN ENGAGEMENT THEREWITH AND EXTENDING ALONG THE UNDERSIDE OF THE LATTER TO POSITION SAID FACE-ENGAGING FLAP PORTION FOR SUCH SEALING ENGAGEMENT AND YIELDABLY RESIST MOVEMENT THEREOF TOWARD SAID MARGINAL EDGE.