Oxygen mask having detachable face seal cushion

• US 2,931,356 A
• Filed: 08/25/1958
• Issued: 04/05/1960
• Est. Priority Date: 08/25/1958
• Status: Expired due to Term

• Current Assignee: Hermann Schwarz Karl
• Original Assignee: Hermann Schwarz Karl
• Inventors: HERMANN SCHWARZ KARL
• Application Number:
  US03/757,050
• Time in Patent Office: 589 Days
• US Class Current: 128/206.24
• 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 16/0683 Holding devices therefor
• CPC Class Codes: A61M 16/107 in the inspiratory path
• CPC Class Codes: A62B 18/025 Halfmasks A62B23/02 takes precedence; surgical face masks A41D13/11

Claims