Respirator mask

• US 4,062,357 A
• Filed: 03/25/1976
• Issued: 12/13/1977
• Est. Priority Date: 04/08/1974
• Status: Expired due to Term

• Current Assignee: Asmund Sigurd Laerdal
• Original Assignee: Asmund Sigurd Laerdal
• Inventors: Laerdal, Asmund Sigurd
• Primary Examiner(s): Truluck, Dalton L.
• Assistant Examiner(s): Recla, Henry J.
• Application Number:
  US05/670,370
• Time in Patent Office: 628 Days
• Field of Search: 128/146.7, 128/146.6, 128/146, 128/145.5-145.8, 128/185, 128/142.4, 128/188, 128/195, 128/205, 128/206, 128/DIG. 26, 128/77, 24/115 K, 24/121 R, 24/129 D, 24/129 R
• US Class Current: 128/206.26
• CPC Class Codes: A61M 16/06 Respiratory or anaesthetic masks
• CPC Class Codes: A61M 16/0683 Holding devices therefor

Abstract

This invention relates to a disposable respirator mask.

The present mask includes a hollow contact rim formed from a plastics blow-moulding which is filled with compressed air.

Further, the mask is also foldable for storage purposes.

Claims

1. A respirator mask which comprises:

a yieldably resilient deformable circumferential rim formed of a plastics material for contacting the face of a person; and

a central portion peripherally attached to said rim and including an air inlet tube, said central portion having a single-walled structure made from a deformable plastics material and being dome-shaped and including at least one substantially annular area of locally reduced thickness surrounding the air inlet tube adjacent thereto having sufficient flexibility for facilitating bulging in of the central portion the interior area bound by into said rim whereby the central portion is maintained in said area.

2. The respirator mask as defined in claim 1 and including

clamping member means disposed on said central portion for receiving clamping cords for securing said mask to the head of a person, each clamping member means defining a channel between two walls for receiving and elastically clamping said cords.

3. The respirator mask as defined in claim 2 wherein the exterior portion of said mask is provided with T-shaped members with elastically deformable flaps clamping cords associated with said clamping member for securing said mask to the head of a person.

4. The respirator mask as defined in claim 1 wherein said central portion is provided with a terminal rib means for detachable mounting of said hollow rim.

5. The respirator mask as defined by claim 4 wherein said rim is formed with groove means and said central portion is formed with terminal rib means which detailably engage said groove means of said rim.

6. A respirator mask according to claim 1 wherein said central portion additionally includes an annular area of reduced thickness about the periphery of the central portion and adjacent the deformable rim.

7. A respirator mask according to claim 1 wherein said deformable rim is hollow, is filled with a gas and is permanently sealed from the atmosphere.

8. A respirator mask according to claim 7 wherein said air inlet tube extends beyond said rim in the bulged-in state.

9. The respirator mask as defined in claim 7 wherein said hollow rim is blow molded.