Respirator mask

• US 6,530,373 B1
• Filed: 08/04/2000
• Issued: 03/11/2003
• Est. Priority Date: 08/04/2000
• Status: Expired due to Term

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Mallinckrodt Incorporated (Mallinckrodt plc)
• Inventors: Sullivan, Michael, Jue, Clifford T., Lai, John W., Kronich, Christine G., Weintraub, Jeff C., Bonnette, Bradley J., Wilkins, Dan P., Patron, Anthony P., Hansen, Gary L., Bordewick, Steven S.
• Primary Examiner(s): Dawson, Glenn K.
• Application Number:
  US09/632,625
• Time in Patent Office: 949 Days
• Field of Search: 128/200.24, 128/200.27, 128/201.12, 128/201.15, 128/201.19, 128/201.22, 128/201.25, 128/203.29, 128/205.25, 128/206-2-2, 128/207.11, 128/207.17, 128/207.18
• US Class Current: 128/205.25
• 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: A61M 16/0633 with forehead support

Abstract

A respirator mask seal and shell are provided according to one embodiment of the invention. The respirator mask seal and shell includes a mask shell having a face opening, a slot for air passage, and at least one attachment portion spaced around the face opening. They also include a movable interface having a hose connector and a contoured opening adapted to fit against the mask shell. The contoured opening is slidable over the slot and is capable of being positioned on the mask shell. The mask seal has a flexible sidewall having distal and proximal ends and includes a rounded outer seal portion located on the distal end of the sidewall, a rounded inner seal portion located between the distal and proximal ends, and a support ring embedded in the sidewall. The inner seal portion is thicker than the outer seal portion and is non-continuous. The support ring includes at least one attachment portion adapted to engage the at least one attachment portion of the mask shell. The mask seal is capable of being removably affixed to the mask shell. The movable interface is capable of being positionally adjusted on the mask shell and the mask seal is capable of being inwardly deformed by contact with a face region of the user.

Claims

1. A respirator mask seal and shell, comprising:

a mask shell having a face opening, a slot for air passage, and at least one attachment portion spaced around said face opening;

a movable interface having a hose connector and a contoured opening adapted to fit against said mask shell, said contoured opening of said movable interface being slidable over said slot and capable of being positioned on said mask shell over a predetermined range;

a mask seal comprising a flexible sidewall having distal and proximal ends and including a rounded outer seal portion located on said distal end of said sidewall, a rounded inner seal portion located between said distal and proximal ends, said inner seal portion being thicker than said outer seal portion and being non-continuous around an inner surface of said mask seal, and a support ring embedded in said sidewall adjacent said proximal end, said support ring including at least one attachment portion adapted to engage said at least one attachment portion of said mask shell, with said proximal end of said mask seal being capable of being removably affixed to said mask shell;

wherein said movable interface is capable of being positionally adjusted on said mask shell so to be adaptable to a wearer, and wherein in use said mask seal is capable of being inwardly deformed by contact with a face region of said wearer.

2. The respirator mask seal and shell of claim 1, wherein said mask shell further includes a depression, with said movable interface capable of vertically sliding within said depression.

3. The respirator mask seal and shell of claim 1, wherein said movable interface further includes a headpiece slide formed as part of and extending from a portion of said movable interface.

4. The respirator mask seal and shell of claim 1, wherein said movable interface further includes a vent aperture.

5. The respirator mask seal and shell of claim 1, wherein said movable interface further includes a vent aperture, said vent aperture being capable of retaining a vent port having a predetermined vent hole size.

6. The respirator mask seal and shell of claim 1, further including an interface gasket between said movable interface and said mask shell.

7. The respirator mask seal and shell of claim 1, said movable interface further comprising a plurality of barbed tabs located on said contoured opening of said movable interface, wherein said plurality of barbed tabs are adapted to snap into said slot in said mask shell and slide in said slot to allow said movable interface to move on said mask shell.

8. The respirator mask seal and shell of claim 1, wherein said hose connector is substantially vertically oriented with respect to said mask.

9. The respirator mask seal and shell of claim 1, wherein said proximal end of said mask seal includes a flange that is formed on an inner perimeter of a mating surface of said mask seal, wherein said flange fits inside said mask shell to form a gas seal.

10. The respirator mask seal and shell of claim 1, wherein said mask seal comprises an elastomeric material.

11. The respirator mask seal and shell of claim 1, wherein said mask seal comprises silicone.

12. The respirator mask seal and shell of claim 1, wherein said rounded outer seal curves inwardly toward an interior portion of said mask.

13. The respirator mask seal and shell of claim 1, wherein said rounded inner seal curves inwardly toward an interior portion of said mask.

14. The respirator mask seal and shell of claim 1, wherein said inner seal portion is adapted for compressing said outer seal portion against a face of a wearer.

15. The respirator mask seal and shell of claim 1, wherein said support ring comprises a semi-rigid material.

16. The respirator mask seal and shell of claim 1, wherein said support ring comprises a rigid material.

17. The respirator mask seal and shell of claim 1, wherein said support ring is molded inside said side wall of said mask seal.

18. The respirator mask seal and shell of claim 1, wherein said support ring includes at least one elongate extension member that extends beyond a portion of said mask seal and engages a corresponding cavity on said mask shell.

19. The respirator mask seal and shell of claim 1, wherein said support ring of said mask seal further comprises a hinge hook and said mask shell further comprises a hinge axle, and wherein said hinge hook rotatably engages said hinge axle when said mask seal is brought into position against said mask shell.

20. The respirator mask seal and shell of claim 1, wherein said at least one attachment portion of said mask seal comprises a barbed tab.

21. A respirator mask, comprising:

a mask shell having a convex outer surface and a slot therein; and

a movable interface that movably pivots on said convex outer surface, said movable interface including a hose connector adapted to receive a gas supply hose and further including an interior passage that communicates a gas from said hose connector to said slot and to an interior region of said mask shell;

wherein said movable interface allows an angular adjustment of said mask shell with respect to a facial plane angle of a user.

22. The respirator mask of claim 21, further including an interface gasket positioned between said movable interface and said mask shell, said interface gasket facilitating motion of said movable interface on said mask shell and preventing a gas leakage between said movable interface and said mask shell.

23. The respirator mask of claim 21, wherein said movable interface has a pivot center substantially within a volume of said mask shell.

24. The respirator mask of claim 21, said movable interface further including a plurality of barbed tabs that engage an edge of said slot in said mask shell and movably hold said movable interface against said mask shell.