Respirator headpiece and release mechanism

• US 6,497,232 B2
• Filed: 10/16/2001
• Issued: 12/24/2002
• Est. Priority Date: 02/22/1999
• Status: Expired due to Term

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: Cabot Safety Intermediate Corporation et al
• Inventors: Krauss, Kevin M., Fecteau, Keith E., Levin, Alan, Honan, David
• Primary Examiner(s): Ruhl, Dennis
• Assistant Examiner(s): Mendoza, Michael G.
• Application Number:
  US09/981,576
• Publication Number:
  US 20020078953A1
• Time in Patent Office: 434 Days
• Field of Search: 128/205.25, 128/206.12, 128/206.21, 128/206.24, 128/207.11, 128/201.24, 242/1, 241/7
• US Class Current: 128/207.11
• CPC Class Codes: A62B 18/084 Means for fastening gas-masks to heads or helmets

Abstract

A quick release mechanism and headpiece for use with a respirator. The quick release mechanism uses a cam latch pivotally attached to a yoke to control the tension in an upper tension strap. In the latched position the upper tension strap traverses the yoke to support and seal the respirator mask against the face of the wearer. In the unlatched position the upper tension straps loosely support the mask below the chin of the wearer in a parked position. In one embodiment, a guide is provided on the yoke to ensure that the mask may be consistently donned and doffed with minimal effort (e.g., potential one-handed donning and doffing). An opening may also be provided in the face mask and optionally in the yoke, and a filter may be disposed within the opening to provide the desired filtration of inhaled gases.

Claims

1. A quick release respirator mechanism comprising:

a yoke attached to a respirator face mask;

a latch attached to the yoke;

at least one guide associated with the yoke;

at least one strap attached to the latch, the at least one strap disposed within the at least one guide.

2. A mechanism as set forth in claim 1 wherein the latch is pivotally attached to the yoke at a first end of the latch.

3. A mechanism as set forth in claim 1, further including at least one opening in the face mask, and wherein the at least one opening includes at least one filter disposed within the opening.

4. A mechanism as set forth in claim 1, wherein the respirator mechanism further includes a headpiece, wherein the yoke includes a pair of guide holes, a pair of straps are attached to the latch at a pair of lock holes positioned in the latch at a second end thereof, and wherein the pair of straps are disposed within the pair of guide holes and are attached to the headpiece.

5. A mechanism as set forth in claim 4 wherein the straps are comprised of a resilient material having a substantially round cross section.

6. A mechanism as set forth in claim 4 wherein the latch is pivoted from an unlatched position to a latched position, and wherein a tension force is produced in the straps in the latched position biasing the mask against a face of a wearer.

7. A mechanism as set forth in claim 4, further comprising:

a pair of attachment points positioned in the yoke; and

a pair of straps attached to the headpiece, the straps disposed at the attachment points.

8. A mechanism as set forth in claim 7 wherein the attachment points each comprise a cinching mechanism comprising a pair of slots.

9. A mechanism as set forth in claim 8 wherein the cinching mechanisms comprise a D-ring attached to the yoke.

10. A mechanism as set forth in claim 1 wherein the yoke is comprised of a rigid plastic material.

11. A mechanism as set forth in claim 1 wherein the latch is comprised of a rigid plastic material.

12. A quick release respirator mechanism comprising:

a yoke attached to a respirator face mask;

a latch attached to the yoke;

at least one guide associated with the yoke;

at least one strap attached to the latch;

at least one opening disposed in the face mask;

at least one filter disposed within the opening.

13. A mechanism as set forth in claim 12 wherein the latch is pivotally attached to the yoke at a first end of the latch.

14. A mechanism as set forth in claim 12, wherein the respirator mechanism

further includes a headpiece, wherein the yoke includes a pair of guide holes, a pair of straps is attached to the latch at a pair of lock holes positioned in the latch at a second end thereof, and wherein the pair of straps are disposed within the pair of guide holes and are attached to the headpiece.

15. A mechanism as set forth in claim 14 wherein the straps are comprised of a resilient material having a substantially round cross section.

16. A mechanism as set forth in claim 14 wherein the latch is pivoted from an unlatched position to a latched position, and wherein a tension force is produced in the straps in the latched position biasing the mask against a face of a wearer.

17. A mechanism as set forth in claim 14, further comprising:

a pair of attachment points positioned in the yoke; and

a pair of straps attached to the headpiece, the straps disposed at the attachment points.

18. A mechanism as set forth in claim 17 wherein the attachment points each comprise a cinching mechanism comprising a pair of slots.

19. A mechanism as set forth in claim 18 wherein the cinching mechanisms comprise a D-ring attached to the yoke.

20. A mechanism as set forth in claim 12 wherein the yoke is comprised of a rigid plastic material.

21. A mechanism as set forth in claim 12 wherein the latch is comprised of a rigid plastic material.