Respiratory protection device that has rapid threaded clean air source attachment
A personal respiratory protection device 10 that comprises a mask body 12 that has a structure 35 located on it for receiving a clean air supply source such as a filter cartridge 14 . The clean air receiving structure 35 has a first threaded portion 34 . The clean air supply source has a second threaded portion 58 that has a thread 60 that mates with a thread 36 of the first threaded portion 34 . The first and second threaded portions 34 and 58 engage each other at a high thread pitch and include an integral détente. A stop prevents over-rotation of the clean air supply source 14 relative to the mask body 12 during the securement operation. The inventive device allows the clean air supply source 14 to be attached to the mask body 12 with minimal rotation and is sufficiently intuitive that users may only need one hand to attach and replace the clean air source component 14 without having to remove the respirator 10 from their face.
1. A personal respiratory protection device that comprises:
(a) a mask body that has a first threaded portion;
(b) a clean air supply source that has a second threaded portion, the second threaded portion being adapted to mate with the first threaded portion on the mask body, wherein
(i) the first and second threaded portions engage each other at a high thread pitch;
(ii) the first and second threaded portions comprise an integral détente; and
(iii) the first and second threaded portions have a stop associated therewith, which stop prevents over-rotation of the clean air supply source relative to the mask body during securement of the clean air supply source to the mask body.
2. The personal respiratory protection device of claim 1 , further comprising a resilient sealing component that is disposed between engaging portions of the clean air supply source and the mask body.
3. The personal respiratory protection device of claim 2 , wherein the clean air supply source is a filter cartridge.
4. The personal respiratory protection device of claim 1 , wherein the clean air supply source is a filter cartridge.
5. The personal respiratory protection device of claim 4 , wherein the filter cartridge includes a housing and a cover into which a filter element is contained.
6. The personal respiratory protection device of claim 1 , wherein the stop is integral to the first threaded portion, the second threaded portion, or a combination thereof.
7. The personal respiratory protection device of claim 1 , wherein the détente provides an easing of tensions between the first and second threaded portions when the détente is engaged.
8. The personal respiratory protection device of claim 1 , wherein the détente also acts to prevent inadvertent reverse rotation when engaged.
9. The personal respiratory protection device of claim 1 , wherein the mask body includes a compliant face contacting member, and wherein the resilient sealing member is integral to the compliant face contacting member.
10. The personal respiratory protection device of claim 1 , wherein the mask body includes a rigid structural member that defines exhalation and inhalation valves and provides support for a harness.
11. The personal respiratory protection device of claim 1 , wherein the high pitch thread advances axially about 5 to 15 mm per revolution.
12. The personal respiratory device of claim 1 , wherein the high pitch thread advances axially about 6 to 8 mm per revolution.
13. The personal respiratory protection device of claim 1 , wherein the first and second threaded portions each have two threads.
14. The personal respiratory protection devise of claim 13 , wherein the high pitch thread advances axially about 6 to 8 mm per revolution.
15. The personal respiratory protection device of claim 13 , wherein each thread includes a portion of an integral détente.
16. A personal respiratory protection device that comprises:
(a) a mask body that has a first threaded portion;
(b) a clean air supply source that has a second threaded portion, the second threaded portion being adapted to mate with the first threaded portion on the mask body;
(c) a means for allowing the first and second threaded portions to engage each other at a high thread pitch;
(d) a means disposed on and integral to the first and/or second threaded portions for providing an indication of engagement between the clean air supply source and the mask body; and
(e) a means for preventing over-rotation of the clean air supply source relative to the mask body during securement of the clean air supply source to the mask body.