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Fresh air port mechanism for facepiece used on self-contained open-circuit compressed air breathing apparatus

A technology of breathing equipment and fresh air, applied in breathing masks, respirators, life-saving equipment, etc., can solve the problems of difficult valve disconnection or removal, long time consumption, etc.

Active Publication Date: 2016-06-15
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it may be difficult or time consuming to disconnect the demand valve or remove the mask of the SCBA

Method used

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  • Fresh air port mechanism for facepiece used on self-contained open-circuit compressed air breathing apparatus
  • Fresh air port mechanism for facepiece used on self-contained open-circuit compressed air breathing apparatus
  • Fresh air port mechanism for facepiece used on self-contained open-circuit compressed air breathing apparatus

Examples

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Embodiment Construction

[0028] It should be appreciated that at the outset, although illustrated implementations of one or more embodiments are set forth below, the disclosed systems and methods may be implemented using any number of technologies, whether currently known or not in existence. The disclosure should not be limited in any way to the implementation, drawings and techniques illustrated below, but may be modified within the full scope of the appended claims and their equivalents.

[0029] In general, the present applicants have discovered that incorporating a fresh air port assembly into the mask of a self-contained breathing apparatus (SCBA) can be beneficial in enabling a user to breathe ambient air when purified air is not required. For example, the user may be in a waiting area and may wish to preserve the air in the cylinders of the SCBA, so the user may wish to temporarily switch to ambient air. A fresh air port assembly positioned between the SCBA's demand valve and the mask can be o...

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PUM

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Abstract

Embodiments generally relate to methods, systems, and apparatus for opening and closing one or more ports (1402) to allow a wearer of a self-contained breathing apparatus (SCBA) (100) to breathe ambient air. The incorporation of the fresh air port assembly (300) into the mask (102) of the SCBA (100) allows the user to breathe ambient air when purified air is not required and may allow the user to quickly switch to purified air when desired air. Fresh air port assembly (300) positioned between demand valve (104) and mask (102) of SCBA (100) may be operable to disconnect demand valve (104) and / or disable demand valve (104) , to allow ambient air to enter the mask (102), and to control the exhalation valve (202) of the mask (102) so that the user can easily breathe the ambient air.

Description

[0001] Cross References to Related Applications [0002] none. [0003] Statement Regarding Federally Sponsored Research or Development [0004] Not applicable. [0005] Microfiche Citation [0006] Not applicable. Background technique [0007] Typically, self-contained breathing apparatus (or SCBA) may use a demand valve to control the flow of air from one or more cylinders into the mask for breathing by the user. The demand valve is controllable by pressure from the user's breath, allowing air flow when the user inhales and stopping air flow when the user exhales. In some situations, the user may wish to breathe ambient air when possible, such as when the user is in a holding area or has exited a hazardous environment, in order to preserve the air stored in the SCBA's cylinder. However, it may be difficult or time consuming to disconnect the demand valve or remove the mask of the SCBA. The applicants have discovered that the use of an intermediate device can provide th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62B7/02A62B9/02A62B18/02A61M16/00
CPCA62B9/02A62B7/02A62B18/02A62B18/10
Inventor J.郑B.刘K.陆R.叶
Owner HONEYWELL INT INC
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