Helmet-mounted respirator apparatus with a dual plenum system

A technology for respirators and inflatable chambers, which can be used in the direction of respiratory protective containers, respiratory filters, respiratory masks, etc., and can solve the problems of bulkiness and uncomfortable weight of filter units

Inactive Publication Date: 2012-12-26
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, having a two piece system would be cumbersome and the connecting hose is yet another component that needs to be manufactured and assembled which would have the usual disadvantages of this type of connecting member
Helmet-style PAPRs avoid these disadvantages by being a single, self-contained unit, but the weight of the filter unit can be uncomfortable, especially when worn for extended periods of time

Method used

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  • Helmet-mounted respirator apparatus with a dual plenum system
  • Helmet-mounted respirator apparatus with a dual plenum system

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Embodiment Construction

[0011] The present invention provides powered portable air filtration devices for helmet mounted powered air purifying respirators or PAPRs. The helmet-mounted PAPR is designed to be worn by a user, supplying purified air to the user. Air filtration devices are typically used in environments where the ambient air contains or may potentially contain pollutants. Such pollutants include, for example, smoke, gas, particulate matter, vapor, etc., which may be present alone or in combination.

[0012] While conventional helmet-mounted PAPRs have many desirable features, these PAPRs suffer from the increased size and weight of the helmet, making the PAPR uncomfortable and bulky for the user. Additionally, depending on where the components of the helmet-mounted PAPR are positioned within the helmet, conventional helmets can be unbalanced, i.e., have more weight at certain points, which can cause the helmet to become improperly positioned, or cause the user's Tired neck and / or back. ...

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Abstract

Powered air respirators include a helmet, a filtering assembly within the helmet, and a face shield assembly pivotably attached to and depending from the front of the helmet and in fluid communication with the filtering assembly by a filtered-air passageway. The filtering assembly includes a blower assembly including an filtered-air outlet and an inlet, the filtered-air outlet being in fluid communication with the filtered-air passageway, a filtered-air plenum chamber in fluid communication with the inlet of the blower assembly, a filter member adjacent to, and in fluid communication with the filtered-air plenum chamber, and a contaminated-air plenum chamber adjacent to, and in fluid communication with the filter member and in fluid communication with a contaminated-air inlet.

Description

technical field [0001] The present invention relates to powered air filtration devices and, in particular, to helmet mounted respirator devices. Background technique [0002] Air supplied respirators are often worn in environments where the ambient air contains or may contain contaminants. Clean air delivered to the wearer comes from a supply container or a powered air source that directs or drives ambient air through the air filter. [0003] Systems that use a powered air source to supply clean air to the wearer are known as powered air-purifying respirators, or "PAPRs." PAPRs can be formed in various types, but two general types are belt back PAPRs and helmet PAPRs. A belt pack PAPR typically has two main components: a mask and a filter element. The mask is worn over at least the user's nose and mouth (the mask may also cover the eyes and ears) and the filter unit is worn around the user's waist. Typically, a hose connects the filter unit to the mask. A helmet-mounted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62B18/04A62B23/02A62B7/10A62B18/08
CPCA62B7/10A62B18/045Y10T29/49826A62B18/04A62B18/08A62B23/02
Inventor 戴维·L·奥森
Owner 3M INNOVATIVE PROPERTIES CO
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