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Supplied air helmet having a knitted face seal

A sealing device and helmet technology, applied in helmets, helmet covers, breathing masks, etc., can solve problems such as danger, and achieve the effect of increasing possibility, improving comfort and fit, and protecting health

Inactive Publication Date: 2007-10-17
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not using a face seal is dangerous to the wearer as contaminants can more easily enter the breathing zone

Method used

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  • Supplied air helmet having a knitted face seal
  • Supplied air helmet having a knitted face seal
  • Supplied air helmet having a knitted face seal

Examples

Experimental program
Comparison scheme
Effect test

example

[0067] The face seal seal is made from a straight 1&1 rib weave stock that is cut and sewn to obtain the desired shape and configuration. The blank is made from three yarns: a combined flame retardant / comfort yarn, an elastic yarn, and a water soluble yarn. Combined FR / Comfort Yarn Contains Kanecaron TM fiber, Prot ex-M, and cotton fiber. With respect to each other, the use of Kanecaron TM The weight percentage of fiber is 55%, and the weight percentage of cotton fiber is 45%. The elastic yarn is 200 dtex and contains 62% by weight of the elastic fabric Lycra TM and 38% crimped nylon. In woven blanks, these two yarns are used as the main structural elements. The combined flame retardant / cotton yarn and elastic yarn are both dyed blue. The flame retardant / comfort yarns are also waxed. The amount of elastic yarn in the blank varied along the length of the blank, with the amount of yarn being highest in the center of the blank and decreasing to no elastic yarn at the top a...

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PUM

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Abstract

A supplied air helmet 10 that has a visor 14 and a face seal 16. The face seal 16 is secured to the visor 14 and includes a sealing member 18 that comprises a knitted fabric. The knitted fabric is disposed on the face seal 16 in a location where the face seal 16 makes contact with a wearer's face. The use of a knitted fabric for the face seal 16 makes the supplied air helmet 10 more comfortable to wear and makes it more likely that helmet wearers will consistently use the face seal 16 while donning the supplied air helmet 10.

Description

technical field [0001] The present invention relates to the use of knitted face seals on supplied air helmets. Background technique [0002] Supplied air helmets are often worn in environments where the ambient air contains pollutants. These helmets have a fluid-tight visor that sits in front of the wearer's face when the helmet is on. The visor has windows through which the wearer can see the surrounding environment. A face seal is attached to the visor to provide a breathing zone or interior gas space separate from the surrounding exterior gas space. An interior gas space is located between the visor and the wearer's face and is typically defined by a face seal attached to the visor, the visor body and the wearer's face. US Patents 6,014,971, 4,462,399 and 4,280,491 disclose examples of supplied air helmets with face seals. [0003] Clean air is forced into the interior gas space from an air supply tank or a powered air system that forces ambient air through the air fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62B18/04
CPCA62B18/04A61F9/045A61F9/068A42B3/288
Inventor 德斯蒙德·T·柯伦彼得·D·李理查德·D·威廉姆斯彼得·N·耶茨
Owner 3M INNOVATIVE PROPERTIES CO
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