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Air filtration and control system including head gear

  • US 5,711,033 A
  • Filed: 10/05/1995
  • Issued: 01/27/1998
  • Est. Priority Date: 10/05/1995
  • Status: Expired due to Fees
First Claim
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1. An air flow filtration system comprising,a headgear structure adapted to be mounted on the head of a wearer,liner means adapted to be mounted within said headgear structure to form a channel between said liner means and said headgear structure,a shroud which is selectively mounted on said headgear structure,a transparent shield mounted to said shroud,fan means mounted at said headgear structure adjacent to said liner means to create fluid flow through said channel,said fan means comprises a volute body,impeller means rotatably mounted within said volute body, andmotor means mounted within said impeller means in order to cause said impeller means to rotate relative to said volute body,housing means for supporting said fan means,at least one of said liner means and said fan means is removably attachable to said headgear structure, andfilter means in said shroud whereby fluid flow created by said fan means is filtered through said filter means.

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