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Air filtration system including a helmet assembly

DC
  • US 6,622,311 B2
  • Filed: 07/02/2002
  • Issued: 09/23/2003
  • Est. Priority Date: 01/18/2000
  • Status: Expired due to Term
First Claim
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1. A helmet assembly of an air filtration system for mounting to a head of a user to minimize strain on the head and neck of the user, said assembly comprising:

  • a structural shell having a front section and a rear section;

    a rear support rigidly extending from said rear section of said structural shell, an adjustment segment disposed on said rear support and having first and second sides;

    a strap flexibly connected to and extending from said front section of said structural shell, said strap including a first end disposed within said first side of said adjustment segment, and a second end disposed within said second side of said adjustment segment; and

    an adjustment device mounted to said adjustment segment and engaging said first and second ends of said strap to manipulate said first and second ends toward each other to tighten said strap and to pull said strap from said front section as said rear support remains fixed relative to said rear section and said strap, and to manipulate said first and second ends away from each other to loosen said strap and to push said strap toward said front section as said rear support remains fixed relative to said rear section and said strap.

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