Apparel – Guard or protector – For wearer's head
Patent
1998-03-10
2000-03-14
Oleksa, Diana
Apparel
Guard or protector
For wearer's head
A42B 318
Patent
active
060354518
ABSTRACT:
A jaw piece is attachable to a base edge of the helmet. The jaw piece and a portion of the base edge of the helmet define a user viewing window. A first face shield is pivotable between an open position and a closed position extending across the viewing window. A seal is provided to engage with a perimeter of the viewing window when the first face shield is in the closed position. The attaching assembly for attaching the first face shield comprises a helmet cam having first helmet cam surfaces configured to releasably attach the first face shield to the protective helmet system and second helmet cam surfaces configured to releasably attach a second face shield to the protective helmet. The attaching assembly generates a first biasing force to bias the seal toward the perimeter of the viewing window when the first face shield is in the closed position and a second biasing force to bias the first face shield away from the jaw piece when in the open position.
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Product information: 3M Positive Pressure Respirators, 3M Occupational Health and Environmental Safety Division, Dec., 1996.
Standard: "American National Standard Practice for Occupational and Educational Eye and Face Protection," American National Standards Institute, Inc., (Approved Feb. 2, 1989).
Brochure: "Powered Respirators," Racal Health & Safety, (undated).
Burns James A.
Fabin Frank J.
Foslien Floyd L.
Mittelstadt William A.
Minnesota Mining and Manufacturing Company
Oleksa Diana
Rogers James A.
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