3m Innovative Properties Company

Richard D Williams

Garry J Walker

Mark A J Fernandes

Desmond T Curran

Peter D Lee

Derek S Baker

Peter N Yates

Mark AJ Fernandes

A respirator system is disclosed that includes a foldable head cover assembly including a face seal portion. The respirator assembly further includes a visor assembly attached to the head cover assembly and a head suspension system removably attached to the visor assembly. The visor assembly and the head cover assembly on one hand, and the suspension system on the other, are separable and foldable to enable storing and/or shipping the same separately. A head suspension system is also disclosed.

Respirator system including removable head suspension

A supplied air helmetcomprises a visorand a face sealthat is secured to the visor. The face sealincludes a sealing memberand a frame memberThe sealing memberextends radially inward from the frame memberand has first and second regions of permeabilityandThe second regionhas greater permeability than the first regionThe use of a face sealthat has differentiated permeability allows for a controlled flow of air through the interior of the supplied air helmet

Supplied air helmet having face seal with differentiated permeability

Growing community of inventors

Halton-on-Lune, United Kingdom

Richard D Williams