Gas mask accessory - has valve shutting off connection from inside to outside and allowing food supply
BE905394A
Gas mask with panoramic visor - has straight central visor section with side sections curving to rear
BE904392A
Gas mask
BE903622A
Absorbent element to remove e.g. toxic chemical liq. contamination - has activated charcoal-based layer pref. on hydrophilic base possibly on plastic mitten foldable inside out for safe disposal after use
EP0146161A2
Adjustable hose connection valve for breathing-air supply
BE898263R
Breathing apparatus with filter and air connection - has valve opened by inserting filter and member rotatable to vary area of axial flow
BE897626A
Ventilation opening for bomb shelter - has vertically spaced hinged louvres closed by pressure shock wave from outside
BE895415A
Breathing mask air filter valve - couplable to air line then opening valve to increase filter life when mask user stationary
BE894319R
Breathing-out valve for breathing apparatus - has seat closed by diaphragm loaded via disc by spring fixed to pillar on rear of diaphragm
BE882353A
Apparatus for checking muscular operations
BE880411A
Pre-loaded exhaust valve for compressed air devices
