1
Cappa Giulio, Moscatelli Romano: Device for replacing the filter of a gas mask in polluted atmosphere without any contamination risk.. Pirelli, Mini Difesa, April 12, 1989: EP0310970-A1 (7 worldwide citation)

Device for preventing the inflow of air into a gas mask during the substitution of its filter (1) in the presence of contaminated atmosphere. The device comprises a small plate (12) having a central stem (13) which passes through the support (9) of a check valve admitting air to the respiratory trac ...


2
Cappa Giulio, Moscatelli Romano, La Torre Paolo: Gas mask for operation in contaminated areas.. Pirelli, Mini Difesa, August 30, 1989: EP0329941-A2 (6 worldwide citation)

In a gas mask (1) the facepiece (2) comprises a front portion of semi-rigid rubber highly resistant to chemical agents and a sealing skirting of soft rubber having a high mechanical resistance, co-vulcanized with said front portion. A nozzle (11), connected to a half mask (22) situated inside the fa ...