1
Hilton Joseph Raymond: Improvements in and relating to power assisted air-purifying respirators.. Racal Safety, December 8, 1982: EP0066451-A1 (61 worldwide citation)

The device comprises an expandable chamber (13) having an outlet (23) for connection to a facepiece, for example a face mask (26) and an inlet (12) connected to pump means (2, 3, 4, 5) for drawing ambient air into the device through a filter (8) and pumping it into the chamber. In use the wearer of ...


2
Hilton Joseph Raymond, Odell Raymond: Improvements in and relating to respirators.. Racal Safety, December 18, 1985: EP0164946-A2 (46 worldwide citation)

The present invention relates to a pump module (14) for a powered air purifying respirator assembly including a facepiece (1) and a filter canister (32). The pump module (14) comprises a housing (15) having an air inlet (16) and an air outlet (17) and containing a fan (22) and motor (24). The pump m ...


3
Hilton Joseph Raymond, Rabin Paul Robert: Improvements in and relating to breathing apparatus.. Racal Safety, October 14, 1987: EP0241188-A1 (11 worldwide citation)

Breathing apparatus for use in contaminated atmospheres and for ensuring the maintenance of a positive pressure over the face of the wearer at all times, comprises a face mask (1) for covering at least the nose and mouth of the wearer and having an inlet (2) and an outlet (3). The outlet (3) is prov ...


4
Hilton Joseph Raymond: Masque respiratoire perfectionne du type filtrant. Racal Safety, December 19, 1980: FR2457107-A1 (3 worldwide citation)

L'INVENTION CONCERNE LES MASQUES RESPIRATOIRES ET, PLUS PARTICULIEREMENT, LES MASQUES FACIAUX FILTRANTS.


5
Hilton Joseph Raymond, Wood John David: Respirators. Racal Safety, January 8, 1982: FR2485931-A1

The present invention relates to a filtering facepiece made from flexible filtering sheet material. The facepiece is made from a flat pocket 100 of filtering sheet material having opposed side walls 105 and 106, a generally tapering shape with an open end 104 at the larger end and a closed end 101 a ...


6
Hilton Joseph Raymond: Respirators. Racal Safety, January 8, 1982: FR2485932-A2

The present invention relates to a respirator of the type called a filtering facepiece which is made from a flat pocket of flexible filtering sheet material having a generally tapering shape with an open edge at the larger end of the pocket and a closed end at the smaller end of the pocket. The clos ...