0164946-A2 is referenced by 46 patents and cites 7 patents.

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 module is designed to be mounted directly on an air purifying respirator facepiece (1) for powering the respirator, the module (14) being intended either to be interposed between the respirator facepiece (1) and a filter canister (32), which may otherwise be connected to the respirator, or to be connected to the inlet of the filter canister (32).; The fan (22) may be either an axial fan or a centrifugal fan, and the fan and motor may be arranged relative to the housing inlet (16) and outlet (17) so asto minimise the extent to which the module projects from the facepiece and/or so that the motor will at least in part counterbalance the weight of the filter canister (32) about the axis of the pump module housing outlet (17).

Title
Improvements in and relating to respirators.
Application Number
EP19850303668 19850523
Publication Number
0164946 (A2)
Application Date
May 23, 1985
Publication Date
December 18, 1985
Inventor
Odell Raymond
GB
Hilton Joseph Raymond
GB
Assignee
Racal Safety
GB
IPC
A62B 18/00
A62B 07/00
A62B 18/00
A62B 18/00
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