Abstract: A modular, low profile PAPR system includes a blower, a filter rail chassis removably attachable to an inlet of the blower, a hose system removably attachable to the outlet of the blower, and a removable battery pack. The hose system comprises an ovular outer tube that maintains a generally flat profile for the hose as it extends across or along the operator's body. Two circular air carrying conduits are sealed within such ovular outer tube against outside contamination and provide a flat, small profile tube system that resists hoop stress applied to the outside of the hose, provides low resistance against bending, that will not inadvertently kink or seal in low radius turns, and that results in a low profile, non-collapsing hose system for delivering air from a remotely carried blower and filter assembly to the operator's protective mask.

Abstract: Disclosed is a modular, adjustable, low profile PAPR system allowing customized configuration to meet an operator's weight and space requirements. The system includes a blower, a filter rail chassis that is removably attachable to an inlet of the blower, and a hose system that is removably attachable to the outlet of the blower. The blower unit is adjustable to enable a user or wearer to modify the position of the blower unit outlet, and thus the point of connection of the hose system, in order to allow the user or wearer to route the hose as may be most desirable for their then-current gear configuration, all while maintaining an air-tight airflow conduit extending from the filter rail chassis holding the filter cartridges through the PAPR to the outlet port, and ultimately into the hose system for delivery to the user's mask.

Abstract: Disclosed is a modular, low profile PAPR system allowing customized configuration to meet an operator's weight and space requirements. The system includes a blower, a filter rail chassis that is removably attachable to an inlet of the blower, and a hose system that is removably attachable to the outlet of the blower. A battery pack is attachable to the blower in a close, nested configuration abutting both the blower and the filter chassis to maintain the small profile of the system, and may alternatively be carried remote from the blower with a power cord interconnecting the blower with the battery pack. The hose system comprises an ovular outer tube, which ovular shape maintains a generally flat profile for the hose as it extends across or along the operator's body.