US 11,883,693 B2 · Modular, integrated powered air purifying respirator system

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.

Claims18

Dependent claims

A powered air purifying respirator (“PAPA”) assembly, comprising:

a blower unit having an air inlet and an air outlet configured for removable connection to a hose system for delivery of cleaned air to a user;
a filter rail chassis having a first closed end and a second open end and removably attached to said air inlet of said blower unit at said second open end of said filter rail chassis, said filter rail chassis having at least one chassis inlet configured to removably and sealingly receive a filter canister;
and
a portable power assembly removably attached to said blower unit, said portable power assembly having a bottom face that is aligned with a bottom face of the blower unit, said portable power assembly extending distally from a front face of the blower unit to a point adjacent to a portion of the filter rail chassis, and said portable power assembly having a top face at least a portion of which is positioned lower than a top of said at least one chassis inlet.

1 more element

A powered air purifying respirator (“PAPR”) assembly, comprising:

a blower unit having an air inlet and an air outlet configured for removable connection to a hose system for delivery of cleaned air to a user;
a filter rail chassis having a first closed end and a second open end and removably attached to said air inlet of said blower unit at said second open end of said filter rail chassis, said filter rail chassis having at least one chassis inlet configured to removably and sealingly receive a filter canister;
and
a portable power assembly removably attached to said blower unit;
wherein said hose system is configured for delivery of cleaned air to a user, said hose system having a hose inlet removably attached to said air outlet of said blower unit and a hose outlet configured for attachment to a user's safety mask, said hose system further comprising:
two circular cross-section air carrying conduits extending between said hose inlet and said hose outlet;
and
an oval shaped outer tube extending between said hose inlet and said hose outlet and enclosing said two circular cross-section air carrying conduits.

5 more elements

Dependencies are inferred from the claim text.

Modular, integrated powered air purifying respirator system

Life of this patent

Modular, integrated powered air purifying respirator system

Life of this patent

Abstract

Claims18