US 6,550,479 B1Granted

Personal respirator

OwnerJames Neil Duxburyinventor

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Abstract

A respiratory protection air-purifying device that minimizes the area required in front of the face, especially around the mouth area, by locating the heavier filter cartridge behind the head, resting on the lower neck and shoulders, connected by two filtered air tubes around the head and neck partially counter-balancing the valve chamber directly in front of the mouthpiece, forming a ring around the head with the mouthpiece in the mouth and the exhaust port in the bottom of the valve chamber. The valve chamber has the filtered air intake check type valves opposite each other horizontally, an exhaust check type valve down with short exhaust tube and an oval mouthpiece tube passing through the mouthpiece, into the mouth. The respirator is worn around the head and neck with the filter resting on the lower neck and shoulders, the mouthpiece inserted in the mouth.

Claims7

Dependent claims

A personal respiratory protection device, comprising

(a). a mouth piece providing a means to support, center and secure in a wearer's mouth, an oval breathing tube;
(b). a valve chamber having an extension through the mouthpiece, two horizontal openings opposed to each other, one left and one right, for filtered air to enter when inhaling and a downward facing opening with a check valve to let exhaled air exhaust out;
(c). a short exhaust tube directed downward from the check valve and chamber;
(d). a pair of detachable coupling sleeve connectors with check valves on each filtered air opening, one left and one right, at the valve chamber;
(e). a pair of tubes adapted for extending around the wearer's head and neck, one on the left side and one on the right side, directing filtered air to the check valves;
(f). a “T” connection adapted to be located behind the wearer's head, connecting the pair of tubes together with an opening at 90 degrees;
(g). a filter socket with an outlet opening attached to the opening of the “T” connection and an inlet threaded with a gasket to accept a threaded filter cartridge.

4 more elements

Dependencies are inferred from the claim text.