Respiratory protective device

A - Human Necessities – 62 – B

Patent

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Details

A62B 7/10 (2006.01) A62B 18/00 (2006.01)

Patent

CA 2121157

There is disclosed a respiratory protective device, and a related powered filtering device. Known devices, suffer from a number of problems, such as liability to failure, overworking and lack of fault indication. Accordingly, one aspect of the present invention provides a respiratory protective device (5) providing a powered filtering device (10) comprising a housing (15) having at least one inlet (20) and an outlet (25), pump means (35) being provided between the at least one inlet and the outlet for pumping air therebetween, a filter(s) being provided in association with the inlet(s) and/or outlet, the outlet being connected to a first end (94) of a breathing hose (95) , the second end (96) of the breathing hose being connected to a facepiece (100), the powered filtering device further comprising means (110) for controlling the pump means provided at or near the outlet of the housing for controlling air flow between the inlet (B) and the outlet(s) in response to a wearers breathing pattern.

La présente invention vise un appareil de protection respiratoire et un dispositif de filtration mécanique connexe. Les appareils courants présentent un certain nombre de problèmes, notamment des risques de défaillance et d'utilisation excessive et un défaut d'indication des défaillances. Selon la présente invention, l'appareil de protection respiratoire (5) est doté d'un dispositif de filtration mécanique (10) constitué d'une enveloppe (15) comportant au moins une entrée (20) et une sortie (25), une pompe (35) montée entre l'entrée et la sortie et destinée à pomper de l'air entre ces deux orifices, un ou plusieurs filtres à l'entrée et/ou à la sortie, la sortie étant raccordée à une des extrémités (94) d'un tuyau respiratoire (45), la deuxième extrémité de ce dernier étant raccordée au masque (100), et un dispositif de commande (110) de la pompe, placé à ou près de la sortie de l'enveloppe et permettant de réguler le débit d'air entre l'entrée et la sortie en fonction du profil respiratoire de l'utilisateur.

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