3m Innovative Properties Company

Gary E Dwyer

Pierre Legare

David M Blomberg

Nathan A Abel

Carl W Raines, Iii

William A Mittelstadt

Mark W Schulz

Michael J Cowell

Jennifer A Chaisson

Thomas I Insley

Neal A Rakow

Kiran S Kanukurthy

John M Pilgrim

James E Steffen

Thomas W Holmquist-Brown

Michael J Svendsen

David R Stein

Jamie V Blair

Kent E Lageson

John S Huberty

Dylan T Cosgrove

Chaodi Li

Charlie Wood

Mark F Schulz

David M Castiglione

Britton G Billingsley

Andrew Murphy

Serge Dubeau

Simon J Smith

Kevin A Frankel

Denise L Goddard

Carl W Iii Raines

A cartridge holder for a respirator, the cartridge holder including a fit-check device with a sealing platen that can be actuated between a first, unsealed position and a second, sealed position in which at least a portion of the sealing platen contacts a major surface of a disposable filter cartridge within the cartridge holder so as to prevent airflow through the disposable filter cartridge.

Filter cartridge holder with fit-check device

Respirator filter cartridge

A respiratory mask body defining a breathable air zone for a wearer and having a shut-off valve is provided. In an exemplary embodiment, the mask body includes one or more inlet ports configured to receive one or more breathing air source components. The shut-off valve is operable between a closed position and an open position, and when in a closed position the shut-off valve prevents fluid communication between the one or more inlet ports and the breathable air zone and the shut-off valve returns to an open position in the absence of an applied force.

Respirator negative pressure fit check devices and methods

A filter cartridge having a filter media with two opposing ends each being occluded by an adhesive edge seal.

Filter cartridge comprising filter media with adhesively edge-sealed ends, and method of making and using

Respirator filter

Air filtering devices are disclosed that contain a first filter cartridge having a cartridge inlet and a cartridge outlet and a curved filter bed having a concave surface disposed such that air to be filtered passes through the inlet, the curved filter bed, and the outlet. The air filtering devices also contain a blower assembly having a blower inlet in fluid communication with the cartridge outlet and a blower outlet, the blower assembly includes a motor proximate to the concave surface of the curved filter bed. The motor has a rotational axis such that the rotational axis is adjacent to the center of curvature of the curved filter bed. The air filtering device may be used in powered air purifying respirators.

Air filtration device

Respirator cartridge having an engagement latch

Filter cartridge

A respiratory mask body defining a first chamber and a second chamber is provided. In an exemplary embodiment, the mask body includes one or more inlet ports adapted to receive one or more breathing air source components in communication with the first chamber and a fluid intake communication component allows communication of air from the first chamber to the second chamber during inhalation by a wearer.

Respiratory mask having a clean air inlet chamber

A filter system includes a housing, a filter medium disposed within the housing, an optical analyte sensor, and an optical reader. The optical analyte sensor is characterized by a first region that exhibit a first response to an analyte of interest and a second region that exhibit a second, different, response to an analyte of interest. The optical analyte sensor includes a detection medium and is disposed within the housing such that the detection medium is in fluid communication with the filter medium. The optical reader includes at least one light source and at least one detector.

Filter systems including patterned optical analyte sensors and optical readers

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Mallorytown, Canada

Gary E Dwyer