3m Innovative Properties Company

Carl W Raines, Iii

David M Blomberg

William A Mittelstadt

Michael J Cowell

Nathan A Abel

Gary E Dwyer

Mark W Schulz

Charlie Wood

Thomas I Insley

Kent E Lageson

David R Stein

Michael J Svendsen

Dylan T Cosgrove

Chaodi Li

Oskar E Juhlin

Mark F Schulz

Thomas G Skulley

Pierre Legare

John S Huberty

Serge Dubeau

August H Michael

Fredrik Ericsson

Ayden Mert

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 respirator apparatus includes a respirator body, a filter cartridge receiver integral with and extending from the respirator body, and a filter cartridge. The filter cartridge includes a nozzle element being integral with the filter cartridge. The respirator body and filter cartridge are configured to be fluidically coupled through sleeve-fit engagement between the filter cartridge receiver and nozzle element and the filter cartridge receiver and nozzle element define an airflow channel.

Sleeve-fit respirator cartridge

Respirator mask

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

Respirator cartridge

Respirator mask exhalation port

Respirator mask body

Respirator mask having a communication grille

Respirator mask having a circular button

A harness assembly for a respiratory protection device is provided. In an exemplary embodiment, the harness assembly includes a strap support having an attachment point, a first strap having a first strap attachment element, and a second strap having a second strap attachment element, wherein the first strap attachment element is attachable to the second strap attachment element and attachable to the attachment point of the strap support, and the first and second straps are positionable between the first configuration in which the first strap attachment element is attached only to the second attachment element and a second configuration in which the first attachment element is attached to the second attachment element and the attachment point of the strap support.

Respiratory protection device harness assembly

Growing community of inventors

Woodbury, MN, United States of America

Carl W Raines, Iii