3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

Desmond T Curran

Christopher P Henderson

John W Bryant

James F Dyrud

Andrew Murphy

Dennis L Krueger

Elfed I Williams

Graham J Bostock

Peter D Lee

Garry J Walker

Daniel Martin

Mark A J Fernandes

John M Facer

Stuart J King

Michael C Bainton

Thomas I Insley

David S Taylor

Harold J Seppala

James J May

Derek A Parkin

Nicholas J Gloag

Brian Cormack

Peter S Leonard

Alan W Lee

Donald L Pochardt

John W Louks

Andrew S Viner

Audra A Wilson

Jason A Graves

Raymond Odell

Martin J Avery

Bengt Kallman

Simon A Mortimer

Daniel P C Tyce

Rachael J Johnson

Malcolm R Watson

Oskar E Juhlin

Martin L E Birath

Reyad A Abdulqader

Audra A Conlan

Bengt Garbergs

Derek S Baker

Benjamin H Cooper

Sabeel Ullah

Richard D Williams

Christopher N Findlay

Scott R Alexander

John A Duff

Peter B Allen

Jazini Dorcheh

Peter N Yates

T Mick Sayers

Vladimir Dubrovskii

Terence M Sayers

Paul Hind

Mark AJ Fernandes

A respirator has a shell that defines a breathable air zone for a user wearing the respirator. An air flow control system for the respirator has an air delivery conduit within the shell of the respirator, a valve member moveable relative to the air delivery conduit and within the shell to vary the amount of air flow through the air delivery conduit, and a valve actuator outside of the shell of the respirator. The valve actuator is manipulatable by a user of the respirator while wearing the respirator to control movement of the valve member.

Respirator flow control apparatus and method

A maintenance-free respiratorthat includes a mask harness and a mask body. The mask bodyhas at least one layer of filter mediaand has a perimeterthat includes an upper segment. The upper segmentincludes first and second concave segmentsthat are located, respectively, on first and second sides of a central plane, when viewing the mask body from a top view. A maintenance-free respiratorof this configuration is comfortable to wear and can provide a snug fit to a wearer's face, particularly beneath each of the wearer's eyes, while at the same time having an ability to improve compatibility with various protective eyewear.

Maintenance-free respirator that has concave portions on opposing sides of mask top section

An exhaust valve shroud for a personal protection respiratory device, the shroud comprising a main body defining an inlet for receiving exhaled air from an exhalation valve, an outlet for emitting exhaled air from the shroud, and a perimeter flow conduit for carrying the exhaled air from the inlet to the outlet, wherein the perimeter flow conduit includes a bifurcated transition section which receives air from the inlet in a substantially forward facing direction and directs the air into first and second substantially downwardly extending flow passages, each of which passages are in communication with the outlet.

Exhaust valve shroud for a personal protection respiratory device

A maintenance-free respiratorthat includes a mask harness and a mask bodyThe mask bodyhas at least one layer of filter mediaand has a perimeterthat includes an upper segmentThe upper segmentincludes first and second concave segmentsthat are located, respectively, on first and second sides of a central planewhen viewing the mask body from a top view. A maintenance-free respiratorof this configuration is comfortable to wear and can provide a snug fit to a wearer's face, particularly beneath each of the wearer's eyes, while at the same time having an ability to improve compatibility with various protective eyewear.

A powered air purifying respirator (PAPR) for delivering a forced flow of filtered air to a wearer is disclosed. The PAPR comprises a turbo unit with turbo unit components including a fan, an electric motor, and an electronic control unit having a wireless electronic control transceiver, the fan being driven by the electric motor under the control of the electronic control unit and the electronic control unit being configured to send and receive information via the electronic control transceiver; a turbo unit power source that provides power to the turbo unit components; a turbo remote control unit having a wireless turbo remote control transceiver; at least one turbo status indicator unit, adapted to indicate a current operating status of the turbo unit and/or turbo unit components, having a wireless turbo status transceiver; wherein at least one of the turbo remote control unit and turbo status indicator unit is remote from the turbo unit, and wherein at least two of the electronic control transceiver, the turbo remote control transceiver and the turbo status transceiver are in wireless communication with each other.

Powered air-purifying respirator

A respirator assembly has a shell that defines a breathable air space for a user wearing the respirator assembly. The respirator assembly has an air delivery conduit within the shell for providing air to the breathable air space. The air delivery conduit has an air outlet that is either adjustable in configuration or has a vane associated therewith that is adjustable in position so that the direction of the air exiting the air outlet is controllable between first and second air flow directions. The user is able to control the direction of air exiting the air outlet while the respirator assembly is worn by the user.

Respirator assembly with air flow direction control

An air flow control system for a respirator () is described which includes a shell that defines a breathable air zone for a user () wearing the respirator (), an air delivery conduit () within the shell of the respirator, and a valve member () moveable relative to the air delivery conduit and within the shell to vary the air flow through the air delivery conduit. The air flow control system also includes an outer device () outside of the shell of the respirator that is rotatable by a user () of the respirator while wearing the respirator to control movement of the valve member.

Powered air purifying respirator unit cover

A method of controlling a powered air purifying respirator blower system to deliver a substantially uniform volumetric airflow to a user includes the steps of determining one of (a) ambient air density or (b) ambient air temperature and ambient air pressure, and adjusting an electrical characteristic of the electric motor in response to the determination and the at least two calibration values. The powered air purifying respirator blower system may include a fan powered by an electric motor, the motor being controlled by an electronic control unit for delivering a forced flow of filtered air to a user. In some embodiments, the electronic control unit may be operable to adjust an electrical characteristic of the motor in accordance with a predetermined correlation between the speed of the fan and the applied motor electrical characteristic for a selected substantially uniform volumetric airflow from the fan.

Method of controlling a powered air purifying respirator

A respirator assembly has a respirator hood having a front side that includes a visor and a back side that includes an air inlet opening. The respirator assembly also has a shape stable manifold having an air inlet conduit extending through the air inlet opening of the hood and having, within the hood, a plurality of air delivery conduits in fluid communication with the air inlet conduit.

Air delivery apparatus for respirator hood

Respiratory mask

A personal respiratory protection device that comprises a multilayer body including a stiffening layer, filter media layer(s) and inner or outer cover layer(s). The mask body includes a central portion between first and second portions, the central portion being defined by a fold, bond, weld, seam, or combination thereof and having a width of about 160 to 220 mm and a height of about 30 to 110 mm. The device is capable of being folded flat for storage with the first portion in at least partial face-to-face contact with a surface of the central portion and the second portion contacting a surface of the first portion. When unfolded for use the device is capable of forming a cup-shaped off the face air chamber over the nose and mouth of a wearer.

Flat-folded personal respiratory protection devices and processes for preparing same

Growing community of inventors

Durham, United Kingdom

Desmond T Curran