3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

Imation Corporation

Keith K Mclaughlin

Douglas D Jensen

Andrew Murphy

Sean R Kilmer

Ronald A Hagen

Joseph Andrew Hoffman

John E Potts

James E Steffen

Ranjith Divigalpitiya

Anthony B Ferguson

Kenneth J Krepel

Owen L Nelson

William B Robbins

Wayne M Wirth

Earl L Cook

Bimsara W Disanayaka

Walter S Federation

Daniel J Severson

The present invention relates to powered air purifying respirators (PAPRs) and methods to overcome issues associated with their use in high magnetic field environments.

Method and apparatus for maintaining airflow in a powered air purifying respirator in high magnetic fields

A method of controlling a blower system of a powered air purifying respirator to deliver a substantially uniform volumetric airflow to a user, the system including a fan powered by a variable speed electric motor, the motor controlled by an electronic control unit for delivering a forced flow of air through at least one filter to a user. There is also provided an air purifying respirator blower system using such a method.

Method of controlling a powered air purifying respirator

There is provided a method of controlling a powered air purifying respirator blower system to deliver a substantially uniform volumetric airflow to a user, the system comprising a fan powered by a battery in communication with a variable speed electric motor, the variable speed electric motor is controlled by an electronic control unit for delivering a forced flow of air through at least one filter to a user, comprising the steps of: (a) determining an estimated system run time by summing a battery run time remaining and a system run time; and (b) altering a speed of the variable speed electric motor when the estimated system run time is equal to or less than a desired system run time.

Methods and systems for controlling a powered air purifying respirator blower system where volumetric airflow is stepped down into predetermined discrete ranges based on system loading and desired runtime.

A radial fan assembly for use in a powered air purifying respirator includes at least an impeller, a printed circuit board and a scroll casing. The scroll casing has a first and a second scroll casing element. The second scroll casing element includes at least a portion of the printed circuit board. When the radial fan assembly is used in a powered air purifying respirators, the respirator may also include components such as a filter assembly.

Compact scroll fan assembly

A cassette for use in an electronic radiographic imaging system having electronic components. The cassette includes a positioned photoreceptive medium, a light-tight frame, at least one power storage device, and an electronic interface structure for connection to electronic components within the radiographic imaging system. The cassette can also include an electrical interface structure for connection to a power source within the radiographic imaging system.

Cassette for use in an electronic radiographic imaging system

Detector plate for use in imaging systems

Growing community of inventors

Eagan, MN, United States of America

Keith K Mclaughlin