3m Innovative Properties Company

Eastman-kodak Company

Imation Corporation

Douglas D Jensen

Keith K Mclaughlin

Andrew Murphy

Sean R Kilmer

Robert W Spurr

Eric Julius Donaldson

Steven W Tanamachi

Timothy S Vraa

Leah C Featherstone

Terrence H Joyce

Richard R Lemberger

Bruce E Nelson

Yun Zhong Li

Terrance C Joyce

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.

Waste paper basket

Backboard attachment bracket

Laundry basket

Collapsible canvas laundry hamper

Wastebasket/clothes hamper

Combined wastebasket and clothes hamper

Sheet media package system includes a cartridge or other packaging for containing a plurality of sheet media; and a radio-frequency identification transponder which stores relevant digital data associated with the cartridge or other packaging.

Sheet media package having radio-frequency identification transponder

Growing community of inventors

Woodbury, MN, United States of America

Douglas D Jensen