公开(公告)号：US12208291B2

公开(公告)日：2025-01-28

申请号：US17309368

申请日：2019-12-05

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Keith K. Mclaughlin ,  Douglas D. Jensen

IPC: A62B18/08 ,  A62B18/02 ,  A62B18/04 ,  G01R33/02

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

公开(公告)号：US20240170741A1

公开(公告)日：2024-05-23

申请号：US18511150

申请日：2023-11-16

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Douglas D. Jensen ,  James F. Poch

IPC: H01M10/42 ,  A62B9/00 ,  H01M50/574

CPC classification number: H01M10/4264 ,  A62B9/00 ,  H01M50/574 ,  H01M2200/00 ,  H01M2220/30

Abstract: A first device includes an outrush circuit including a resistor electrically disposed in series with first and second terminals of the first device and a switch electrically disposed in parallel with the resistor. The switch is controlled by an external signal received by the first device from a second device when the first device is communicably connected to the second device and the second device is electrically connected to the first and second terminals. When the first device receives the external signal, the switch is switched on after a startup time from receiving the external signal, such that electric current from a power source substantially passes through the switch. When the first device does not receive the external signal, the switch is switched off, such that electric current from the power source substantially passes through the resistor. The resistor limits electric current to the second device.

公开(公告)号：US20230285778A1

公开(公告)日：2023-09-14

申请号：US18309211

申请日：2023-04-28

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Keith K. Mclaughlin ,  Douglas D. Jensen ,  Sean R. Kilmer ,  Andrew Murphy

IPC: A62B7/10 ,  A62B18/00 ,  A62B18/04 ,  H01M10/48 ,  F16K31/02 ,  A62B7/00 ,  H01M10/42

CPC classification number: A62B7/10 ,  A62B18/006 ,  A62B18/045 ,  H01M10/482 ,  F16K31/02 ,  A62B7/00 ,  H01M10/425 ,  H01M2220/10 ,  H01M2010/4271 ,  H01M2220/30

Abstract: 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.

公开(公告)号：US20220355132A1

公开(公告)日：2022-11-10

申请号：US17811390

申请日：2022-07-08

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Sean R. Kilmer ,  Douglas D. Jensen ,  Keith K. Mclaughlin ,  Andrew Murphy

IPC: A62B18/00 ,  A62B18/04 ,  A62B7/10 ,  A62B25/00 ,  F04D25/06 ,  F04D27/00 ,  H02P6/06

Abstract: 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 variable speed electric motor, the 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) monitoring system loading; and (b) decreasing a speed of the electric motor when system loading reaches a predetermined value. There is also provided an air purifying respirator blower system using such a method.

公开(公告)号：US20250108240A1

公开(公告)日：2025-04-03

申请号：US18832972

申请日：2023-01-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： James F. Poch ,  Kevin W. Eberman ,  Douglas D. Jensen

IPC: A62B18/08 ,  A62B18/00 ,  B01D46/00 ,  B01D46/46 ,  H01M10/44 ,  H01M10/613 ,  H01M10/623 ,  H01M10/63 ,  H01M10/653 ,  H01M10/6563 ,  H02J7/00

Abstract: An article of personal protective equipment (PPE) includes a battery, a charging circuit, and a controller. The battery is configured to power one or more components of the article of PPE. The charging circuit is configured to receive electrical power from a power supply and supply an electric current to the battery. The controller is configured to determine a plurality of thresholds of one or more electrical parameters of the battery. The plurality of thresholds has progressively increasing values. The controller is further configured to determine the one or more electrical parameters of the battery and control the charging circuit to progressively decrease a magnitude of the electric current supplied to the battery when the one or more electrical parameters progressively increase above each threshold from the plurality of thresholds.

公开(公告)号：US12017098B2

公开(公告)日：2024-06-25

申请号：US18309211

申请日：2023-04-28

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Keith K. Mclaughlin ,  Douglas D. Jensen ,  Sean R. Kilmer ,  Andrew Murphy

IPC: A62B7/10 ,  A62B7/00 ,  A62B18/00 ,  A62B18/04 ,  F16K31/02 ,  H01M10/42 ,  H01M10/48

CPC classification number: A62B7/10 ,  A62B7/00 ,  A62B18/006 ,  A62B18/045 ,  F16K31/02 ,  H01M10/425 ,  H01M10/482 ,  H01M2010/4271 ,  H01M2220/10 ,  H01M2220/30

Abstract: 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.

公开(公告)号：US20230414975A1

公开(公告)日：2023-12-28

申请号：US18252952

申请日：2021-11-10

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kenneth J. Krepel ,  Douglas D. Jensen ,  James F. Poch ,  Dale M. Bissen ,  Michael L. Parham

IPC: A62B18/00 ,  A62B18/02 ,  A62B18/04 ,  A62B18/08

CPC classification number: A62B18/006 ,  A62B18/02 ,  A62B18/04 ,  A62B18/08

Abstract: A blower/filtration unit for a powered air purifying respirator (PAPR) is presented that includes a motor configured to operate in a standard mode and in a high magnetic field (HMF) mode. The unit also includes a magnetic field sensor. The unit also includes a controller comprising a control mode switching function. The controller executes the control function upon detection of a magnetic field strength that exceeds a reference threshold magnetic field strength. The control function switches the motor operation from the standard mode to the HMF mode.

公开(公告)号：US11278749B2

公开(公告)日：2022-03-22

申请号：US16092488

申请日：2017-04-11

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Keith K. Mclaughlin ,  Douglas D. Jensen ,  Sean R. Kilmer ,  Andrew Murphy

IPC: A62B7/10 ,  A62B18/00 ,  A62B18/04 ,  H01M10/48 ,  F16K31/02 ,  H01M10/42

Abstract: 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.

公开(公告)号：US20230414976A1

公开(公告)日：2023-12-28

申请号：US18252971

申请日：2021-11-10

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Douglas D. Jensen ,  Kenneth J. Krepel ,  James F. Poch ,  Dale M. Bissen ,  Michael L. Parham ,  Paul A. Martinson

IPC: A62B18/04 ,  A62B18/08

CPC classification number: A62B18/045 ,  A62B18/08

Abstract: A blower/filtration unit for a powered air purifying respirator (PAPR) includes a motor configured to operate according to a motor control algorithm. The blower/filtration unit also includes a first pressure sensor positioned at an inlet of the blower/filtration unit. The blower/filtration unit also includes a second pressure sensor positioned at an outlet of the blower/filtration unit. The blower/filtration unit also includes a motor controller that executes the motor control algorithm. The motor control algorithm determines a motor speed required to maintain an airflow rate based on signals from the first and second pressure sensors.

公开(公告)号：US20230321464A1

公开(公告)日：2023-10-12

申请号：US18042790

申请日：2021-08-27

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Michael L. Parham ,  Douglas D. Jensen ,  Kenneth J. Krepel ,  Erik J. Hatinen ,  Kevin W. Eberman ,  Steven T. Awiszus ,  Dean J. Mitchell ,  Chris Ellerby

IPC: A62B18/00

CPC classification number: A62B18/006

Abstract: A breathing apparatus includes a blower unit including a blower. The breathing apparatus further includes a battery pack including at least one electrochemical cell. The breathing apparatus further includes an adaptor including an adaptor housing physically connected to the blower unit and the battery pack. The adaptor further includes electrical contacts that engages with corresponding electrical terminals of the blower unit and the battery pack, such that the blower is electrically coupled to the electrochemical cell. The adaptor further includes at least one communication interface for receiving data from at least one of the blower unit and the battery pack, and transmitting data to an external device.