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：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.