公开(公告)号：US10948449B2

公开(公告)日：2021-03-16

申请号：US15685432

申请日：2017-08-24

Applicant: MSA TECHNOLOGY, LLC

Inventor： Brian Keith Davis ,  Michael Alvin Brown ,  Mark Flori Zanella, Sr.

IPC: G01N27/327 ,  G01N27/404 ,  G01N27/407

Abstract: An electrochemical gas sensor includes a sensor housing having a plurality of inlet passages, wherein each of the plurality of inlet passages has a cross-sectional area of no greater than 11,309 μm2. The electrochemical gas sensor further includes a working electrode within the housing which is responsive to an analyte gas and an electrolyte within the sensor housing in ionic contact with the working electrode.

公开(公告)号：US10900922B2

公开(公告)日：2021-01-26

申请号：US16037882

申请日：2018-07-17

Applicant: MSA TECHNOLOGY, LLC

Inventor： Michael Alvin Brown ,  Meghan E. Swanson ,  Mark Flori Zanella, Sr.

IPC: G01N27/16 ,  G01N25/30

Abstract: A system includes a primary combustible gas sensor and a trigger combustible gas sensor including a first trigger element of low-thermal-mass which includes a first trigger heating element in operative connection with electronic circuitry. The trigger combustible gas sensor also includes a second trigger element of low thermal mass including a second trigger heating element. The second trigger element is also in operative connection with the electronic circuitry. The electronic circuitry further has a first trigger mode of operating in which the first trigger element is heated to a temperature at or above a temperature at which the first trigger element causes combustion of the at least one combustible gas analyte and wherein the second trigger element is operated as a trigger compensating element. The electronic circuitry is configured to operate the trigger combustible gas sensor to detect a value of a response at or above a threshold value. The primary combustible gas sensor is activated from a low-power state upon the threshold value being detected by the trigger combustible gas sensor.

公开(公告)号：US10821310B2

公开(公告)日：2020-11-03

申请号：US15698385

申请日：2017-09-07

Applicant: MSA Technology, LLC

Inventor： Matthew Frederick Jacob

IPC: A62B35/00

Abstract: A wearable harness has a first strap overlapping a second strap, with each of the first strap and the second strap having a longitudinal axis extending in a direction of a major longitudinal length. The wearable harness further has a reinforced opening extending through each of the first strap and the second strap. The reinforced openings have a pivot axis extending in a direction substantially perpendicular to the longitudinal axis of each of the first strap and the second strap when the reinforced openings overlap each other. The first strap and the second strap are pivotally movable relative to one another about the pivot axis of the central openings.

公开(公告)号：US10705041B2

公开(公告)日：2020-07-07

申请号：US16354413

申请日：2019-03-15

Applicant: MSA TECHNOLOGY, LLC

Inventor： Meghan E. Swanson ,  Michael Alvin Brown

IPC: F01N11/00 ,  G01N27/16 ,  G01N31/10 ,  G01N31/12 ,  G01M15/10 ,  G01N27/407 ,  G01N25/20 ,  G01N25/48 ,  G01N27/12

Abstract: A combustible gas sensor including a first sensing element having a catalyst and a heating element and electronic circuitry in operative connection with the heating element of the first sensing element to change a temperature thereof between a temperature above a temperature to catalyze oxidative combustion and a temperature at which the catalyst is substantially inactive to catalyze oxidative combustion of a plurality of gas analytes of interest. The electronic circuitry being configured to determine a species of at least one of the plurality of gas analytes of interest from a first, dynamic output of the combustible gas sensor while the temperature of the first sensing element is changing. The electronic circuitry further being configured to determine a concentration of the species from a second output of the combustible gas sensor.

公开(公告)号：US20200170329A1

公开(公告)日：2020-06-04

申请号：US16207842

申请日：2018-12-03

Applicant: MSA Technology, LLC

Inventor： Alexa Danielle Bohn ,  Robert Edward Klotz ,  Daniel Martin Hehman

IPC: A42B3/18 ,  A42B3/16 ,  A42B3/04

Abstract: A protective helmet has an outer shell configured for surrounding a head of a user and at least one accessory attachment rail connected to the outer shell. The accessory attachment rail has a body having a front end, a rear end, and one or more slots between the front end and the rear end. Each of the one or more slots is configured for removably receiving at least one helmet accessory. A locking mechanism is associated with each of the one or more slots for automatically locking the at least one helmet accessory in the one or more slots upon insertion of the at least one helmet accessory within the one or more slots and for preventing removal of the at least one helmet accessory from the one or more slots. At least one connection element is provided for connecting the accessory attachment rail to the outer shell.

公开(公告)号：US20200008537A1

公开(公告)日：2020-01-09

申请号：US16453363

申请日：2019-06-26

Applicant: MSA Technology, LLC

Inventor： Benjamin T. Sepe ,  Matthew Frederick Jacob ,  Matthew Quigley

IPC: A44B11/25 ,  A62B35/04 ,  A62B35/00

Abstract: A connection arrangement for use with a wearable body harness has a first connector with a first fixed buckle configured to connect to a first portion of a first shoulder strap of the harness, and a first adjustable buckle configured to connect to a second portion of the first shoulder strap. The connection arrangement further has a second connector removably connectable to the first connector. The second connector has a second fixed buckle configured to connect to a first portion of a second shoulder strap of the harness, and a second adjustable buckle configured to connect to a second portion of the second shoulder strap. Each of the first adjustable buckle and the second adjustable buckle has an adjustment mechanism configured for adjusting a length of the second portion of the first and second shoulder straps by selective frictional engagement with the second portion of the first and second shoulder straps.

公开(公告)号：US20190313746A1

公开(公告)日：2019-10-17

申请号：US15952809

申请日：2018-04-13

Applicant: MSA Technology, LLC

Inventor： Mitchell H. Hetrich

IPC: A44B11/28 ,  A62B35/00 ,  A44B13/00 ,  A44B11/04

Abstract: A connection arrangement for use with a wearable body harness has a first connector having a body with a first portion of a locking mechanism and a second connector having a body with a second portion of the locking mechanism. The first portion of the locking mechanism has a tab connected to the body of the first connector and a slot having a first portion extending through the body of the first connector and a second portion extending through the tab. The second portion of the locking mechanism has a tongue configured for being received through the first portion of the slot, and an intermediate connecting element having a first end connected to the body of the second connector and a second end connected to the tongue. The second end of the intermediate connecting element is offset from the body of the second connector.

公开(公告)号：US20190070443A1

公开(公告)日：2019-03-07

申请号：US15818110

申请日：2017-11-20

Applicant: MSA Technology, LLC

Inventor： Mitchell H. Hetrich ,  Robert Pitt

IPC: A62B35/00

Abstract: A connector includes a frame having a first end, a second end, and a pass-through opening extending between the first end and the second end along a longitudinal axis of the frame. The connector further has a gate positioned between the first end and the second end of the frame and movable between a closed position to close the pass-through opening and an open position to open the pass-through opening. A locking mechanism selectively locks the gate in the closed position. The locking mechanism has a rotatable knob connected to at least one of the first end and the second end of the frame and rotatable in a direction about the longitudinal axis, and a locking indent on the gate configured for receiving at least a portion of the rotatable knob when the gate is in the closed position. The rotatable knob is rotationally biased by a biasing mechanism.

公开(公告)号：US20190069644A1

公开(公告)日：2019-03-07

申请号：US15698264

申请日：2017-09-07

Applicant: MSA Technology, LLC

Inventor： Mitchell H. Hetrich ,  Robert Pitt

IPC: A44B13/00 ,  A62B35/00

Abstract: A connector includes a frame having a first end, a second end, and a pass-through opening extending between the first end and the second end along a longitudinal axis of the frame. The connector further has a gate positioned between the first end and the second end of the frame and movable between a closed position to close the pass-through opening and an open position to open the pass-through opening. A locking mechanism selectively locks the gate in the closed position. The locking mechanism has a rotatable knob connected to at least one of the first end and the second end of the frame and rotatable in a direction about the longitudinal axis, and a locking indent on the gate configured for receiving at least a portion of the rotatable knob when the gate is in the closed position. The rotatable knob is rotationally biased by a biasing mechanism.

公开(公告)号：US10197525B2

公开(公告)日：2019-02-05

申请号：US14976034

申请日：2015-12-21

Applicant: MSA TECHNOLOGY, LLC

Inventor： Towner Bennett Scheffler

IPC: G01N27/404 ,  G01N27/30

Abstract: A method of operating an electrochemical gas sensor, which includes at least one working electrode including an electrocatalyst and having a ratio of total electrochemically accessible surface area to geometrical surface area of at least 2:1, includes alternatively biasing a potential of the at least one working electrode to a first potential at which the electrocatalyst is active to catalyze a redox reaction of a first target gas and to a second potential, different from the first potential, at which the electrocatalyst is substantially inactive to catalyze the redox reaction of the first target gas, a plurality of times, measuring a first output signal arising from the redox reaction of the first target gas at the first potential, and deconvoluting the first output signal while the at least one working electrode is biased at the first potential to separate a portion of the first output signal arising from non-faradaic current to determine a concentration of the first target gas.