1
David B Edwards: Powered respirators. Racal Safety, Jerry A Miller, July 30, 1991: US05035239 (40 worldwide citation)

A powered respirator is provided with a device sensitive to the pressure within the respirator in the region of the user's face and adapted to sound a warning in the event that the sensed pressure goes below a selected threshold value. The device includes a flexible diaphragm exposed on its opposite ...


2
George K Greenough: Powered respirators. National Research Development Corporation, Cushman Darby & Cushman, June 30, 1992: US05125402 (38 worldwide citation)

A powered respirator of self-contained form for use in oxygen-sufficient atmospheres comprises a visored helmet (10) defining in use a passageway (15) extending from a rear opening (16) across the user's head (13) and face, an electric fan (17) and filter (19) located adjacent the opening to pass re ...


3
Greenough George King: Powered respirators. Nat Res Dev, June 10, 1987: GB2183488-A (10 worldwide citation)

A powered respirator of self-contained form for use in oxygen-sufficient atmospheres comprises a visored helmet (10) defining in use a passageway (15) extending from a rear opening (16) across the user's head (13) and face, an electric fan (17) and filter (19) located adjacent the opening to pass re ...


4
Edwards David Brian: Powered respirators.. Racal Safety, January 3, 1990: EP0349191-A2 (6 worldwide citation)

A powered respirator is provided with a device (10) sensitive to the pressure within the respirator in the region of the user's face and adapted to sound a warning in the event that the sensed pressure goes below a selected threshold value. The device includes a flexible diaphragm (13) exposed on it ...


5
Greenough George King: Powered respirators.. Nat Res Dev, June 16, 1987: EP0225744-A1 (5 worldwide citation)

A powered respirator of self-contained form for use in oxygen-sufficient atmospheres comprises a visored helmet (10) defining in use a passageway (15) extending from a rear opening (16) across the user's head (13) and face, an electric fan (17) and filter (19) located adjacent the opening to pass re ...


6
Edwards David Brian: Powered respirators. Racal Safety, January 17, 1990: GB2220574-A (5 worldwide citation)

A powered respirator is provided with a device (10) sensitive to the pressure within the respirator in the region of the user's face and adapted to sound a warning in the event that the sensed pressure goes below a selected threshold value. The device includes a flexible diaphragm (13) exposed on it ...


7
Howie Robin Middlemass: Dust filter respirator. Coal, October 22, 1986: GB2173705-A (4 worldwide citation)

A dust filter respirator has a mask, 1, with an air inlet, 6. An air mover unit, 7, containing a fan 9, may be interposed between the mask inlet and the outlet, 15, of a filter, 13, or the filter may be connected directly to the mask. The arrangement is simple, can give adequate protection in differ ...


8
Kenneth J Krepel, Brian S McGinley, Neal A Rakow, Paul A Sevcik, Cristina U Thomas: Determining compatibility of components for assembling approved personal protection configurations. 3M INNOVATIVE PROPERTIES COMPANY, February 6, 2018: US09886608

This disclosure relates generally to methods and systems for determining whether at least a first component and a second component of a personal protection (PP) configuration are compatible so as to be assembled into an approved PP configuration, responsive to being compared against at least one pre ...


9
Ramon Hofer Kraner, Leo Keller: Protection device for a welder. OPTREL, Posz Law Group, April 4, 2017: US09610198

A welder protection device comprising a shell and a transparent front cover for protection of a wearer of the welder protection device, and an auto-darkening optical filter. The welder protection device further comprises a retracting mechanism arranged to move the optical filter optical filter from ...


10
Edwards David Brian: Powered respirators. Racal Safety, July 29, 1992: GB2252048-A

A powered respirator helmet is provided with a device 10 sensitive to the pressure within the respirator in the region of the user's face and adapted to sound a warning in the event that the sensed pressure goes below a selected threshold value. The device includes a flexible diaphragm 13 tapped in ...