US 12,478,125 B2
Face shield with powered air purifying respirator and methods of use
Robert J. Henshaw, Newnan, GA (US)
Filed by Robert J. Henshaw, Newnan, GA (US)
Filed on Sep. 29, 2021, as Appl. No. 17/489,623.
Claims priority of provisional application 63/084,895, filed on Sep. 29, 2020.
Prior Publication US 2022/0095736 A1, Mar. 31, 2022
Int. Cl. A42B 3/22 (2006.01); A42B 3/28 (2006.01); A61F 9/06 (2006.01); A62B 18/04 (2006.01)
CPC A42B 3/225 (2013.01) [A62B 18/045 (2013.01); A42B 3/288 (2013.01); A61F 9/068 (2013.01)] 24 Claims
OG exemplary drawing
 
1. An air purifying respirator for a user's head having a face and a forehead to deliver a filtered air and provide shield to a splatter, said respirator comprising:
a face shield, said face shield configured to shield the user's face from the splatter;
a powered air purifying system, said system having
at least one fan configured to provide a positive air pressure between said face shield and the user's face;
a fan housing positioned proximate an upper edge of said face shield, said fan housing having a fan support, a forehead support wall, a filter cowl having an outer perimeter flange formed as a single ruled surface, said outer perimeter flange having a front perimeter flange edge configured as a visor and an arched back perimeter flange edge positioned back and above said front perimeter flange edge, said front perimeter flange edge configured to support said fan internally therein and to enable efficient movement of the air;
a head strap attached to said fan housing, said head strap configured to encircle at least a portion of the users head, said head strap configured to support said fan housing; and
a filter media configured as a two-dimensional planar profile, said filter media adapted to be fitted to said outer perimeter flange of said filter cowl to provide a large visor shape surface area of said filter media, while providing a minimum of an overall size of the air purifying respirator;
wherein said fan pulls the air through said filter media, and said fan is configured to push the filtered air from said fan housing to between said face shield and the user's face as said positive air pressure.