Resistance and filtration breathing device
C Danford - US Patent 10,322,312, 2019 - Google Patents
A resistance breathing device includes a face mask having an inlet aperture, an intake
restricting element having an inlet aperture, and an adjustment mechanism, the intake …
restricting element having an inlet aperture, and an adjustment mechanism, the intake …
Respirator
R Cartwright - US Patent App. 29/622,325, 2020 - Google Patents
1917, 961 A 7/1933 Fee FIG. 6 is a left-side elevational view of the respirator shown
2,579,942 A* 12/1951 MacLean...................... A6| F 9/() 68 in FIG. 1;| 28/2 ()|| 25 FIG. 7 is a top …
2,579,942 A* 12/1951 MacLean...................... A6| F 9/() 68 in FIG. 1;| 28/2 ()|| 25 FIG. 7 is a top …
Respirator
F Dirk, A Busch, V Nesch - US Patent 10,369,322, 2019 - Google Patents
A breathing apparatus includes a compressed air source with a compressed air source
valve, a breathing regulator with a pressure reducer and a demand valve, a breathing mask …
valve, a breathing regulator with a pressure reducer and a demand valve, a breathing mask …