Title: Air filtration gas mass

Abstract: An air filtration unit of the type having a liquid filtration medium in a canister with air entering below the level of the liquid, bubbling up into an upper air chamber and thence conducted to a face mask, is simplified for use not only in sedentary occupations but so that it can be used by workmen in strenuous occupations requiring leaning over, lying down, etc. One way valves assure that only scrubbed air enters the face mask, the mask is peripherally sealed and float, or gravity, valves prevent leakage into the mask, or out of the canister, when the unit is in abnormal position. In non-portable form, air filtration masks, peripherally sealed on the wearer's face have a common air chamber with air drawn thereinto from outisde the pollution environment.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Muto, Rudolph (Andover, MA, US)

Application Number: 535446
Filing Date: 1974-12-23
Publication_date: 1976-09-14
Assignee:
Primary Class(es): 128/200.13 55/355, 55/DIG35, 96/279
Other Classes:
US Patent Ref:

300246	Jun, 1884	Goldberg	128/145.
1196539	Aug, 1916	Goldberg	128/146.
1789262	Nov, 1931	Monro et al.	128/140.
2088720	Aug, 1937	Poliniak	128/146.
2725876	Dec, 1955	Maille	128/145.
2875759	Mar, 1959	Gallghe, Jr.	128/146.
2895472	Jul, 1959	Matheson	128/146.

Other Refs: 959,619

Mar, 1957	DT

Primary Examiner: Kamm, William E.
Assistant Examiner:
Attorney: Pearson; John H.