Abstract In emergency breathing apparatus a case has a back section and a removable front cover section that are normally held together. Inside the case an air regenerating canister is secured to the back section and has a port in one end, to which a flexible breathing hose is connected. The opposite end of the canister is provided with an opening in each side, each of which is connected with an opening in one end of a breathing bag extending along that side of the canister. The hose and bags normally are folded within the case. The other ends of the bags are connected by means formed to extend around the back of the neck of a user of the apparatus to suspend the bags over his chest when they are removed from the case, with the canister between the bags.
Inventors
👤 Harry N Cotabish
👤 Layton A Wise
👤 Elmer E Buban
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-23 17:11
CPC Classifications
A; A62; A62B; A62B7/00; A62B7/10; A62B19/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
An air regenerating canister according to claim 1, said inlet-outlet port being adjacent the front wall of the housing, the canister including a perforated plate in said long chamber engaging said partition and inclined backwardly therefrom to a point behind said port, the plate having tapered side flanges spacing it from the front wall, a filter mat engaging the back of the plate, a first screen engaging the back of the mat, a second screen spaced behind the first screen with said chemical bed between them, a filter mat behind the second screen, an inclined perforated plate engaging said partition behind the second mat, and a spring between the back plate and the back wall of the housing and pressing the back plate forward.
Claim 2
Dependent Claim
20 words
An air regenerating canister according to claim 2, the canister also including molecular sieves between said chemical bed and screens.
Claim 3
Dependent Claim
51 words
An air regenerating canister according to claim 1, said inlet-outlet port being adjacent the front wall of the housing and opening into the adjacent end of the space between the chemical bed and said front wall, the canister including perforated means holding said bed spaced from the font and back walls.
Claim 4
Dependent Claim
86 words
An air regenerating canister according to claim 1, said inlet-outlet port being adjacent the front wall of the housing and opening into the adjacent end of the space between the chemical bed and said front wall, the canister including perforated plates substantially coextensive with the front and back of said bed, one of said plates having side flanges spacing it from the adjacent canister wall facing that plate, and resilient means compressed between the other plate and the canister wall facing it and urging them apart.