Individual respirators containing compositions based on potassium superoxide

Claim 2

Cartridge for the regeneration of expired gases adapted to be incorporated in an individual respirator according to claim 1, constituted by a cylindrical body having an upper end and a lower end and made from a material compatible with the potassium superoxide and closed by two fluid-tight end faces and within which the potassium superoxide pellets are lodged, wherein, at the lower end, a self-supporting curved ''''vault'''' structure is constituted by a filter supporting thereabove the regeneration charge.

Claim 3

Cartridge for the regeneration of expired gases and adapted to be incorporated in an individual respirator according to claim 3, wherein the filter comprises two perforated spaced, curved metal elements in the gap between which a filtering element is lodged.

Claim 4

Cartridge for the regeneration of expired gases according to claim 3, comprising at its upper end a spring the elongation of which is limited in such manner that the volume of the regeneration charge is controlled.

Claim 5

CaRtridge for the regeneration of expired gases according to claim 5, comprising a curved portion formed in the cylindrical body of the cartridge and limiting the elongation of the spring, a first metal disc having wide perforations adjacent said spring, and a second metal disc having fine perforations adjacent said first metal disk, said discs being interposed between the pellets and the spring and bearing on the said curved portion; and wherein at least one insert separates the pellets into at least two charges of equal volume; and the filter comprises a first curved metal disc formed with wide perforations butting on a curved portion formed in the cylindrical body at the lower end thereof, and a further curved metal disc spaced from said first curved metal disc and formed with fine perforations; further wherein the end faces of the cartridge are provided with thin foils.

Claim 6

Cartridge for the regeneration of expired gases according to claim 6, wherein the metal disc having wide perforations is a disc of expanded metal and the metal disc having fine perforations is a fine mesh metal gauze.

Claim 7

A cartridge for the regeneration of expired gases according to claim 1, wherein the potassium superoxide pellets are in the form of pellets-pastilles comprising a cylindrical body and two curved end faces, the radius of curvature of which is substantially equal to the diameter of the pellet.

Claim 8

A cartridge for the regeneration of expired gases according to claim 8, wherein the porosity of the compositions based on potassium superoxide ranges is between 40 and 50 percent.

Claim 9

A cartridge for the renegeration of expired gases according to claim 9, wherein the compositions based on potassium superoxide are obtained by the compression of a potassium superoxide powder under a relative pressure of 80 to 120 kg/cm2.