초록 ▼

A snap-on filter for chemical cartridges is presented which includes a filter element comprising a perforated fiberglass prefilter bonded to a felt filter. The filter element is contained within a filter housing which snaps onto the chemical cartridge of a standard gas mask. The fiberglass prefilter

A snap-on filter for chemical cartridges is presented which includes a filter element comprising a perforated fiberglass prefilter bonded to a felt filter. The filter element is contained within a filter housing which snaps onto the chemical cartridge of a standard gas mask. The fiberglass prefilter is perforated to provide a passage way for fumes into the interior of the filter as well as the filter surface. The perforations increase the overall surface area of the prefilter for filtration. This feature enhances the efficiency and overall life of the filter element.

대표청구항 ▼

A filter for filtration of air entering a chemical cartridge of a gas mask, the filter comprising: a filter element for filtration of particulate contaminants from an air stream, said filter element including: (1) a prefilter having a plurality of spaced perforations therethrough; and (2) a secondar

A filter for filtration of air entering a chemical cartridge of a gas mask, the filter comprising: a filter element for filtration of particulate contaminants from an air stream, said filter element including: (1) a prefilter having a plurality of spaced perforations therethrough; and (2) a secondary filter bonded to said prefilter; filter housing means for housing said filter element, said filter housing including mounting means for mounting onto a chemical cartridge of a gas mask.