Accession Number : ADD011973

Title :   Gas Mask Filters Test Apparatus Using a Breathing Pump.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : James,John T ; Buettner,Leonard C ; Genovese,James A

Report Date : 06 Sep 1985

Pagination or Media Count : 19

Abstract : The present invention relates in general to equipment and methods for testing filters, and in particular to a new and useful apparatus and method for testing a gas mask filter under simulated breathing conditions and using test animals. According to the invention, the challenge (toxic, irritating, etc.) and effluent (filtered) gases are chemically analyzed. At the same time the toxicity of the effluent gases are determined by exposing a test animal to these gases. More realistic test conditions are thus simulated. In addition, rather than supplying the challenge gas in a constant flow to the filter, flow variations which simulate human respiration are utilized. Small variations in the composition of the filter affect its ability to protect against certain test vapors and such variations in composition can be determined utilizing the present invention. An objective of the present invention is to provide an apparatus for testing a gas mask filter element. The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of the disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its uses, reference is made to the accompanying drawings and descriptive matter in which preferred embodiments of the invention are illustrated. (Patent application)

Descriptors :   *GAS FILTERS, *GAS MASKS, *PATENT APPLICATIONS, *BREATHING APPARATUS, EFFLUENTS, CONSTANTS, GASES, HUMANS, INVENTIONS, FLOW RATE, FLOW, ANIMALS, PUMPS, RESPIRATION, SIMULATION, TOXICITY, VAPORS, VARIATIONS

Subject Categories : Pumps, Filters, Pipes, Tubing, Fittings & Vlvs
      Life Support Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE