Importance

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Abstract

Leak test adaptor apparatus for facilitating leak testing face mask respirators including an outer member having a bore therethrough, the bore having a first end and a second end; an inner member disposed in the bore of the outer member, the inner member having a channel therethrough defining a flow path for passage of the gas through the channel from the first end to the second end of the bore; a pressure responsive valve connected to the inner member for regulating the flow of the gas through the channel; and a gas sampling port in communication with the bore for sampling the gas in the bore. The pressure responsive valve closes the channel when the gas pressure near the second end of the bore is greater than the gas pressure near in the channel and opens the channel when the gas pressure nearer the second end of the bore is less than the gas pressure in the channel. The pressure-responsive valve, which is disposed in the flow path of the gas, includes a valve seat connected to the inner member, a valve shaft connected to the valve seat, and a substantially thin disk-shaped gate member slidable connected to the valve shaft, which gate member is capable of closing and opening the channel by sliding along the valve shaft when acted upon by the difference in gas pressure between the channel and the second end of the bore.

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First Claim