05140980 is referenced by 131 patents and cites 23 patents.

The present invention is directed to a hood mask for protecting the wearer from chemical and biological environmental contaminants. The hood mask includes a hood having a substantially tubular portion which includes a closed upper end, an open lower end and a continuous side wall having inner and outer surfaces. An air filter assembly is connected to the tubular portion to purify air breathed into the interior of the hood by the wearer. The filter assembly includes a first layer formed of a first member and a second layer including a holder which supports a rigid shell member which houses a second filter member. The holder is formed of a flexible material which as a throughbore in which the shell member is disposed. The first layer and the holder are sealed to one another at their outer edges. The hood mask can be assembled by positioning the first layer and the second layer of the filter assembly adjacent one another and adjacent the tubular portion of the hood mask such that the first layer is interposed between the second layer and the tubular portion, and sealing the first layer and the second layer at their outer edges to the tubular portion by a heat sealing process. A separator member is disposed between the first layer and the second layer in a floating or a non-secured condition relative to the tubular portion of the hood mask.

Title
Hood mask and air filter system and method of manufacture thereof
Application Number
7/538036
Publication Number
5140980
Application Date
June 13, 1990
Publication Date
August 25, 1992
Inventor
Lisa H Jackson
Dover
DE, US
John R Haughey
Dover
DE, US
Agent
Stevens Davis Miller & Mosher
Assignee
ILC Dover
DE, US
IPC
A62B 18/02
A62B 23/02
A62B 19/00
A62B 7/10
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