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US 5,538,001 AGranted
Oxygen masks
AssigneeThe Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Northern Ireland and Great Britain
InventorPeter C. Bridges
Life of this patent
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Abstract
A pressure breathing mask, particularly an aircrew oxygen mask, includes an exoskeleton (10), a flexible facepiece (11) with an oxygen delivery connection (15), an inflatable bladder (20) positioned between the exoskeleton (10) and a rigid intermediate member (30), the intermediate member (30) bearing on the facepiece (11), and means (21, 23) for automatically inflating the bladder (20) when oxygen is delivered under pressure to the mask.
Claims7
A pressure breathing mask including:
- a rigid exoskeleton;
- means for attaching the exoskeleton to a helmet;
- a flexible facepiece with a gas delivery connection;
- inflatable means positioned between the exoskeleton and the facepiece;
- means for automatically inflating the inflatable means when gas is delivered under pressure to the facepiece;
- and
- a rigid intermediate member interposed between said inflatable means and said flexible face piece, said rigid intermediate member, conforming to the general configuration of the flexible facepiece, for bearing against the facepiece and for conveying the effects of inflating the inflatable means to the facepiece.
4 more elements
Dependencies are inferred from the claim text.