Fast donning respiratory protection equipment
First Claim
1. Fast donning breathing apparatus, comprising:
- a mask provided with a regulator arranged for connection to a source of pressurized breathable gas; and
a harness having;
two stretchable straps forming Vs from common points of attachment on the mask and each including an inflatable element,means connectable to a source of pressurized breathable gas and manually controllable to admit a pressurized breathable gas to the inflatable elements to extend said stretchable straps up to a large size and to discharge said pressurized breathable gas from said inflatable elements to decrease the size of said stretchable strap and to enable the straps to tighten and to bias the mask onto a face of a wearer,a flexible hardly extensible additional strap having a fastener arranged for direct manual tightening by the wearer, said additional strap being located between said two stretchable straps, anda plurality of bands connecting said additional strap to said stretchable straps at intervals.
2 Assignments
0 Petitions
Accused Products
Abstract
The fast donning breathing apparatus for use by a crew member comprises a mask provided with a regulator for connection to a source of pressurized breathable gas and a harness having. The harness has a stretchable strap having ends connected to the mask and including an element which is optionably inflatable by the pressurized breathable gas to extend the strap up to a size which is sufficient to permit fitting of the harness on the head and deflatable to enable the strap to tighten, to bias the mask onto the face and to hold the mask in position. The harness also has a flexible hardly extensible additional strap. A fastener enables to adjust the length of the additional strap and permits direct manual tightening by a user.
316 Citations
7 Claims
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1. Fast donning breathing apparatus, comprising:
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a mask provided with a regulator arranged for connection to a source of pressurized breathable gas; and a harness having; two stretchable straps forming Vs from common points of attachment on the mask and each including an inflatable element, means connectable to a source of pressurized breathable gas and manually controllable to admit a pressurized breathable gas to the inflatable elements to extend said stretchable straps up to a large size and to discharge said pressurized breathable gas from said inflatable elements to decrease the size of said stretchable strap and to enable the straps to tighten and to bias the mask onto a face of a wearer, a flexible hardly extensible additional strap having a fastener arranged for direct manual tightening by the wearer, said additional strap being located between said two stretchable straps, and a plurality of bands connecting said additional strap to said stretchable straps at intervals. - View Dependent Claims (2, 3, 4, 5)
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6. Fast donning breathing apparatus for use by a wearer with and without a helmet, comprising:
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a mask provided with a regulator arranged for connection to a source of pressurized breathable gas; and a harness having; a pair of stretchable straps having ends connected to said mask at connecting points to form Vs from said connecting points and including an element which is inflatable by a pressurized breathable gas to extend the strap up to a size which is sufficient to permit fitting of the harness over the helmet and is deflatable to enable the strap to tighten and to tightly seal the mask onto a wearer'"'"'s face when located around the helmet, cord means interconnecting said stretchable straps, and a flexible additional strap of hardly extensible material having a fastener arranged for direct manual tightening by the wearer of the equipment, said additional strap being located between the two stretchable straps and passing through said cord means. - View Dependent Claims (7)
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Specification