Underwater oxygen supply system
First Claim
1. An underwater breathing apparatus having a pressurized air tank, a primary breathing apparatus, and a separate secondary breathing apparatus with mouthpiece wherein the improvement comprises:
- (a) a pressurized oxygen tank secured to the air tank;
(b) a first conduit coupled to the air tank and a separate second conduit coupled to said oxygen tank;
(c) a gas mixing valve coupled to both said conduits intermediate the secondary breathing apparatus and said conduits, said gas mixing valve comprising;
i. selector switch means for selectively supplying either pressurized air from the air tank, pressurized oxygen from said oxygen tank, or a pressurized air/oxygen mixture to the secondary breathing apparatus;
ii. an internal mixing chamber for combining said pressurized air and said pressurized oxygen therein prior to delivering said pressurized air/oxygen mixture to the secondary breathing apparatus; and
,iii. check valve means for preventing backflow through said gas mixing valve.
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Accused Products
Abstract
An underwater breathing apparatus capable of supplying either 100% air, 100% oxygen, or an air/oxygen mixture to a diver as needed. A selector switch clearly indicates what is being supplied through the separate secondary breathing apparatus (or "octopus") of the rescuing diver. Also disclosed is a face mask to be placed around the nose and mouth of a diver in distress that is configured with an adaptor which accepts and seals around the mouthpiece of the secondary breathing apparatus. In this fashion, the rescuing diver can supply either air, oxygen, or a mixture of the two to a diver in distress in either a free-flow state or upon demand.
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Citations
9 Claims
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1. An underwater breathing apparatus having a pressurized air tank, a primary breathing apparatus, and a separate secondary breathing apparatus with mouthpiece wherein the improvement comprises:
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(a) a pressurized oxygen tank secured to the air tank; (b) a first conduit coupled to the air tank and a separate second conduit coupled to said oxygen tank; (c) a gas mixing valve coupled to both said conduits intermediate the secondary breathing apparatus and said conduits, said gas mixing valve comprising; i. selector switch means for selectively supplying either pressurized air from the air tank, pressurized oxygen from said oxygen tank, or a pressurized air/oxygen mixture to the secondary breathing apparatus; ii. an internal mixing chamber for combining said pressurized air and said pressurized oxygen therein prior to delivering said pressurized air/oxygen mixture to the secondary breathing apparatus; and
,iii. check valve means for preventing backflow through said gas mixing valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification