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Breathing apparatus with two breathing bags

A breathing bag and breathing gas technology, applied in the direction of respiratory protection equipment, transportation and packaging, ships, etc.

Inactive Publication Date: 2015-03-18
GRIMSEY MARINE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this approach is that the difference between the upper and lower limits is relatively small and may need to be adjusted as the depth of the diver changes

Method used

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  • Breathing apparatus with two breathing bags
  • Breathing apparatus with two breathing bags
  • Breathing apparatus with two breathing bags

Examples

Experimental program
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Embodiment Construction

[0125] In this description, the term vertical means the orientation relative to a standing user wearing a double counterlung backpack. Other references to orientation may be interpreted accordingly.

[0126] refer to Figure 1-3 , the diver's double counterlung has a main body 1 , an outer membrane 2 , a vertical hinge plate 3 and an inner membrane 4 that separates the supply counterlung from the recovery counterlung. As shown by arrow 6, the substantially horizontal hinge axis 5 allows the side-by-side arrangement of counterlungs to act like bellows inflating and contracting. A represents the diver's mouth, B represents the suprasternal notch, and C represents the center of gravity of the lungs.

[0127] A force decomposition of the forces acting on the counterlungs shows that the average pressure on the two counterlungs and the water pressure at a point two-thirds of the distance from the hinge to the opposite edge of the plate is the same distance as point D. The distanc...

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Abstract

A double counterlung for the breathing circuit of a diver has regulators (41, 51) for automatic addition and venting of breathing gas. Also disclosed is a weighted hinged plate (3) for a double counterlung, to reduce breathing effort when the diver is horizontal. Other improvements to the breathing circuit are described including use of a two stage compressor (151, 155), and single actuator valves for back-up circuits.

Description

technical field [0001] The present invention relates to a breathing apparatus, but it is not just for diving. Background technique [0002] WO89 / 01895 A1 discloses a breathing apparatus for divers in which a double counterlung comprises inlet and outlet chambers connected together in a hinged bellows structure so as to inflate and deflate together. The shut-off valve isolates the counterlung from the supply line when the counterlung is full and the return line when the counterlung is empty. Safety valves prevent divers from overpressurizing or aspiration of the lungs. This setup allows the airflow to fluctuate with the diver's breath, offering mechanical simplicity and reliability compared to other devices. [0003] The diver's double counterlung described in WO89 / 01895 A1 utilizes a hinged plate to limit the replenishment and recovery of the counterlungs, allowing them to be filled and emptied simultaneously. During normal operation, the gas is cycled at a constant rate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63C11/24A62B7/02
CPCB63C11/24B63C11/202B63C11/22
Inventor 彼得·格里姆塞
Owner GRIMSEY MARINE TECH
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